REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

Asiakkaamme antoivat 46,631 arvostelussa keskimääräisen arvosanan REST API Developers 4.9 / 5 tähteä.
Palkkaa REST API Developers

REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

Asiakkaamme antoivat 46,631 arvostelussa keskimääräisen arvosanan REST API Developers 4.9 / 5 tähteä.
Palkkaa REST API Developers

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    87 löydetyt työt

    I have an existing Ionic (Cordova, Angular, SCSS) app that needs two things at once: a small set of new features and a clear visual lift. On the UI/UX side I’ve decided to focus on visual enhancements—cleaner colour palettes, updated icons, smoother transitions and micro-animations that give the app a modern, consistent feel across Android and iOS. I can share brand guidelines and screens so you can translate them into themed components and style sheets. Functionally, there are a few minor additions to wire in: extra screens, small workflow tweaks and new calls to the current REST API. I’ll walk you through the repo and explain the exact user stories once we start. Deliverables • Updated source code with agreed visual improvements • New functionality fu...

    €27 Average bid
    €27 Keskimäär. tarjous
    7 tarjoukset

    I’m kicking off a three-month, full-time engagement (with the option to extend) to move a sizeable customer data set from legacy sources into Salesforce while simultaneously wiring Salesforce into our wider application landscape through SnapLogic. The core objective is both migration and integration, so you’ll be hands-on across the entire data journey—from extracting millions of legacy records to building high-performance SnapLogic pipelines that keep Salesforce in sync with ERP, marketing, and other in-house systems. What the work looks like • Assess current data structures and map them cleanly to the Salesforce data model, respecting relationships, look-ups, and custom objects. • Build and optimise SnapLogic pipelines for bulk loads, transformations, and...

    €1915 Average bid
    €1915 Keskimäär. tarjous
    8 tarjoukset

    I'm looking for an specialist to build an automation that handles product imports from an XML file into via API. Fetching & Parsing XML Scheduled/recurring fetching of an XML file from a given URL (or FTP) Parsing product data (name, price, EAN, stock quantity, images, etc.) Pushing Data to via API Creating new products in if they don't exist yet Updating existing products (prices, stock levels) Mapping XML fields → fields Zeroing Out Products Missing from XML Comparing the current XML product list with products in a specific warehouse in Products not present in the XML should have their stock quantity set to 0 — only for the selected warehouse, without affecting other warehouses Technical Requirements Proven experience with (scenario building, HT...

    €131 Average bid
    €131 Keskimäär. tarjous
    54 tarjoukset

    I’m running an ERPNext instance that already holds our core data, but several areas still need to be molded to the way we actually work. I’d like you to dive into the Frappe Framework, extend existing DocTypes, design new workflows, and tighten up reports so my team no longer fights the software. Here’s what I need from you: • Tailored module tweaks – create or modify DocTypes, forms, and server-side logic that capture our real-world processes. • Workflow and automation improvements – from simple client scripts to background jobs that remove manual steps. • Custom reports – actionable, filterable views my managers can use daily. • Integration readiness – if we decide to hook ERPNext to external services later, your code ...

    €3 / hr Average bid
    €3 / hr Keskimäär. tarjous
    19 tarjoukset

    SaaS Developer with API Integration & Data Scraping Expertise We are seeking an experienced SaaS developer to create production-grade, error-free software solutions. The ideal candidate will have a proven track record in building robust applications with seamless API integrations, efficient data scraping and Paid Ads APIs (Meta, Google, Snapchat, TikTok) capabilities. Key Requirements: - Experience with Apify scrapers and API integration - Proficiency with Lovable app for SaaS development - Strong experience with Meta, Google, TikTok, and Snapchat Ads APIs - Ability to integrate with Vibe coded SaaS platforms - Full-stack web development skills - Experience with Python, JavaScript, PHP - API design and integration (REST, GraphQL, OAuth, webhooks) - Data scraping at scale with cleanin...

    €8 / hr Average bid
    €8 / hr Keskimäär. tarjous
    101 tarjoukset

    I’m a Hindustan Unilever distributor who currently exports data from two separate LeverEdge (Retail and Wholesale) instances and then uploads it manually into Zoho Books. I’d like that entire flow replaced by a Python-driven, Zoho RPA-assisted bot that runs end-to-end without human touch. Here is the scope you’ll be taking over: • Dual login sequence – the bot must authenticate into each LeverEdge account one after the other, pull the day’s XML/Excel dumps, and keep the two data sets isolated for reporting. • Nine functional modules must stay in perfect sync: Sales Register, Collection, Product & Party Masters, Purchases, Purchase Returns, Credit Notes, Debit Notes, Tax Analysis, and HUL-specific Scheme calculations. • Data transformat...

