
Suljettu
Julkaistu
Maksettu toimituksen yhteydessä
Job Title: Full Stack Web App Overhaul Overview We have an MVP web application already built and working. We’re looking for a skilled Full Stack Developer to overhaul the product, improve UI/UX, fix bugs, and add new features on both the frontend and backend. High Level Scope of Work 1. Landing Page Design + implement a modern, responsive landing page Clear sections for product overview, features, CTA, and contact 2. UI/UX Improvements (Existing App) Improve layout consistency, spacing, typography, and responsiveness Upgrade user flows for key actions (login/signup, navigation, core workflows) Create/refresh reusable UI components for a cleaner design system 3. Bug Fixes Across the Product Identify, prioritize, and resolve existing bugs Improve stability, validation, error handling, and edge-case behavior Provide a short bug-fix report 4. Admin Management System Build an admin dashboard to manage users and projects Admin can track which user is working on which project Features could include: assign/unassign employees, project status, filters/search, basic reporting 5. Third-Party API Integration (Backend) Integrate specified third-party APIs into the backend Secure authentication, rate-limit handling, retries, logging Expose the integration to the frontend via clean endpoints/services 6. Custom Frontend + Backend Enhancements Add new screens, endpoints, workflows as needed Ensure scalable structure and clean code organization 7. Payment Gateway Integration Add payment gateway to the existing app (Stripe/PayPal/Razorpay, etc. — to be confirmed) Webhooks handling, payment status tracking, and UI updates for users Basic security best practices around payments Deliverables Updated web app (frontend + backend) with all scope items implemented Clean, documented code with clear setup steps Admin management system fully functional Payment flow end-to-end tested (including webhook handling) Test coverage (unit/integration) Deployment support or handoff notes Expectations Strong communication and ability to work with an existing codebase Ability to propose better UX options where needed Progress updates (or milestone-based updates) Git-based workflow with PRs or clear commit history Required Skills Full stack web development experience (frontend + backend) Experience improving UI/UX in existing apps Experience building dashboards / internal tools Experience integrating third-party APIs Experience integrating payment gateways (and webhooks) Familiarity with authentication, authorization, and secure coding practices Tech Stack Node.js, Python, PostgreSQL, React, Typescript, Tailwind CSS
Projektin tunnus (ID): 40181422
98 ehdotukset
Etäprojekti
Aktiivinen 20 päivää sitten
Aseta budjettisi ja aikataulu
Saa maksu työstäsi
Kuvaile ehdotustasi
Rekisteröinti ja töihin tarjoaminen on ilmaista
98 freelancerit tarjoavat keskimäärin $645 USD tätä projektia

I can take your existing MVP and turn it into a polished, production-ready platform by overhauling the UI/UX, stabilizing the backend, and adding the missing core features you outlined. I have strong experience working inside live codebases with React, TypeScript, Node.js/Python, PostgreSQL, and Tailwind, including admin dashboards, third-party API integrations, and end-to-end payment flows with webhooks. My approach is iterative and transparent: clear milestones, regular progress updates, clean commits, and practical UX improvements grounded in real user flows. I’m comfortable owning both frontend and backend work and delivering a maintainable system your team can confidently scale after handoff.
$500 USD 7 päivässä
8,3
8,3

With over 14 years of experience as a Full Stack Developer and my broad skill set that includes Node.js, Python, Typescript, and Website Design, I believe I am a perfect fit for your comprehensive web app upgrade project. Not only will I leverage my experience in improving UI/UX but also delivering clean, scalable code organized proficiently for smoother handoffs. I have superb skills in integrating third-party APIs and am comfortable with payment gateway integration. My work doesn't just end with the successful completion of projects but also extends into ensuring clients get dedicated post-launch support. My coding style is based on security best practices and ensuring authentication and authorization systems work effectively to guarantee a smooth user experience. Importantly, my role isn't just about executing tasks but actively contributing viable ideas that enhance user experience. With my strong communication abilities and a proven ability to thrive in existing codebases, I can assure you of regular progress updates and a collaborative approach.
$500 USD 7 päivässä
8,2
8,2

