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I am building a two-sided marketplace app that lets people in my country buy and sell anything from phones to cars, inspired by eBay and Souq. The core flow is simple: every seller is verified first, every listing follows a single information template, and once our member base hits a set threshold we will switch from free to a paid model. User onboarding & security • New users must confirm their phone number and email, then upload a government-issued ID. • Your code should talk to a national security database API (I will supply endpoints) to finish the check and store the status flag in the profile. Profiles & reputation Each profile shows ratings and reviews, social media links for extra trust, and automatically awarded seller badges once volume and rating criteria are met. Listings After a seller passes verification, the app generates a standardised “condition-report” for every item they post so buyers always see the same fields no matter what is being sold. Payments At launch I want built-in support for credit/debit cards and direct bank transfers; the architecture should leave room to plug in PayPal or local wallets later. Business logic The platform is free until an admin-set user count is reached. When that happens the system needs to flip to a fee model (in-app purchase or subscription—open to your recommendation) without downtime. Platforms & stack Native iOS and Android apps plus a web-based admin dashboard. I am flexible on frameworks—React Native, Flutter, or true native—so long as performance is solid and code is well documented. Deliverables 1. Full source code for iOS, Android, and admin dashboard 2. REST/GraphQL backend with user, listing, payment, and analytics endpoints 3. Integration of phone, email, and government ID verification flows 4. Payment gateway setup for cards and bank transfer 5. One-click switch from free to paid mode 6. Deployment scripts and brief hand-over documentation Acceptance criteria will be a working build on TestFlight/Google Play Internal Testing and successful end-to-end sale in a staging environment. If the scope is clear and you have launched similar marketplaces before, I’d like to see a quick outline of your proposed tech stack and timeline.
Project ID: 40448124
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272 freelancers are bidding on average $740 USD for this job

Hi there, Jas this side from Logictrix and I am ready to work on your app with my team and with a promise for long term support in fairly low cost. Please just give me your few minutes for the chat so that we can discuss all the important points about project as well as we can clarify any queries from both side to go ahead further for final agreement. We will use AI tools to developed your app very quickly and so in cheapest cost as we are expert in AI development and we used many AI platforms like openAI, Freepik, Antigravity, Cursor etc for App development and other AI work. We have developed around 400+ Android and iOS apps using Native and Flutter SDK in the past 15 years, Many apps are Live in Google play and App store. We will share our detailed portfolio over the Chat once we connect. Looking forward to your reply... Thanks and Regards Jas
$500 USD in 7 days
9.7
9.7

Drawing from my extensive experience as a trusted web and app developer, my team at CnELIndia is uniquely equipped to bring your vision of a dynamic marketplace app to life. We have successfully delivered numerous projects driven by similar complex user-onboarding, security, and payment requirements. Our skills in MySQL, PHP, and particularly React Native align seamlessly with what you're looking for. Moreover, as seasoned professionals in creating two-sided platforms, we have a clear understanding of challenges that can arise and a proven ability to devise reliable solution. From the initial verification process to the generation of standardized listing reports, we are well-versed in tackling all the key aspects you have outlined. When it comes to meeting deadlines and delivering end-to-end solutions adhering to comprehensive acceptance criteria, CnELIndia thrives. We’ll ensure not just a fully functional app on TestFlight/Google Play Internal Testing, but also a well-documented deployment process and seamless integration of every aspect of your platform. Let us bring our unique combination of skill, efficiency, and passion for innovation to make your marketplace app business vibrant and successful!
$500 USD in 7 days
9.0
9.0

Hi - Elias here from Miami. The primary technical challenge in developing a two-sided marketplace app lies in managing real-time interactions and ensuring data consistency across multiple users. This involves a robust architecture capable of handling fluctuating loads, especially during peak times when simultaneous transactions occur. Common pitfalls include inadequate database design leading to performance bottlenecks, or failure to implement effective caching strategies. Many systems struggle with race conditions, especially when transactions modify shared resources. A well-structured REST API can mitigate these issues but requires careful design to ensure reliability. I propose an architecture based on microservices, which allows for scaling individual components independently. This would involve an initial setup with a PHP backend and a mobile front-end using React Native or Flutter, ensuring cross-platform compatibility. Implementing WebSockets could also enhance user experience by providing real-time updates on transactions. Critical to this approach is early decision-making around data consistency models—choosing between eventual consistency versus strong consistency will have long-term implications on system behavior and user experience. What specific user interactions do you anticipate will require real-time updates? Looking forward to discussing this further.
$500 USD in 5 days
8.5
8.5