    €1010 Average bid
    €1010 Keskimäär. tarjous
    26 tarjoukset
    API Integration for Deposit Authorization
    6 päivää left
    Varmennettu

    Title: WordPress / API Developer – Hotel Deposit Authorization System + Hostex Integration Project Description I operate a small hotel / short-term rental business and use Hostex PMS to manage reservations. I need a developer to build a security deposit authorization system connected to my WordPress website. Guests should receive a secure link before arrival where they can enter their credit card to place a security deposit authorization hold (not a charge). Current Infrastructure • VPS server (Ubuntu) • Docker environment • CloudPanel • WordPress website • WooCommerce • Hostex PMS • Payment gateway: Xendit • n8n automation server The developer can deploy services using Docker containers if needed. Deposit Workflow 1. Guest makes a rese...

    €149 Average bid
    €149 Keskimäär. tarjous
    139 tarjoukset

    I generate a steady flow of personal-loan leads every day and I’m ready to start monetising them. What I still need is the technical and marketplace framework that allows buyers to receive those leads in real time, either through a classic ping/post flow or a straightforward REST API. Here’s what I know so far: • I’m happy to sell through public marketplaces as well as direct integrations, so please feel free to suggest LeadConduit, Lead Prosper, boberdoo, CAKE, or any platform you feel is fit for purpose. • My leads are strictly for the personal-loan space, so whatever routing logic you build needs to respect that vertical’s typical data fields and compliance requirements (TCPA, CAN-SPAM, etc.). • I don’t have any existing infrastructure...

    €159 Average bid
    €159 Keskimäär. tarjous
    82 tarjoukset

    I’m preparing a full set of technical documentation for our REST-based API and would like your help transforming raw engineering notes into clear, developer-friendly references. The focus is strictly on technical documentation—specifically API documentation—so you’ll be structuring endpoints, parameters, response schemas, authentication flows, and usage examples in language that’s easy for both internal and external developers to follow. You’ll receive access to the codebase, interview time with the lead engineer, and a concise style guide. Markdown will be our primary format, and if you are comfortable generating an OpenAPI/Swagger file alongside the written content that would be a plus. All collaboration happens through Git and short check-ins on Slac...

    €460 Average bid
    €460 Keskimäär. tarjous
    31 tarjoukset
    Web Panel for 3Proxy Management
    6 päivää left
    Varmennettu

    I need a web-based administrative panel that lets me oversee several IPv4 proxy servers running 3Proxy from one place. The panel should: • Auto-configure new or rebuilt servers, applying 3Proxy settings and firewall rules without manual SSH work. • Push software updates, configuration edits, and security patches to every connected host remotely. • Expose a documented RESTful API so other systems can create, suspend, rotate, or delete proxies programmatically. • Support multiple user roles—at minimum Admin plus one or more limited roles—with a clean permissions model. • Display real-time status (online/offline, traffic, errors) and basic analytics for each proxy. A straightforward, responsive UI is essential; think login, dashboard, server list...

    €422 Average bid
    €422 Keskimäär. tarjous
    214 tarjoukset

    My team needs a robust, bi-directional link between Wrike and Encodify up and running within the next 4 to 6 weeks. The integration must keep workspaces perfectly in step by handling: • Data synchronisation of tasks, projects, comments, notes and user profiles • Automated task creation / status updates so neither platform becomes a manual bottleneck • Near real-time updates in both systems, triggered by webhooks or an equivalent event-based approach Wrike should push every relevant change to Encodify and vice-versa, with conflict-handling logic to prevent overwrites. A clean audit trail on both sides is essential so we can see exactly when and where items were updated. Deliverables 1. Source-controlled integration code (Wrike & Encodify APIs, REST/OAuth...

    €892 Average bid
    €892 Keskimäär. tarjous
    12 tarjoukset
    Full-Stack Taxi App Development
    6 päivää left
    Varmennettu

    I need an end-to-end build of a taxi-booking ecosystem that covers three mobile experiences (rider, driver, operator) and a cloud-hosted SaaS core. For riders on Android and iPhone, the interface must make it effortless to schedule a trip, watch the vehicle approach in real time, pay by card, wallet or other gateways, and immediately rate the ride and leave feedback. Google / Apple Maps, a mainstream payment gateway and an SMS provider must be wired in cleanly. The operator dashboard will live on the web. It needs to display live fleet locations, let staff drill into analytics and reporting, and surface driver performance metrics at a glance. Charts, exportable reports and real-time filters should all feel native and quick. Drivers get their own app focused on navigation and route...

