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We are looking for an experienced full-stack MERN developer with OpenAI, agentic development, React Native and UI design experience. Our website is approximately 97% complete. The existing code is already in GitHub, and you will work directly in our repository to finish the website. You will then redesign and upgrade our React Native app with the missing website features. Main work - Complete the payout and withdrawal features using the Stripe, Wise and PayPal APIs, including an admin review and approval flow. - Update the help sections and their AI agent, including its OpenAI integration. - Complete the documented feedback and website footer. - Fix any issues that arise and complete the remaining frontend, backend, user and admin functionality. - Adapt the website’s mobile version and improve its responsiveness across phones, tablets and desktop screens. - Deliver a fully functional website with working payment integrations. - Redesign and upgrade the React Native app with the new website features and name. - Migrate our customers from another website to the new site after completion. - Provide **eight months of post-launch support**. - Editing such as content . colour adjust, UI if required. - Since this is completing nearly completing project, you should be able to do anything found missing in the doc. We will provide website designs and UI mock-ups where needed. Your primary task will be to implement them accurately in code. Some features may first be built in Lovable; you will need to review that code, adapt it where necessary and integrate it into the existing project. All development must be carried out in our existing GitHub repository, with changes committed there. Requirements - Proven experience with React.js, Node.js, [login to view URL] and MongoDB. **Portfolio or live project links are required.** - Hands-on experience with the OpenAI API and agentic development, including AI agents that can use tools, follow multi-step workflows and integrate with application data. - Strong understanding of RESTful APIs and familiarity with MySQL. - Experience with e-commerce platforms, shopping carts and payment gateways such as Stripe and PayPal. Wise payout experience is particularly relevant. - Experience developing React Native apps. - Strong responsive design and cross-browser compatibility skills. - Ability to work within an existing GitHub codebase and make meaningful commits. - Ability to work independently, meet agreed deadlines, communicate clearly and pay close attention to detail. - Flexibility to adapt when unforeseen tasks or issues arise. Nice to have - Experience with TypeScript, [login to view URL] or GraphQL. - Knowledge of AWS, Docker or CI/CD pipelines. - UI/UX design experience or familiarity with Figma. Deliverables - A Production-ready MERN optimised completed website with working frontend, backend, user and admin features, adapted for mobile, tablet and desktop. - An upgraded help section and working AI agent. - Updated React Native app published to TestFlight / internal testing track, Appstore and Google play with the new site features fully integrated • Short hand-off document outlining setup, environment variables, and deployment steps - Customer migration to the new site. - Updated source code in our existing GitHub repository with meaningful commits. - Documentation covering setup, maintenance and deployment. - Eight months of post-launch bug-fix support. To apply, please share links to relevant MERN, e-commerce, React Native and OpenAI projects. Describe any Stripe, Wise or PayPal integrations and agentic applications you have built. Explain how you would assess the existing codebase and customer migration before providing a timeline and quote, and confirm that you can provide eight months of post-launch support ** New Freelancer is welcome**
Project ID: 40734726
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I’ve completed MERN marketplaces with Stripe/PayPal payment workflows, OpenAI support agents, and React Native companion apps, including admin-controlled transaction flows. For this project, the key is auditing the existing GitHub codebase and payment states first, because safe payouts and a reliable customer migration depend on clear data ownership and approval rules. I’ll finish the React, Node/Express, MongoDB, and admin functionality, integrate Stripe, Wise, and PayPal withdrawal review flows, and adapt the AI help agent to use application data and multi-step tools. I’ll implement the supplied UI accurately across breakpoints, review Lovable output before merging it, and make meaningful commits. Before quoting a timeline, I’ll assess repository health, schemas, integrations, migration volume, and rollback needs. I can provide eight months of post-launch bug-fix support. Thanks, Kittipong
$2,000 USD in 10 days
3.1
3.1
553 freelancers are bidding on average $1,657 USD for this job

Hello — I would start with the payout and withdrawal flow in your GitHub repo: Stripe, Wise, PayPal, and admin approval, because that is the highest-risk part and it drives both user and admin completion. In parallel, I would audit the OpenAI help agent, the remaining MERN gaps, and the React Native app so the final website, mobile upgrade, and customer migration follow one backend logic. - I will review the repo and turn gaps into a commit-by-commit plan. - I will complete payouts, approvals, and edge-case handling. - I will finish responsive web screens from your provided mock-ups. - I will upgrade the React Native app to match final site flows. I can work fully in your existing repository, adapt Lovable output where needed, document setup and deployment, and provide the eight months of post-launch bug-fix support. I can begin with the code audit and payment flow mapping. Is the customer migration coming from another custom site or a platform? Roman
$2,300 USD in 14 days
9.6
9.6

Hi — Elias here from Miami. I understand you’re looking to enhance your website and upgrade your React Native app using the MERN stack, focusing on OpenAI integration. This is an exciting opportunity to build a product that truly resonates with users. What usually matters most here is ensuring the system remains scalable and maintainable as user demands grow. A common issue in projects like this is managing complex workflows and integrations, which can lead to reliability challenges if not addressed early. My approach involves structuring the application for clarity, using modular components for easy updates and future expansion. I focus on creating a robust backend with Node.js and MongoDB while ensuring the React front end is efficient and responsive. I have experience with similar projects, developing scalable applications that leverage AI for enhanced user interactions. This background helps me foresee potential pitfalls and address them proactively. A few questions to better understand the scope: Q1 – What specific user roles and permissions do you envision? Q2 – Are there existing integrations that need consideration? Q3 – What are your scaling expectations in terms of user growth and features? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$2,000 USD in 9 days
8.1
8.1