Hello, Two-sided marketplace App that lets people in my country buy and sell anything from phones to cars, inspired by eBay and Souq. I have similar kind of expertise and work experience. I have gone through your requirements and understand that you are looking for highly skilled, qualified, and experienced (Android & iPhone /ipad) Mobile App with development API web services where admin can manage the app from backend development I would approach your project by starting with wireframes and getting the UI/UX design completed, before starting the actual development phase. We'll provide You high Quality Design and development for you with unlimited changes in design. ++++++Service Guarantee++++++ ➥ Designed app Android iOS admin panel. ➥ Optimized code and well commented on use for future. ➥ All the latest code to support all versions of Android and iOS phone devices. ➥ Launched the app on Google Play Store as well as Apple App Store. ➥ Setup servers, hosting your app and create a database. ➥ Free support and maintenance. ➥ Multi language support. ➥ 24*7 hours live support. ➥ daily weekly meeting I am available on desk as per your convenient time zone and will work on your project until you satisfied with my work. Awaiting for your positive response. Thanks christina
$494 USD in 9 days
8.4
8.4

With experience in marketplace app development, I understand your need for a secure platform with verified sellers, standardized listings, and payment options. I have integrated similar security measures and standardized templates in past projects. How crucial is it for the platform to handle a high volume of transactions seamlessly? Regards, Yogesh Kumar
$430 USD in 9 days
8.4
8.4

Hi, I specialize in developing marketplace apps with a focus on user security and streamlined processes. I have experience integrating verification systems, building robust user profiles, and implementing payment gateways seamlessly. My proposed tech stack would include React Native for cross-platform functionality, ensuring high performance and scalability. I can deliver clean, well-documented code for iOS, Android, and the admin dashboard, along with seamless integration of verification flows and payment gateways. Let's discuss further to align on the technical approach and timeline for your project. Looking forward to collaborating with you.
$350 USD in 3 days
8.3
8.3

Hi there, I am leading a team of senior mobile, backend, and marketplace platform developers and would like to work for you as per your requirements. I am really interested to start this project for you. We have strong experience building scalable marketplace ecosystems with user verification, payment integrations, admin dashboards, rating systems, and mobile applications, and we can develop your two-sided buying/selling platform with secure onboarding, government ID verification API integration, standardized listing workflows, seller reputation systems, flexible payment architecture, and a configurable free-to-paid business model across iOS, Android, and web admin platforms. We would recommend a scalable stack such as Flutter or React Native for mobile apps, Node.js/NestJS for backend APIs, PostgreSQL for structured marketplace data, and a React-based admin dashboard to ensure maintainability and future scalability. Could you please confirm whether the government verification API already has technical documentation available and whether you prefer subscriptions or transaction fees once the paid mode activates? I would like to discuss in detail. Kindly drop me a message and discuss more with me. Thanks
$400 USD in 8 days
8.3
8.3

Hi, As an experienced Full-Stack and Mobile App Developer with deep proficiency in PHP, MySQL, React Native, and Flutter, I bring a unique blend of skill set perfectly tailored to your Marketplace App Development project. My extensive experience spans over 15 years and includes building web platforms, business applications, API integrations, server-side systems, and more. Moreover, my comprehensive understanding of core technologies such as MERN stack, LAMP stack, and Python positions me well to handle the diverse demands of your project. In line with your project description's steadfast emphasis on user security and seamless onboarding experience, my expertise in creating secure logins flows, implementing authentication systems, and incorporating real-time web integrations will be invaluable. I recognize the criticality of linking software with databases, APIs, devices effectively for projects like yours - for this reason, I maintain robust reliability trainings like VPN and Firewall to optimize the system. When it comes to marketplace platforms, trust can make or break your platform. With me on board, you get not only highly scalable apps but also a solid reputation system which automatically awards reliable sellers with badges for extra trust. Furthermore, I am proficient in both REST and GraphQL backend development - ideal for managing data efficiently across multiple devices - which encompass strong user management capaciti Thanks!
$250 USD in 10 days
8.2
8.2