    €627 Average bid
    €627 Keskimäär. tarjous
    153 tarjoukset

    I need an end-to-end face-recognition attendance solution that splits its workload between a Raspberry Pi at the edge and a lightweight cloud frontend. On the edge – The Raspberry Pi must run an optimised computer-vision model that can detect and recognise multiple faces in the same frame, then immediately tag each recognised person with a timestamp. All inference happens locally; only the processed results travel to the cloud, never the raw video. Model size, frame rate and power draw have to suit a typical Pi 4 with a standard camera module. Connectivity & data flow The Pi should expose a small, secure REST or MQTT service that pushes attendance events to the cloud and retries automatically if connectivity drops. A simple enrolment script should let me add new faces direc...

    €236 Average bid
    €236 Keskimäär. tarjous
    26 tarjoukset

    We will only review applications that clearly prove prior development of a SCORM player or SCORM runtime engine. Please include the name of the player, the project, and a short description of your role in its development. Applications without this proof will not be considered. We are looking for an experienced software development agency to build a SCORM content player that integrates seamlessly with our existing cloud-based Learning Management System (LMS). The objective is to replace our current external content player with our own integrated solution. I. Project Goal Develop a standards-compliant content player capable of running and tracking e-learning content inside our multi-tenant LMS. The player must: - import SCORM courses - launch and play SCORM content - create l...

    €10 / hr Average bid
    €10 / hr Keskimäär. tarjous
    54 tarjoukset

    Looking for Flutter Developer We are looking for an experienced **Flutter developer** for a marketplace mobile app. Project Details: * Backend: Already completed * UI/UX: Figma design ready * Task: Develop the mobile app using Flutter * Timeline: 1 month Budget: ₹15,000 – ₹20,000 (based on experience and delivery) Requirements: * Experience with Flutter and API integration * Ability to convert Figma designs into responsive UI * Good communication and ability to deliver within the timeline

    €146 Average bid
    €146 Keskimäär. tarjous
    55 tarjoukset

    We are looking for a skilled React and Developer to join our remote engineering team. You will be responsible for building scalable, high-performance features across our ticketing and event management platform using modern web technologies. Responsibilities • Develop and maintain web applications using and React • Build scalable backend integrations with PostgreSQL • Integrate and deploy applications using AWS infrastructure • Write clean, maintainable, and well-documented code • Collaborate with product managers, designers, and backend engineers • Optimise application performance and ensure responsiveness • Participate in code reviews and technical planning Required Skills • Strong experience with NestJs and React • Solid understan...

    €24 Average bid
    €24 Keskimäär. tarjous
    20 tarjoukset

    Fluent in English please This project is for the development of a focused AI assistant, not a generic chatbot. The goal is to create a knowledge-based financial guidance assistant that answers questions using curated materials from a book and supporting financial education resources. Please read the full project description carefully before applying. Proposals that clearly demonstrate experience with RAG (Retrieval Augmented Generation) systems and AI chat assistants will receive priority review. Project Overview I have just published my first book on Amazon and will serve as one of the primary knowledge sources used by the AI assistant. I have not applied any marketing for the book at this point as I am waiting for the completion of this project. The project is intentionally focused a...

    €31 / hr Average bid
    €31 / hr Keskimäär. tarjous
    93 tarjoukset

    Browse Surahs & Ayahs: Navigate through all 114 chapters of the Qur’an. Search Functionality: Quickly find specific verses or keywords. Translations: Likely includes English and Urdu translations for better understanding. Tafsir Support: May provide commentary or links to tafsir resources. Favorites/Bookmarks: Save verses for later reading or study. Responsive UI: Works smoothly on both mobile and desktop browsers

    €899 Average bid
    €899 Keskimäär. tarjous
    94 tarjoukset

    We are looking for a Full Stack Developer to build user-friendly and responsive web applications. The developer will mainly work on the frontend while also having basic knowledge of backend integration. Responsibilities Create web pages using HTML, CSS, and JavaScript. Build responsive websites that work on mobile and desktop. Connect frontend pages with backend APIs. Fix bugs and improve user experience. Support basic backend integration when needed. Skills HTML, CSS, JavaScript Frameworks like React, Vue, or Angular Basic knowledge of backend APIs Experience with Git Typical Work Websites Web applications Dashboards and landing pages

    €123 Average bid
    €123 Keskimäär. tarjous
    198 tarjoukset

    I’m expanding our mobile team and need a Flutter front-end developer who can take full ownership of the customer-facing side of a new e-commerce app. The work is 100 % Flutter, so solid Dart fundamentals and at least two years of hands-on experience are non-negotiable. You’ll be shaping every screen in line with our in-house Custom Design System, not off-the-shelf Material or Cupertino components, so an eye for detail and comfort with bespoke styling is essential. Scope of work You’ll turn Figma mock-ups into smooth, production-ready code, wire the UI to the REST endpoints our back-end team exposes, and make sure performance holds up across Android and iOS. While the app may later grow into social or utility features, your immediate focus is strictly e-commerce. Core ...

