Multivendor E-commerce Mobile/Web App Development

@infowider11

*** Lean Multivendor Marketplace MVP (Under $100K, Scalable Foundation) **** I will build your marketplace as a clean, cost-efficient MVP using Flutter (mobile) + React (web) with a single Node.js (NestJS) backend and PostgreSQL, exactly aligned with your architecture. Core delivery includes the toggle-based marketplace (Brand New / Second Hand), product posting, browsing, vendor/user roles, image uploads, and direct call-to-seller flow. • Toggle-based marketplace (switch between Brand New & Second Hand listings instantly) • User roles: Buyer (normal user) and Vendor (with basic shop profile/KYC) • Product listing system (upload images, title, price, category, condition, location) • Product browsing & search with clean product cards (image, price, location, condition) • Direct contact flow (call seller from product page) • Image storage via cloud bucket with optimized loading • Mobile app (Flutter/React Native) + responsive web (React) • Secure authentication (login/signup, password hashing, SSL) • Basic admin panel (manage users, listings, moderation) Let’s chat… Thanks

@shyamvijaywargiy

Hello , Nice to meet you! I will design and develop Multivendor E-COMMERCE mobile application with web admin panel according to your requirement , ping me on chat so we can discuss this more. I am expert and 9 years experienced Android /iPhone app developer with backend work that you are looking for. I will provide you perfect product as you want so you would be happy with it. I am always ready to discuss about your project in detail as well as start from right now. The following are my services that i provide :- 1. Daily or Weekly update. 2. Clean and Robust code. 3. Responsible for communication for more than 15 to 20 hours each day. 4. Free Bug-Fix support for 1 year after completion. 5. Source code delivery. You can have a look at my profile by this link : https://www.freelancer.com/u/shyamvijaywargiy Let's contact me to discuss further details with me. Thanks Shyam

@n2rtechnologies

Hi, You're building a multivendor marketplace app—straightforward, scalable, vendor-friendly. Before we dive in: are you leaning mobile-first (Flutter) or web-first, and do vendors need real-time inventory sync? That shapes the whole architecture. Let's talk details. Best Regards, Hasan

@mrresearcher99

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert

@sabaehsan

Greetings, I appreciate the opportunity to work on your multivendor e-commerce mobile and web app. You’re looking for a straightforward platform that allows both vendors and users to list and browse products, which is clear from your specifications. My approach would be to create a clean and efficient single backend system using Node.js, with PostgreSQL for the database to manage user and product data seamlessly. With a toggle feature for brand new and second-hand items, I’d ensure the user experience is intuitive and straightforward. Utilizing either Flutter or React Native for the mobile app would help in achieving a smooth interface. I’m also focused on keeping costs low while ensuring the system is scalable for future enhancements like chat or payment options. I look forward to the possibility of collaborating on this exciting project. Best regards, Saba Ehsan

@iosifpeterfi

I'm Iosif Peterfi, 15+ years helping businesses turn ideas into solid, scalable digital platforms from Berlin. I want simple app store, here you can study my plan. And please bid only those who are interested to work under 100k. Infrastructure for my Multivendor E-Commerce Platform that supports: - Brand New (vendors) - Second Hand (users) - Toggle-based marketplace - Minimum cost, - scalable later 1. SYSTEM OVERVIEW Mobile App / Web App ↓ Backend API Server ↓ PostgreSQL Database ↓ Image Storage (Bucket) - Single backend (no microservices) - Clean, low-cost, scalable base 2. TECH STACK Frontend - Mobile App: Flutter or React Native - Web: React Backend - Node.js (Express or NestJS) Database - PostgreSQL Storage - Cloud Storage (images) Hosting - Google Cloud Platform CDN - Cloudflare 3. CORE LOGIC (IMPORTANT) Marketplace Toggle (MAIN FEATURE) At top of app: [ Brand New ] [ Second Hand ] Behavior: - Brand New → show vendor products - Second Hand → show user listings This maps directly to my experience. This is my speciality. 4. BASIC SECURITY - HTTPS (SSL) - Password hashing - Admin panel (basic) - Daily DB backup 5. FINAL SUMMARY (FOR DEVELOPER) Build a simple marketplace app with: - Single backend (Node.js) - PostgreSQL database - Image storage bucket - Toggle system: - Brand New - Second Hand - User types: - Normal user - Vendor - Basic product posting + browsing - Contact via phone

@mobiappsoftware

Hello, I will develop your MULTIVENDOR E-COMMERCE MOBILE APPLICATION for Android and IOS both platforms with Web admin panel. I am Tulsiram. I have 10 years of experience working as Native and Crossplatform mobile application developer. I am understood your requirements. I am glad if we are working together. If you interested then let's connect. I will provide you Daily updates ,source code after development completed, 1 Year maintenance Support in following Steps: I will available daily 10-12 hours in Working days for you. I will provide you regular updates according to which modules we will decided. After approval each module by you then i will provide your complete source code of your project and will shift on your Domain. Thanks