Hi, I understand you need a Full-Stack Software Engineer to build a two-sided marketplace app for buying and selling items, inspired by eBay and Souq, with native iOS/Android apps plus a web admin dashboard. I can build the Complete Marketplace MVP with user verification, profiles & reputation, standardized listings, payment flows, and free-to-paid mode switch. I will implement Native iOS/Android apps + web-based admin dashboard with core marketplace architecture. User onboarding, government ID verification, social reputation, and seller badges. Standardized listing templates, condition reports, and secure payment flows (cards + bank transfer). Business logic for free-to-paid switch, analytics endpoints, and admin controls. REST/GraphQL backend with phone/email verification, listing management, payment integration, and scalable architecture. I have experience building this with social and marketplace MVPs featuring secure verification, listing standards, and integrated payment flows. Here You Can Check My Professional Portfolio: https://www.freelancer.com/u/Hammadhassan21 Let's connect with me chat to discuss more about your project. Best Regards Hammad.
$500 USD in 7 days
7.9
7.9

Hello, Greetings Hope you are doing well. I am a Mobile Application developer with over 5 years of experience. I am confident in my ability and skills to develop high-quality Mobile apps and would like to work on your marketplace app project. I will complete the work as per your requirements. I want to discuss more this project to prepare the final concept. So let’s discuss this in detail over chat then will make plans to start work on it. Waiting for your earliest reply. Thanks. Shubham
$250 USD in 14 days
8.0
8.0

⭐⭐⭐⭐⭐ Create a Two-Sided Marketplace App for Buying and Selling ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and noticed you're looking for a developer to create a two-sided marketplace app. You have no need to look any further; Zohaib is here to help you! My team has completed 50+ similar projects for marketplace apps. I will ensure a smooth user onboarding process, implement secure verification, and design a user-friendly interface. ➡️ Why Me? I can easily build your marketplace app as I have 5 years of experience in mobile and web app development. My expertise includes API integration, user authentication, payment processing, and database management. Not only this, but I have a strong grip on React Native, Flutter, and native development, ensuring high performance and well-documented code. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing with you in chat. ➡️ Skills & Experience: ✅ Mobile App Development ✅ Web Development ✅ API Integration ✅ User Verification ✅ Payment Gateway Setup ✅ Database Management ✅ React Native ✅ Flutter ✅ iOS Development ✅ Android Development ✅ User Interface Design ✅ Security Protocols Waiting for your response! Best Regards, Zohaib
$350 USD in 2 days
7.8
7.8

HARDWARE AWARE IDLE ENGINE: FLUTTER ECOSYSTEMS WITH SECURE THERMAL CONTROLS To clear app store compliance hurdles while protecting user hardware, we will isolate the optional mining logic into a sandboxed background thread controlled by native telemetry hooks. At Plan D Studios, we bring 12+ years of in house experience in Mobile App Development and Game Development, specialized in low level native bridges and secure SaaS data ledgers. Our Architectural Blueprint & Concept Improvements: App Store De risking: Instead of running heavy on device proof of work that triggers marketplace bans, we recommend your app act as a lightweight cloud pool hashing coordinator over WebSockets. Thermal Throttling: We will write native platform channels in Flutter to read CPU temperature and charging registers dynamically. The system will auto kill background processes the second thermal limits are breached. Anti Cheat Progression: Offline progression formulas will use server authoritative time delta validation on our Node.js and PostgreSQL stack, rendering device clock manipulation useless. The Team: 100% in house execution with 1 Backend Architect, 2 Mobile Devs, and a Dedicated QA. Let's unpack timelines and budget ranges on a technical sync. Will your future physical hardware connect via Bluetooth Low Energy (BLE) or local Wi-Fi TCP sockets? Regards, Haider
$850 USD in 10 days
7.5
7.5

Hello, Your marketplace platform is a highly ambitious and scalable product, and it aligns perfectly with the type of marketplace ecosystems we build at Doomshell. We understand this is much more than a buy/sell app — it’s a trust-driven platform focused on verified users, secure transactions, and long-term monetisation. For this project, we’d recommend: ✔ React Native for iOS & Android apps ✔ React.js admin dashboard ✔ Node.js/FastAPI backend with REST/GraphQL APIs ✔ Scalable cloud infrastructure with modular architecture We’ll focus heavily on security, performance, and scalable architecture so the platform can grow smoothly as your user base expands. Deliverables: • Full source code (iOS, Android & admin dashboard) • REST/GraphQL backend APIs • Payment & verification integrations • Deployment scripts & technical documentation • TestFlight & Google Play staging builds Why Doomshell? • Strong marketplace & scalable backend expertise • Experience with verification & payment workflows • Modern React Native & API-driven architecture • Clean, maintainable code standards • Long-term support & scaling availability A few quick questions: 1. Which payment gateways and bank APIs are available in your country? 2. Will the government verification API return live approval/rejection responses or async verification statuses? Regards,
$730 USD in 5 days
7.5
7.5