    €265 Average bid
    €265 Keskimäär. tarjous
    97 tarjoukset
    Node.js Loan Backend Build
    5 päivää left
    Varmennettu

    I am assembling a new loan-processing platform and need a seasoned Node.js developer to stand up the entire backend. The core of the job is to architect and code secure user authentication and authorization, handle the full life-cycle of a loan application form, and build reliable payment processing with clear tracking of every transaction and status change. For data persistence I would like you to work with a SQL database—MySQL or PostgreSQL are both fine—so please structure your models and migrations accordingly. Beyond our own data store, the service must connect smoothly to several third-party providers: a credit-score API to pull applicant scores in real time, a payment gateway for disbursements and repayments, and notification services that let us push SMS and email upda...

    €231 Average bid
    €231 Keskimäär. tarjous
    79 tarjoukset
    Flutter/React Native App Build VibeVision
    5 päivää left
    Varmennettu

    I need a cross-platform mobile application delivered for both Android and iOS within roughly four to six weeks. The stack can be either Flutter or React Native, but whichever route you choose must integrate smoothly with a REST-based API layer and rely on Firebase or MySQL on the back end. Core requirements: Email-and-password user authentication Real-time push notifications Clean, intuitive UI/UX that feels truly native on each platform Full deployment support—store listing preparation, signing, and submission Deliverables: Fully functional mobile app Source code in a well-structured repo Build/run instructions Concise technical documentation Evidence of testing (unit and basic UI tests)

    €1005 Average bid
    €1005 Keskimäär. tarjous
    126 tarjoukset

    I’m creating an online destination where soccer enthusiasts can check reliable, data-driven match predictions before every kick-off. The engine behind the site will combine large sets of historical match data with up-to-the-minute season statistics, feeding them into a machine-learning model that outputs win-draw-loss probabilities and scoreline estimates. What I need from you is the full build: model selection or custom architecture, data-pipeline automation that fetches and refreshes both the historical archive and the current-season feeds, and a clean web interface that presents predictions in an easy, fan-friendly format. Odds-style percentages, form graphs, and key player influences should surface prominently so visitors can grasp the rationale behind each forecast without re...

    €474 Average bid
    €474 Keskimäär. tarjous
    187 tarjoukset
    Indian Language Dictionary App
    5 päivää left
    Varmennettu

    I have a complete, well-structured glossary of Indian local-language terms and definitions ready to load into a brand-new mobile dictionary. What I need now is the actual app—clean, fast and intuitive—running on both iOS and Android from a single codebase. Core experience I want the user to have • Instant search that returns relevant matches as the user types • Smooth browsing by thematic categories (I will supply the categories) • A daily “Word of the Day” card, ideally with an optional push notification Community input matters too. Users should be able to suggest new words or edits, but nothing goes live until I approve it in an admin screen or lightweight web dashboard. I will hand you the full content as JSON/CSV along with basic UI refer...

    €127 Average bid
    €127 Keskimäär. tarjous
    63 tarjoukset
    C# or Python Timeseries forecasting
    5 päivää left
    Varmennettu

    • Description We have input data which is the wind speed and direction. The data consists of Recent History (input) Internal (output) Forecast (only use the regular-lat-lon-simple-level) to forecast the future: We will give you the links. Your desktop app, will use the recent history to train the model with the internal output. In realtime, your app will also read the latest file from U and V 10m to produce the latest forecast. The forecast is run every hour and will be saved into our database. We will give you the REST api to save your data. We will also need you to create a script to backtest the model. i.e. using the actual data of Jan to Dec 2024 to forecast the data of Jan 2025. The window can slide so Feb to Jan 2025 to forecast the data of Feb 2025 etc. We will also need ...