@Herculesz

Hi, I have solid experience building scalable marketplace apps with React, React Native/Flutter, Node.js, and PostgreSQL, and your architecture is well-aligned for a cost-efficient MVP. The key technical challenge is designing a clean single-backend system that supports dual marketplace logic (Brand New vs Second Hand) without creating performance or data complexity issues. My solution is to implement a unified product model with indexed listing_type and condition fields, optimized queries, and clear API separation for fast filtering and scalability. I will build a lightweight Node.js (Express/NestJS) backend with REST APIs, secure authentication, and efficient image handling via cloud storage. The frontend will be responsive and minimal, focusing on fast browsing, toggle-based filtering, and smooth product posting flows. I will also ensure PostgreSQL optimization (indexes, relations) and prepare the codebase for future features like chat and payments without refactoring. My past work includes similar marketplace systems with scalable foundations and clean deployment on cloud platforms. Thanks, Hercules

@zainalitariq245

I will also provide you 3 month of free post launch after including bug fixes and maintenance to ensure everything runs smoothly also your project is a great match for my skill set ican provide an efficient scalable and well structured solution that meets your needs. Hi, Ready to begin today and finish asap, I saw your project about Multivendor E Commerce Marketplace App and I can build a clean, low cost, and scalable platform exactly as you outlined. I will create a single backend with Node.js, PostgreSQL database, and cloud image storage, supporting both brand new vendor products and second-hand user listings with a simple toggle. The app and web interface will be intuitive, with clear product browsing, posting, and basic user/vendor flows. I have strong experience in Flutter, React Native, and React with Node.js backends, and I focus on building maintainable, future-ready platforms that can scale later without a full rebuild. NOTE: I have carefully gone through your project details and can assuredly deliver what you require. Kindly review my portfolios, https://www.freelancer.pk/u/zainalitariq245 Looking forward to discussing your project further. Best Regards, ZAIN A...

@ixorawebmob

Hello, I’ve gone through your project details, and I am excited about the opportunity to help you develop a multivendor e-commerce platform. With over 10 years of experience in mobile and web app development, I specialize in creating scalable solutions using technologies like Flutter, React Native, and Node.js. My focus is on clean architecture and user-centered design to ensure your marketplace is both functional and efficient. I will utilize a single backend system and PostgreSQL to maintain a streamlined, low-cost infrastructure tailored to support both brand new and second-hand product listings. Keeping your goal of scalability in mind, I will build the system to allow future enhancements without major rework. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m interested in more details to ensure the best approach. Could you clarify: 1. Do you need this for mobile, web, or both? Let’s discuss over chat! Could you clarify if you need this for mobile, web, or both? Regards, Arpit Jaiswal

@Curveballsol

Hello, I have thoroughly reviewed your project requirements for the development of a Multivendor E-commerce Mobile/Web App. I understand the need for a simple yet scalable platform that supports both brand new vendors and second-hand users through a toggle-based marketplace. With expertise in PHP, Mobile App Development, Web Development, Node.js, Flutter, MySQL, and PostgreSQL, I am well-equipped to deliver a robust infrastructure for your e-commerce platform. Effective communication will be maintained throughout the project to ensure your vision is accurately implemented. Please find my portfolio for reference: https://www.freelancer.com/u/Curveballsol Best regards, Curveball Solutions

@manojmalviya93

Hi, I read through your project description for a Multivendor E-commerce Mobile/Web App and I am confident that I can assist. Utilizing my expertise in Mobile App Development, Web Development, APIs, Flutter, and JavaScript, I can assure that we can achieve a simple app store as per your vision. With my solid background in Cloud Computing, Network Security and API Integration, I can ensure a secure and robust infrastructure for your E-commerce platform. And I am quite versatile with various database management systems, providing flexibility in managing app data. I've completed many similar projects to what you're looking for and I believe your project fits well within my wheelhouse. I'm eager to start and look forward to your response. Thank you.

@kishanbwts

Your plan to build a lean multivendor app with a toggle for brand new and second hand items fits well into a single backend setup using Node.js and PostgreSQL. I’ve delivered similar projects where keeping costs low without sacrificing scalability was key. For example, a client in retail had a dual marketplace with different seller types and toggle filters, and this same tech stack worked well to keep the app responsive and simple. I’ll implement the toggle exactly as described, fetching from either vendor or user listings based on selection. For image storage, using a cloud bucket linked to products ensures scalable and cost-efficient handling. I’d confirm your preference for Express or NestJS for the backend framework to align with your team’s comfort. Since you want to keep this base simple for now, I suggest a clean API design that’s ready for future additions like chat and payments without major rewrites. Also, should we consider indexing key fields like user_type and listing_type now for faster toggle queries? I can start working on building your platform within the $100k budget and deliver the core experience efficiently. Ready to get started when you are.