Hi there, I’m ready to overhaul your MVP web app and deliver a clean, modern, and fully functional product. I can redesign the landing page, improve UI/UX across the app, fix bugs, and implement scalable frontend and backend enhancements. I’ll build a robust admin dashboard, integrate third-party APIs securely, and implement an end-to-end payment flow with webhooks. All code will be clean, documented, and structured for maintainability. Please send me a message so we can discuss the current pain points, API details, and your preferred approach for the admin dashboard and payment integration. Thanks
$600 USD 8 päivässä
7,6
7,6

Hi how are you. Yes i am ready to revamp and optimise your mvp and also ready to enhance with new feature so lets open a chatbox so we can discuss and start your work from now thanks
$250 USD 7 päivässä
6,1
6,1

Hello, I’ve carefully reviewed your scope and this is exactly the type of product overhaul I specialize in—taking working MVPs and turning them into stable, polished, and scalable production systems. I recently completed a similar engagement where I redesigned the landing page, rebuilt core UI components with Tailwind, cleaned up user flows, fixed long-standing bugs, and added an admin dashboard for managing users, roles, and projects. I also integrated Stripe with webhook handling and built several third-party API connections with proper logging, retries, and security. For your project, I will modernize the landing page, standardize UI/UX across the app, audit and resolve bugs, build a clean admin management system, integrate the required APIs, and implement a secure payment flow with end-to-end testing. The codebase will be organized, documented, and easy for your team to maintain. I can start your project immediately. Best regards, Elenilson
$350 USD 7 päivässä
5,8
5,8

⭐Hi, I’m ready to assist you right away!⭐ I believe I’d be a great fit for your project since I have extensive experience in full-stack web development, improving UI/UX in existing apps, and integrating third-party APIs. My expertise in building dashboards and internal tools aligns perfectly with your need for an admin management system. With a keen eye for detail, I can enhance the UI/UX of your web app, fix existing bugs, and integrate payment gateways seamlessly. The project will not only upgrade your product but also enhance its functionality to meet your users' needs effectively. As a seasoned developer, I understand the importance of creating a modern and responsive landing page, designing reusable UI components, and implementing clean code organization. By revamping the frontend and backend, I aim to provide a user-friendly experience and ensure the stability and security of your application. This overhaul will address your most pressing needs, enhancing the product's performance and usability. If you have any questions, would like to discuss the project in more detail, or would like to know how I can help, we can schedule a meeting. Thank you. Maxim
$250 USD 2 päivässä
5,4
5,4

Hello. We propose a complete overhaul of your existing web application, focusing on both frontend and backend improvements to enhance performance, usability, and maintainability. Our team will design and implement a modern, responsive landing page that clearly communicates your product’s value and drives user engagement. We will address UI/UX inconsistencies, improve layouts, and refresh reusable components to ensure a clean, scalable design system. Existing bugs will be systematically identified, prioritized, and resolved, with a brief report summarizing all fixes and improvements. We will build a comprehensive admin management system with user and project tracking, assignment workflows, search/filter capabilities, and basic reporting. Third-party API integrations will be implemented securely, with proper authentication, rate limiting, retry logic, and backend endpoints for frontend consumption. Payment gateway integration will be added with secure webhook handling, status tracking, and a smooth user experience. All code will be clean, documented, tested (unit and integration), and handed off with deployment support or setup instructions for future maintainability. Regards, Justin.
$500 USD 7 päivässä
5,2
5,2

Hello! I’m an experienced full stack developer with a strong background in UI/UX, API integration, and secure payment processing. I can overhaul your web app, enhance its design, fix bugs, and add new features to deliver a polished, scalable product. Let’s work together to bring your vision to life with clean, well-documented code and smooth user experiences. Ready to start immediately!
$500 USD 7 päivässä
5,0
5,0