    €246 Average bid
    €246 Keskimäär. tarjous
    194 tarjoukset
    Google Drive–Gemini AI Connector
    5 päivää left
    Varmennettu

    We are looking for a skilled developer to build a Google Drive to Google Gemini AI Connector. The goal is to create a secure, reusable application that allows querying and processing documents stored in Google Drive using Gemini’s AI capabilities. Key Features: - OAuth2-secured Google Drive integration (read-only access) - Full Google Gemini API support - RAG (Retrieval-Augmented Generation) for intelligent document processing - Web interface for user-friendly querying - REST API for programmatic acces - Support for multiple file formats: PDF, Docs, Word, Text, CSV - Reusable template to create multiple independent knowledge bases Deliverables: - Fully functional connector application - Complete, well-documented source code - Configuration files and setup instructions - Web interfa...

    €187 Average bid
    €187 Keskimäär. tarjous
    140 tarjoukset

    I need a developer who can connect the AGDC (PM USA) scan-data feed with the R.J. Reynolds loyalty program and have both flow cleanly into my existing CRM and e-commerce platform. The aim is to streamline day-to-day operations by keeping customer information, transaction details, and loyalty points perfectly in sync—no manual exports, no batch uploads, just real-time accuracy. Here is the workflow I’m picturing: when a customer purchase is scanned, the data should automatically populate our CRM record, update loyalty balances in the RJR program, and reflect the same information on the storefront side of the e-commerce system. Any change in one system must instantly show up in the others. I’m open to the underlying mechanics—REST or GraphQL APIs, middleware like Zap...

    €1844 Average bid
    €1844 Keskimäär. tarjous
    173 tarjoukset

    Fluent in English please This project is for the development of a focused AI assistant, not a generic chatbot. The goal is to create a knowledge-based financial guidance assistant that answers questions using curated materials from a book and supporting financial education resources. Please read the full project description carefully before applying. Proposals that clearly demonstrate experience with RAG (Retrieval Augmented Generation) systems and AI chat assistants will receive priority review. Project Overview I have just published my first book on Amazon and will serve as one of the primary knowledge sources used by the AI assistant. I have not applied any marketing for the book at this point as I am waiting for the completion of this project. The project is intentionally focused a...

    €3735 Average bid
    €3735 Keskimäär. tarjous
    142 tarjoukset
    Revamp Legacy App & Web Sync
    5 päivää left
    Varmennettu

    I have a small iOS / Android app that was built years ago and never truly launched. The code still compiles, yet everything—from the visuals to the underlying logic—feels frozen in time. I now run an up-to-date website and I’m ready to bring the mobile experience in line with it. Here is what I need: • Refresh the full app • Introduce modern AI-driven capabilities where they make sense (for example, personalised recommendations and smart search). • Update all workflows and data handling to satisfy today’s regulatory requirements in our sector. • Ensure design, navigation and interactive elements look and behave like the site, using current iOS and Material guidelines. • Optimise performance and codebase for the latest OS versions,...

    €469 Average bid
    €469 Keskimäär. tarjous
    326 tarjoukset

    **Custom Applicant Tracking System (ATS) – Ready Solution Available** I have developed a complete **Applicant Tracking System (ATS)** designed to help organizations manage their recruitment process efficiently. **Key Features:** • Role-based access (Admin, BDE, Team Lead, Senior Team Lead, Recruiter) • Job requirement creation and department assignment • Candidate sourcing and profile management • Multi-level candidate approval workflow (Recruiter → TL → Senior TL) • Interview stage tracking (L1, L2, Manager, HR) • Offer management and joining status tracking • Department and user management • Dashboard with recruitment progress tracking **Technology Stack:** Angular, Spring Boot, REST APIs, JWT Authentication, PostgreSQL. **Work...

    €229 Average bid
    €229 Keskimäär. tarjous
    19 tarjoukset

    I am looking for an experienced Full Stack Developer who can help integrate a third-party API into my existing web application. The application is already developed but needs to be connected with an external service so that data can be automatically exchanged and processed. The developer will be responsible for implementing API authentication, retrieving data from the external service, and storing the information in our database. The goal is to ensure a reliable and secure connection between our application and the external API. Tasks may include: • Integrating a third-party REST API into the existing system • Implementing authentication and secure API requests • Processing and storing incoming API data in the database • Creating endpoints that allow the frontend to ...

    €28 Average bid
    €28 Keskimäär. tarjous
    38 tarjoukset
    Java 8 / Spring Boot + Vue 3 Developer
    4 päivää left
    Varmennettu

    Full-Stack Developer (Java / Spring Boot + Vue 3) – E-Commerce Platform – Ongoing Contract We are very interested in developers based in Ukraine, Romania, Czechia, Slovakia, Estonia, Latvia, Lithuania, Bulgaria, Slovenia, Croatia, Hungary, Poland, Vietnam, and Taiwan. If you are located in any of these regions, your bid will have priority review over bidders in much larger nations that tend to flood freelance markets with bids. About Us We operate an e-commerce platform serving international customers. Our system is built on a decoupled front-end/back-end architecture and is currently live in production. We're looking for a reliable full-stack developer to join us on an ongoing freelance basis to help with feature development, maintenance, bug fixes, and incremental imp...