Hi! I can help you with building this two-sided marketplace. The verified seller flow with government ID checks, standardized condition reports, and the free-to-paid flip are all things I've handled in similar apps before. For stack I'd suggest Flutter for both mobile apps since it gives you native performance with a single codebase, Laravel for the backend API, and a React admin dashboard. The threshold-based monetization switch can be a simple admin flag that triggers without any downtime. I'm Edward, been building mobile apps for over 10 years including marketplace platforms with escrow payments and seller verification. Let me know if you want to discuss the timeline and architecture in more detail.
$750 USD in 7 days
7.6
7.6

Hi, I will develop the marketplace app using Flutter and Laravel. I am developing applications since 2019. I would like to discuss the requirements through chat. Thanks
$500 USD in 7 days
7.2
7.2

I can build a secure and scalable marketplace platform similar to eBay/Souq with verified sellers, standardized listings, integrated payments, reputation systems, and a smooth cross-platform experience for iOS, Android, and web admin. I recommend Flutter for mobile apps and a scalable Node.js/NestJS backend with PostgreSQL to support realtime verification workflows, payment integrations, analytics, and future expansion into subscription or commission-based monetization. The platform will include: • Phone, email, and government ID verification • National security database API integration • Seller ratings, reviews, badges, and trust profiles • Standardized condition-report listing system • Card and bank-transfer payment integration • Admin-controlled free-to-paid business model switch • Admin dashboard for moderation, analytics, and payments The architecture will be optimized for security, scalability, fast API performance, and future payment/provider expansion without downtime. You will receive complete source code, deployment scripts, staging/production setup, and technical documentation with production-ready TestFlight and Google Play builds. Looking forward to discussing your verification workflow, payment setup, and rollout timeline in detail.
$500 USD in 7 days
7.1
7.1

Hello Marketplace scaling requires complex matching logic. Slow performance kills conversions. Built similar two-sided platform using React/Node.js. Optimized database queries reduced latency 40%. Scalable architecture ensures smooth transactions between buyers, sellers. View GitHub repo for architecture samples. Available now for technical discovery call. Send project requirements. Giáp Văn Hưng
$420 USD in 7 days
6.7
6.7

Glad to be here, I will build your complete two-sided marketplace platform with secure seller verification, standardized listing flows, scalable payment architecture, native-feel mobile apps, and a powerful admin dashboard designed for smooth transition from free to paid monetization without downtime. Professionally, I would recommend Flutter or React Native with a robust REST/GraphQL backend for synchronized iOS, Android, and dashboard operations while integrating phone/email verification, government API checks, seller reputation systems, payment gateways, analytics, and scalable business logic with clean documented code. Do you already have the government security API documentation and preferred payment gateway providers ready for integration planning? Portfolio:https://www.freelancer.pk/u/zainalitariq245 I would love to discuss the architecture, timeline, and long-term scaling strategy for this marketplace project. Best Regards: Zain Ali
$400 USD in 10 days
6.8
6.8

Hello, With 4 years of experience in React Native, Mobile App Development, PHP, iOS Development, and REST API, I am well-equipped to handle your Marketplace App Development project. I understand the requirements outlined, including user onboarding, security measures, profile reputation management, standardized listings, payment options, business logic, and deliverables. I have thoroughly reviewed the project details and am confident in my ability to deliver a professional solution. My expertise in PHP, Mobile App Development, Android, MySQL, iOS Development, React Native, Flutter, and REST API aligns well with the project requirements. I invite you to connect in chat to discuss this project further. I am open to discussing any details, including the proposed tech stack and timeline. Best regards, Taimoor from Pixels Soft Please connect in chat for further discussion.
$500 USD in 7 days
6.7
6.7

Hello, I understand you're building a two-sided marketplace app to connect buyers and sellers locally, which requires seamless user experience and secure transactions. A key challenge is managing real-time updates and ensuring smooth cross-platform performance on mobile devices. Our team excels in Flutter for cross-platform apps and Laravel for robust backend APIs, exactly what your project needs. You can check samples from our work at https://www.freelancer.com/u/eliaa. Looking forward to hearing from you. Best Regards, Elia Fawzy.
$675 USD in 7 days
6.9
6.9

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