Hey Vaibhav S. This is an overhaul of an existing working system, not a greenfield build. The goal is to stabilize the product, improve usability, and extend it in a controlled way without breaking what already works. I have worked on production web applications where UI/UX improvements, backend refactoring, bug fixing, and new feature development had to happen in parallel while keeping the system usable. In similar projects, the main risk is unstructured changes that introduce regressions, especially when payments and third‑party APIs are involved. For your application, I will first review the current codebase to understand existing flows, data models, and pain points. UI/UX improvements will focus on layout consistency, responsiveness, and clearer user flows without unnecessary redesign. Bug fixes will be handled systematically with prioritization and a short report. I will design and implement an admin dashboard for user and project management, integrate the required third‑party APIs with proper authentication and error handling, and add a payment gateway with secure webhook-based status tracking. All changes will be made with clean structure, documented setup steps, and a Git-based workflow. I can provide regular progress updates and support deployment handoff if needed. I would invite you in chat to show how I will approach and how we can make it. Let's connect to discuss. Thanks!
$550 USD 10 päivässä
4,6
4,6

Hello, there! I can overhaul your existing MVP end-to-end on the stack you listed (React + TypeScript + Tailwind, Node/Python, PostgreSQL) without disrupting what already works. I’ll start by auditing the current codebase and user flows, then ship improvements in clear milestones: a modern responsive landing page, a tighter UI system (consistent spacing/typography/components), and targeted bug fixes with a short report so you can see what changed and why. I can also build the admin management dashboard to manage users/projects, assignments, status, filters/search, and basic reporting, keeping permissions and data integrity clean. On the backend I’ll integrate your third-party APIs with proper auth, retries, rate-limit handling, and structured logging, then expose them via clean services/endpoints to the frontend. For payments, I’ll implement a secure gateway integration (Stripe preferred unless you choose otherwise) with webhooks, status tracking, and UI updates, fully tested end to end. You’ll get documented setup steps, PR-based delivery, and enough unit/integration coverage to keep future changes safe. Best regards, Ian Brown
$500 USD 7 päivässä
4,4
4,4

Hi, As an experienced full-stack developer, I have continually proven my capabilities in software application development, building and improving web applications. Having worked with reputable organizations like CGI and Pramati over the past 15+ years, I am well-versed in the multitude of tasks involved in an upgrade and overhaul like this. Your project requires enhancements on both the frontend and backend along with improving UI/UX, fixing bugs, adding new features, integrating third-party APIs, and more. I have a strong track record of delivering such comprehensive solutions efficiently. My solid proficiency in Node.js, Python, PostgreSQL, React, Typescript, and Tailwind CSS aligns seamlessly with your project's tech stack. Moreover, my extensive experience building dashboards/internal tools suits your requirement for an admin management system. In addition to solving problems and building performant systems, I always prioritize clean code organization and documentation to ensure future scalability. My portfolio consists of several successful large-scale SaaS platforms and trading applications implying my capability to meet tight deadlines while delivering remarkable results. You can rely on me not just for thorough bug-fixing but also for proposing better UX options whenever possible. Given the opportunity to work on this project, I am confident in replicating my past success to achieve your goals effectively
$500 USD 7 päivässä
4,4
4,4

With my core skills in Node.js, PostgreSQL, and Python complimented by my extensive experience in full stack web development and UI/UX improvement for existing applications, I believe I'm the perfect fit for your comprehensive web app upgrade project. I have a proven track record of creating clean, scalable codebases that seamlessly integrate with third-party APIs and payment gateways while ensuring robustness in the face of edge cases through validation, rate-limit handling and more. In addition to leveraging my expertise in React and Typescript, I bring unique perspective as an adept problem solver, which has been honed by working on various platforms such as ASP.Net Core, Laravel, Django, Flutter etc., catering to diverse client needs. I firmly believe I can enhance your user interface by implementing layout consistency, responsive design elements as well as improving user flows for essential actions. I'm excited to ensure an enhanced UX/UI royalty that'll add value and productivity at all levels of your business. Communication will be efficient and regular while deploying a GIT based workflow to show progress updates based on defined milestones. Hoping to partner with you into making your web app the best version it can be!
$500 USD 7 päivässä
4,2
4,2