    €140 Average bid
    €140 Keskimäär. tarjous
    48 tarjoukset

    We are looking for an experienced Android developer to develop a mobile application for our warehouse operations. The application will be used by warehouse staff to scan barcodes and capture vehicle images, and then send the collected data to our ERP system via API. Key Requirements: Barcode Scanner Ability to scan barcodes using the device camera. The scanned barcode value should be captured and stored in the application. Photo Capture Users should be able to capture one or more photos of vehicles using the mobile camera. Photos should be compressed before upload to reduce data usage. API Integration The application should send the following data to our ERP system via API: Barcode number Vehicle number (manual entry or scanned) Captured images User ID / timestamp API endpoint will be p...

    €610 Average bid
    €610 Keskimäär. tarjous
    76 tarjoukset
    Java-Spring Boot-Angular Expert
    4 päivää left
    Varmennettu

    I’m spinning up a new web application and need a seasoned full-stack developer who is equally comfortable crafting Spring Boot microservices and building an elegant Angular front-end. I’m looking for someone with roughly 4–7 years of professional experience who can take features from concept to production without heavy hand-holding. On the back end you’ll design and implement REST APIs, structure the services for scalability, and keep code quality high with unit and integration tests. On the front end you’ll translate UX requirements into responsive Angular components, wire them to the APIs, and make sure everything feels fast and polished across modern browsers. A brief snapshot of what I expect you to deliver: • Modular Spring Boot services with cle...

    €501 Average bid
    €501 Keskimäär. tarjous
    56 tarjoukset
    PHP-MySQL REST API Development
    4 päivää left
    Varmennettu

    I am putting together a REST-style API built with PHP and a MySQL database. Its first job is to return user information quickly and in clean JSON, so the user endpoints should focus on efficient, well-indexed SELECT queries and clear response structures. Alongside those read-only calls, I also need a second group of endpoints for product details that can: • return existing records (GET) • add or modify items (POST / PUT) • remove items (DELETE) You are free to work with native PHP, Slim, Lumen, or a full Laravel setup—whichever will let you keep the codebase modular and easy to extend. Just keep the dependencies light and document any third-party packages you bring in. My acceptance check is simple: spin up the project, import the sample SQL I’ll provide,...

    €21 Average bid
    €21 Keskimäär. tarjous
    57 tarjoukset

    A booking management system chatbot is a virtual assistant designed to handle reservations, appointments, and scheduling directly through conversational interfaces like websites, WhatsApp, or social media. By automating the scheduling process, these bots save time, reduce human error, and provide customers with a seamless way to book services at any time of day. Core Features * Automated Scheduling: Allows users to check availability, book, reschedule, or cancel appointments 24/7 without human intervention. * Real-Time Calendar Syncing: Integrates directly with existing calendars to pull real-time availability and prevent double-booking. * Proactive Reminders: Sends automated text or email notifications to reduce no-show rates. * Payment Processing: Collects booking deposits or full pa...

    €9 / hr Average bid
    €9 / hr Keskimäär. tarjous
    75 tarjoukset

    I have a group of absolute beginners in Chennai who need to be taken from zero to productive developer in just 45 consecutive days. The focus is squarely on three pillars: • Building REST-style services with .NET Core Web API in C# (language version 9.0 or higher) • Writing clean, idiomatic Python 3 code that complements the back-end stack • Understanding relational data design and hands-on querying with MS SQL Server, PostgreSQL and MySQL All sessions must happen at our office, Monday to Saturday, and I want a balanced rhythm—short, concept-driven lectures immediately followed by guided lab work so the class can internalise each topic before moving on. What I expect from you 1. A day-by-day curriculum outline delivered before kick-off 2. Slide decks, sample...

    €1100 Average bid
    €1100 Keskimäär. tarjous
    29 tarjoukset

    I need an Android application that allows users to send and receive funds quickly, track their full transaction history, and handle multiple currencies inside a single, clean interface. Security is critical: log-in and every sensitive action must be gated by a traditional password plus a four-digit PIN flow. Core scope • Android-only build, coded in Kotlin or Java and compiled in Android Studio. • Real-time money movement between verified accounts. You may connect to an existing payment gateway or build REST endpoints; either way the transfer must settle instantly in a sandbox environment. • Persistent ledger so users can open “History” and filter by date, currency, or status. • Multi-currency wallet: balances, FX conversion at live rates, and clear...