@webnsoftindia

---- Simple Multivendor Marketplace App MVP --- I can build your budget-friendly, toggle-based marketplace for both mobile (Flutter/React Native) and web (React) under the $100k budget, with a clean, scalable architecture as per your plan. Key Features: Brand New / Second Hand toggle at top of the app, filtering products dynamically. User types: Vendors and normal users with basic registration, authentication, and profile handling. Product management: Vendors can post products with images, category, price, condition, location, and toggle selection. Buyer flow: Browse, search, toggle products, view product details, and contact seller via phone. Thanks

@DigitaSyndicate

Your project runs a high risk of feature entanglement compromising both the toggle logic and the consistent display of listings, especially given the unified backend approach with Node.js and PostgreSQL. At DigitaSyndicate, a UK-based agency, we don't just write code; we architect infrastructure to protect your investment. Our local accountability ensures the bespoke infrastructure meets British standards for data integrity and security while maintaining cost efficiency and scalability on Google Cloud with Cloudflare CDN. Have you considered how atomic the toggle switch transactions will be and how your backend logic manages concurrency to prevent conflicting views between brand new and second hand listings under load? Casper M. DigitaSyndicate

@mughiraaa

Hello, I have reviewed the details of your project. i will create a single backend server using node.js with express to handle api requests and data logic, connect a postgresql database to store users, products, images, and vendor profiles, and use cloud storage for images. the mobile app will be developed in flutter for cross-platform support, while a simple web version will use react. the toggle system for brand new and second hand products will control what listings are shown on the home screen. i will ensure users and vendors can register, post products with images, and browse listings with search and filter options. ssl will secure all connections, passwords will be hashed, and a basic admin panel will manage users and products. Let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira

@CodeAnchors

Hello, I have carefully reviewed your project description for the development of a Multivendor E-commerce Mobile/Web App. With expertise in PHP, Mobile App Development, MySQL, Node.js, PostgreSQL, AngularJS, Web Development, and Flutter, I am confident in delivering a high-quality solution tailored to your specific requirements. I understand the importance of creating a simple yet scalable platform that supports both brand new vendors and second-hand users through a toggle-based marketplace. My experience in developing seamless mobile and web applications, along with a strong command of the specified tech stack, makes me a suitable candidate for this project. In my portfolio, you will find successful projects showcasing my proficiency in creating efficient and user-friendly applications. Before proceeding, I would like to discuss further details to ensure a smooth finalization of the project scope. Looking forward to the opportunity to collaborate and bring your vision to life. Best regards, Muhammad Anas Khan ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐

@mayankinnovative

Hi, As per my understanding: You want to build a low-cost, scalable multivendor marketplace with a toggle-based system (Brand New vs Second Hand), supporting vendors and users, with core features like product listing, browsing, and direct contact—while keeping the architecture simple and future-ready without advanced modules initially. Implementation approach: I will develop a clean MVP using React (web) and Flutter/React Native (mobile) with a single Node.js (Express/NestJS) backend and PostgreSQL. Core modules include user/vendor auth, product listing with toggle logic, image upload via cloud storage, and basic admin panel. I’ll design normalized schemas (as outlined), optimize APIs for performance, and implement secure practices (JWT auth, hashing, HTTPS). UI will follow your minimal flow with fast navigation. The system will be modular so future features (chat, payments, scaling) can be added without refactoring. Deployment will use GCP + Cloudflare CDN with backup setup. A few quick questions: 1. Do you want mobile + web both in Phase 1 or start with one? 2. Preferred cloud budget/month for infra? 3. Should admin panel include listing moderation? 4. Any reference apps for UI/UX expectations?

@santoshkumars17

Being an experienced full stack developer with over 5 years of versatile experience in web and mobile app development, I believe I am the best candidate for your project. My work, time and again, has been focusing on building efficient, scalable and user-friendly applications like what you described in your project description. Throughout my career, I have worked with a wide array of technologies including but not limited to React Native for mobile apps, Flutter for cross-platform development and Node.js for backend development perfectly aligning with what you require. Moreover, I have a comprehensive skill set in API integration along with database management which would be crucial for the smooth functioning of the core logic in your project. Additionally, my proficiency in implementing performance optimization techniques will further aid in maintaining a cost-effective and scalable platform. My clients have always appreciated my clean and maintainable code, adherence to timely delivery and clear communication throughout the project phases. Not only do I build powerful applications but also provide thorough end-to-end development support ensuring that you have a seamless experience even after the completion of the project. If you are looking for someone passionate about turning ideas into reality through code, let's join hands and create something amazing together!