Hi, how are you doing? I’d love to help overhaul your web application and bring it to a polished, fully functional state. I have experience working across full-stack projects using Node.js/Python backends, React + TypeScript frontends, PostgreSQL databases, and Tailwind CSS for clean, responsive UI. I can improve your existing UI/UX, fix bugs, build an admin management system, integrate third-party APIs securely, and implement payment gateways with webhook handling. I focus on clean, maintainable code, thorough testing, and clear documentation for easy handoff or ongoing development. I’ve successfully redesigned and enhanced MVP apps, delivering scalable dashboards, optimized user flows, and reliable backend integrations. My approach ensures that your app not only works smoothly but also feels professional and intuitive for users. Best regards, Alesha
$500 USD 7 päivässä
5,3
5,3

Hello, I have extensive experience in full-stack web development and UI/UX improvement, making me a great fit for your web app overhaul project. I’ve worked on similar projects, improving both the frontend and backend, and I am confident in my ability to deliver a clean, modern, and highly functional application. For this project, I will focus on designing and implementing a responsive landing page, improving the UI/UX of your existing app by optimizing layouts and user flows, and identifying and fixing bugs to improve overall stability. Additionally, I have strong experience building admin dashboards, integrating third-party APIs, and handling payment gateway integrations like Stripe and PayPal, ensuring secure, scalable, and well-structured code. I’ll also ensure that all new screens, endpoints, and workflows are added efficiently, following best practices and providing clear documentation. My approach includes writing clean, well-documented code, following Git-based workflows, and providing progress updates or milestone-based reports. I look forward to discussing the project further and ensuring we meet all of your needs for this app overhaul. Best regards, -Tony
$500 USD 7 päivässä
3,7
3,7

Hey there, For the admin system, do you need roles and permissions (super admin, admin, employee), or is it a single admin account for MVP? For payments, is it subscription or one time, and do you need plans, trials, invoices, and proration from day one? I can overhaul an existing Node or Python plus Postgres app without breaking what already works. The usual issues in MVP upgrades are messy UI consistency, weak error handling, and backend endpoints that are hard to extend. I fix this by first stabilizing bugs and flows, then building a small design system in Tailwind, and refactoring backend services so new features do not create more tech debt. You will get a modern landing page, improved UI and user flows, a clean admin dashboard with assignment tracking, and solid API integrations with retries, logging, and rate limit handling. For payments, I set up Stripe or PayPal with webhooks, idempotency, and clear status in the UI so you can trust billing events. I work in PRs, give regular updates, and provide a short bug fix report and handoff notes. Hope to discuss more on chat. Best, Kost
$500 USD 7 päivässä
3,5
3,5

With a decade-long experience in full-stack web development, I am well-equipped to handle the comprehensive upgrade your web application needs. My expertise in Node.js, PostgreSQL, Python, and Tailwind CSS aligns perfectly with your project requirements. Moreover, my particular strength lies in improving UI/UX in existing applications, building functional dashboards/ internal tools, and integrating various third-party APIs effectively. Having contributed to projects across Shopify, Online Marketing, CRM, and CMS platforms as well as AI-powered systems used in robotics and IoT, I comprehend the value of clean and scalable structures from the hardware level to cloud platforms. As such, I assure you of sturdy frontend and backend enhancements that do justice to your app's functionalities. Given previous experiences integrating payment gateways and deploying said systems end-to-end testing, I guarantee secure coding throughout the payment flow while keeping up with best practices. Effective communication is my priority - not only within codebase but with clients too. You can rely on me for thorough progress updates transparently using git-based workflows as per your expectations. Also being- familiar with authentication practices and working extensively in CI/CD environments allows me to ensure strong quality control over code delivered. Let my skillset and experience help transform your MVP into a polished product!
$500 USD 3 päivässä
2,7
2,7

Hello!, I am a US-based full stack developer (React/TypeScript, Node, Python, Postgres) with ~10 years of experience upgrading MVPs into stable, scalable products. I read your description carefully and the goal is clear: overhaul UI/UX, fix bugs, add an admin management system, integrate third-party APIs, and implement a production-ready payment flow with webhooks, tests, and clean handoff. I’m comfortable jumping into an existing codebase, tightening the design system (Tailwind components, spacing/typography, responsive behavior), improving key flows (auth, navigation, core workflows), and systematically clearing bugs with a short report and reproducible fixes. On the backend, I’ll implement clean service layers for API integrations (auth, retries, rate limits, logging) and expose stable endpoints to the frontend. For payments, I can wire Stripe/PayPal/Razorpay with webhook validation, status tracking, and user-facing UI updates. Can you clarify the following questions to help me understand the project further? 1. What’s the current state of the MVP (repo access, staging env, and biggest pain points)? 2. For the admin system, what roles/permissions are needed beyond “admin”? 3. What payment model is expected (one-time, subscriptions, usage-based), and which gateway is preferred? If you share the repo stack details and top 10 issues, I can propose a milestone plan and timeline. James Zappi
$500 USD 7 päivässä
2,6
2,6