    €274 Average bid
    €274 Keskimäär. tarjous
    91 tarjoukset

    **Project Description** We are looking for an experienced **Meta Ads (Facebook & Instagram) expert** who can generate leads for **female job recruitment** in **Arambagh, West Bengal**. **Job Details** * Position: Female Medical Representative (MR) * Location: Arambagh, West Bengal * Salary: ₹25,000 per month * Qualification: HS Pass or Graduation **Responsibilities of Freelancer** * Create and manage **Facebook & Instagram lead generation ads** * Target the right audience (Female candidates in West Bengal) * Design or optimize ad creatives if needed * Set up **Lead Form Ads** to collect Name & Phone Number * Generate **high-quality job leads** **Target Audience** * Female candidates * Age: 18–35 * Location: Arambagh and nearby areas in West Bengal **Goal** Generat...

    €69 Average bid
    €69 Keskimäär. tarjous
    9 tarjoukset

    I have a live SwiftUI-based social app that already ships chat, video feeds, stories, live scenes, an in-app currency (stars) and subscription flow. The code follows MVVM, talks to a set of REST back-ends and is in the store today. What I need now is an experienced iOS engineer who can drop into the existing project, diagnose issues quickly and raise the overall quality bar. The immediate focus is three-fold: • First, do a thorough walkthrough of the current codebase so you understand our MVVM layers, networking helpers and IAP logic. • Next, remove bugs that are spiking our crash reports and tighten up general stability. • Finally, tune performance in the chat and media areas, then layer in a handful of small feature requests we already have queued for those modules....

    €49 / hr Average bid
    €49 / hr Keskimäär. tarjous
    153 tarjoukset
    Unity Global Leaderboard Integration
    4 päivää left
    Varmennettu

    I’ve completed the core gameplay and now need a global leaderboard that plugs cleanly into my existing Unity project. The board must fetch and display each player’s name, score, and rank in real time, and add a small country flag beside the name for quick geographic context. I’m flexible on the back-end: PlayFab, Firebase, a lightweight custom REST API—whichever you feel will scale reliably without ballooning costs is fine, as long as it supports secure score submission and simple GDPR-compliant data storage. The front-end panel should match my current UI style (Unity UI Toolkit) and work on both iOS and Android builds. Deliverables: • Fully commented C# scripts for sending, retrieving, and ordering scores • UI prefab that lists name, score, rank, and ...

    €21 Average bid
    €21 Keskimäär. tarjous
    30 tarjoukset

    This is a personal automation project designed to streamline freelance opportunity discovery, project evaluation, bid preparation, and client follow-up using Python, APIs, AI tools, and workflow automation. The system monitors freelance project sources, filters relevant opportunities, analyzes project quality, estimates profitability, generates tailored proposals, and supports structured bid management. It also includes notification handling, reply tracking, and execution planning for awarded projects. Key Features: - Automated project discovery and filtering - AI-based project analysis and scoring - Smart bid calculation logic - Proposal generation and text sanitization - API integration and workflow automation - Telegram notifications and activity monitoring - Reply handling and award ...

    €498 Average bid
    €498 Keskimäär. tarjous
    150 tarjoukset
    ssgroup-shope -- 2
    4 päivää left

    I’m upgrading an existing e-commerce platform and the next milestone is a robust admin dashboard built with React, Tailwind CSS (plus the occasional Bootstrap helper), powered by a Java Spring Boot API backed by MySQL. Priority scope The public-facing site is already live, but the back-office tools are still thin. I want a dedicated dashboard that lets authorized staff control the whole store from one place. All admin routes will be secured with stateless JWT authentication. Core modules to deliver • User management – create, edit, disable users and roles • Product management – CRUD for catalog items, images, categories and inventory levels • Order tracking – view order history, status updates, refunds and fulfilment notes Technical expec...

    €21 Average bid
    €21 Keskimäär. tarjous
    24 tarjoukset
    Node.js Developer
    4 päivää left
    Varmennettu

    We are looking for a skilled Node.js Developer to join our development team. In this role, you will be responsible for building fast, scalable, and secure backend services. You will work closely with frontend developers, designers, and product managers to create reliable web applications and APIs. Responsibilities: Develop and maintain server-side applications using Node.js Build RESTful APIs and backend services Integrate databases such as MongoDB, MySQL, or PostgreSQL Optimize application performance and scalability Write clean, maintainable, and well-documented code Troubleshoot bugs and improve existing systems Collaborate with frontend developers and other team members Requirements: Strong experience with Node.js and JavaScript Knowledge of frameworks such as or NestJS Experience...