Hello Client. ⏰☎️⏰ I won’t waste your time. I understand you need a full-stack overhaul of your MVP—improving UI/UX, fixing bugs, adding features, integrating APIs, building an admin dashboard, and implementing secure payment flows. ✅ My plan: I will refresh the landing page and app UI, improve user flows, fix bugs, and create reusable components. I’ll build a functional admin dashboard to manage users, projects, and reporting. I’ll integrate third-party APIs securely and implement a payment gateway (Stripe/PayPal/Razorpay) with full webhook handling. All code will be clean, documented, and tested, with setup instructions and deployment support. I have experience with Node.js, Python, PostgreSQL, React, TypeScript, and Tailwind CSS and working with existing codebases to improve functionality and scalability. I’ll maintain clear Git commits and milestone updates throughout the project. Looking forward to your invitation. Thanks.
$250 USD 7 päivässä
2,3
2,3

Hi - I went through your scope and this reads like a classic “MVP reached its limit” moment. What usually happens at this stage is the product technically works, but UX inconsistencies, fragile edge cases and missing admin tooling slow everything down. Teams then keep patching instead of fixing the underlying structure, which makes every new feature harder than it should be. My approach here would be to stabilize first, not redesign blindly. That means auditing the current flows, fixing bugs with intent, tightening UI patterns and then layering in admin management, payments and API integrations in a way that does not fight the existing app. I ve done this kind of overhaul before where the win was not visual polish, but predictability, clean boundaries and confidence to ship faster after v1.5. The goal is a product that feels boringly reliable to users and easy to extend for you as a team. If this direction aligns, we can discuss in detail in chat.
$500 USD 7 päivässä
1,6
1,6

As a seasoned team with decades of combined experience, CHARONDAJ is your one-stop shop for all things web development. Our track record of successful projects demonstrates our deep expertise in exactly the areas you specify: comprehensive app upgrades, full stack web development, and enhancing UI/UX in existing applications. Your tech stack aligns perfectly with our skill set-- from Node.js to Python, React, Typescript, and Tailwind CSS-- these are staples in our software development arsenal. At CHARONDAJ, we're more than just coders; we're passionate problem solvers. We understand that upgrading your app isn't just about fixing bugs and adding features, it's also about breathing new life into your product and improving the user experience. We pride ourselves on having a keen eye for design and an ability to propose better UX options where needed; with us, you're not just getting great code, but a great user experience as well. Throughout our engagement together, you can expect strong communication and progress updates that keep you informed at every step. We follow a disciplined Git-based workflow with PRs or clear commit history to ensure transparency and maintainability. You deserve the best possible upgrade for your web app and CHARONDAJ is committed to delivering just that: clean code, improved UI/UX via clear design and workflow improvements, bug-free operation plus added functionality like the Admin Management System and Payment Gateway Integration that will help streamline your business processes for years to come. Let's get started on transforming your MVP into a market-powerhouse!
$250 USD 2 päivässä
1,0
1,0

Sunnyvale, United States
Maksutapa vahvistettu
Liittynyt tammik. 27, 2026
₹37500-75000 INR
$10-30 USD
₹600-1500 INR
$15-25 USD/ tunnissa
$250-750 USD
$3000-5000 USD
₹1500-12500 INR
$750-1500 USD
$30-250 USD
₹1500-12500 INR
min $50 USD/ tunnissa
€20000-50000 EUR
₹600-1500 INR
$250-750 USD
₹12500-37500 INR
$10-80 USD
₹1500-12500 INR
$30-250 USD
$25-50 AUD/ tunnissa
$30-250 USD