    €45 / hr Average bid
    €45 / hr Keskimäär. tarjous
    95 tarjoukset

    Freelance Full Stack Developer Required – MVP Development (Travel Tech Startup) Project Overview We are building an early-stage travel technology product aimed at improving how travelers plan journeys when direct travel options are limited. The platform will help users discover smarter travel routes and provide helpful journey insights. We are currently looking for a freelance full stack developer to build the first MVP (Minimum Viable Product) of the platform. --- Key Responsibilities - Develop a web-based MVP application - Build search functionality for travel routes between locations - Implement backend logic to generate possible journey options - Integrate relevant APIs if required - Create a clean, mobile-friendly user interface - Develop basic backend infrastructure and d...

    €252 Average bid
    €252 Keskimäär. tarjous
    105 tarjoukset

    The Workday technical consultant will design and implement scalable Workday data ingestion pipelines and provide recommendations on best practices for extracting and integrating Workday data across hyperscaler environments (Azure, AWS, or GCP). Integration Approaches Under Evaluation REST API SOAP API RaaS (Report as a Service) WQL (Workday Query Language) RaaS has been the traditional approach but is not preferred for future implementations. Key Requirements 5+ years of Workday technical experience (integrations, reporting, or data extraction). Proven experience implementing Workday data ingestion to cloud data platforms. Strong understanding of REST/SOAP APIs, RaaS, and WQL. Experience working with modern data platforms and ETL/ELT pipelines. Ability to recommend optimal ingestion strate...

    €9 / hr Average bid
    €9 / hr Keskimäär. tarjous
    4 tarjoukset
    Pharmacy Locator & Promo Portal
    3 päivää left
    Varmennettu

    I’m building a classic-looking web portal where visitors can quickly locate nearby pharmacies and, once there, browse the special promotions each pharmacy uploads. The public side centres on a postcode and distance search; users type a code or allow geolocation and see results ordered by proximity, complete with map pins and basic contact info. Behind the scenes every pharmacy will have its own password-protected area to maintain a short profile, upload time-limited promotions or evergreen deals, and decide when each offer goes live or expires. I need clean, semantic front-end code, straightforward navigation, and a back-office that even non-technical staff can use without training. Think classic layout: clear typography, familiar colour palette, no flashy animations—just a ...

    €3988 Average bid
    Salassapitosopimus
    €3988 Keskimäär. tarjous
    131 tarjoukset

    I’m ready to move my product idea from concept to a working backend and need an experienced Python developer to build a clean, well-documented RESTful API. The service will power a web and mobile interface, so stability, speed, and clear versioning matter. You’ll take charge of: • Designing the endpoint structure and data models • Implementing the API in Python (Flask, FastAPI or Django REST Framework—use the stack you’re fastest with) • Writing concise unit tests and inline docstrings • Adding basic authentication and error-handling middleware • Supplying a README with setup instructions and sample requests Must know MySQL Acceptance criteria: the project spins up locally in one command, all tests pass, and the sample calls retu...

    €15 / hr Average bid
    €15 / hr Keskimäär. tarjous
    78 tarjoukset

    I want a web-based Placement Portal that streamlines the entire campus recruitment workflow for my institute. The first milestone focuses on the Admin module, where the institute’s staff will be able to: • approve or reject company registration requests in real time, • track individual and aggregate student applications across all drives, and • generate placement reports that can be exported or viewed online. While the core of this phase centres on the Admin role, the overall architecture must leave room for company and student dashboards so we can layer in job-posting, profile viewing, application tracking, and interview scheduling later without re-engineering the backend. Key expectations • Clean, intuitive UI built with any modern frontend framework (R...

    €23 Average bid
    €23 Keskimäär. tarjous
    31 tarjoukset
    Build Complete Android EMM Platform -- 5
    3 päivää left
    Varmennettu

    I need a complete Android Enterprise Mobility Management system built from the ground up, focused squarely on device management. The platform must let me enrol, configure and oversee fleets of smartphones and tablets through a web console and accompanying Android agent. Core scope • Robust enrolment workflows (QR code, zero-touch and manual) that place devices in Device Owner mode. • Policy and configuration push—Wi-Fi, apps, restrictions—applied instantly or on schedule. • Live dashboard showing device status, compliance flags and basic audit logs. • Remote actions (lock, wipe, reboot) executed securely over the air. • Scalable back-end with REST APIs so we can integrate ticketing and reporting later. Tech expectations – Android Ent...

    €271 Average bid
    €271 Keskimäär. tarjous
    51 tarjoukset

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