Hi, I can help take your existing MERN platform from 97% to production, including Stripe/PayPal/Wise payments, OpenAI agent workflows, responsive improvements, admin features, and the React Native app upgrade. I’m experienced with MERN, React Native, TypeScript, APIs, payment integrations, and working directly within existing GitHub codebases. I’m comfortable reviewing the current codebase first, identifying the remaining gaps, and then delivering them cleanly with meaningful commits. I can also provide the requested 8 months of post-launch support. Best, Utam
$1,750 USD in 7 days
8.3
8.3

With extensive MERN stack and React Native expertise, along with UI design skills, I am well-equipped to tackle your project. I understand the need to complete the payout and withdrawal features using Stripe, Wise, and PayPal APIs, incorporating admin review flows and OpenAI integration. One question: Could you provide more insights on the current mobile responsiveness issues to address them effectively? Thank you for considering my proposal. Regards, Yogesh Kumar
$1,440 USD in 6 days
7.8
7.8

Hi there, I can take over your existing GitHub codebase, first audit the current MERN architecture, unfinished features, payment flows and customer data before making changes. I can handle Stripe, PayPal and Wise payout/withdrawal workflows with admin approval, OpenAI agent integration, responsive fixes, help/feedback/footer updates, remaining frontend/backend functionality, customer migration and the React Native app upgrade with the same backend. I have an experienced MERN/React Native team and can share relevant live project examples and payment/API work. I’d also provide meaningful Git commits, deployment documentation and the requested eight months of post-launch support. Could you share the GitHub repository and existing migration/database documentation so I can assess the current codebase and give you a realistic timeline and fixed quote? Kindly send me a message to discuss more or directly award me. Thank you!
$1,000 USD in 10 days
7.9
7.9

MERN Stack | OpenAI | React Native | Full-Stack Development Hi, Thanks for sharing the details. You have explained your requirements very clearly. I’m an experienced full-stack developer with experience building AI-powered platforms, SaaS applications, mobile apps, and backend systems. I understand that your website is nearly complete, and you need a developer to finish the remaining payout and withdrawal workflows, Stripe/Wise/PayPal integrations, admin approval flow, AI-powered help section, and responsive design. You also need the React Native app upgraded, customer data migrated, and the entire system tested and ready for launch. I would first review your existing GitHub repository, architecture, API integrations, and outstanding tasks. I would also assess the customer database, migration requirements, and potential data compatibility issues before providing a realistic timeline and fixed-price estimate. I can work directly in your existing repository, implement the remaining features, review and integrate Lovable-generated code where needed, and upgrade the mobile app alongside the website. I’m open to providing eight months of post-launch bug-fix support, with the scope and terms agreed in advance. I’m interested in a long-term collaboration and would be happy to discuss the project further. Best regards, Purnima
$1,750 USD in 20 days
7.8
7.8

Hi there, I understand you need a developer to complete the website and upgrade the React Native app. With extensive MERN and React Native expertise, I can finalize your website features using your existing GitHub codebase. For the app upgrade, I'll implement the required enhancements with a focus on performance and user experience. My approach includes: 1. Analyzing the current code to ensure a seamless continuation. 2. Completing all remaining website functionalities and UI polish. 3. Upgrading the React Native app, integrating any needed APIs or OpenAI features. I'm ready to start immediately and collaborate closely to deliver a polished product. Best Regards, Khorshed Alam, RS Software
$1,500 USD in 10 days
7.9
7.9

The first repository pass will trace every unfinished payout path—from a user withdrawal request through Stripe, Wise or PayPal webhook verification to the admin approval ledger—before changing UI code. I will audit the GitHub branches, environment configuration, API contracts, MongoDB/MySQL dependencies and any Lovable output; then map old-to-new customer fields, password handling and rollback steps before locking the migration plan. I build OpenAI tool-using agents with controlled application-data access and multi-step actions, and have integrated e-commerce payment gateways. Relevant MERN, mobile and AI work is available in my Freelancer portfolio. You receive the production website, responsive flows, migrated customers, TestFlight/Android internal builds, store submissions, handoff documentation, and eight months of bug-fix support within 250 days. Are the Stripe, Wise and PayPal accounts already available in both sandbox and production? Muhammad Saad
$1,000 USD in 30 days
7.5
7.5

Hi, I’m an experienced full-stack developer with strong MERN, React Native, WordPress/PHP, API and automation experience. I’ve worked with Stripe, PayPal, OpenAI APIs, REST integrations, admin workflows and AI-powered automations. I can work directly in your existing GitHub repository, review the current codebase, identify remaining work, and then provide a realistic timeline and quote. I’ll also review the existing customer data and migration process before implementation to ensure a safe transition. I can handle responsive improvements, React Native upgrades, AI agent integration, payment flows, testing and documentation. I’m also available for the requested eight months of post-launch bug-fix support. Thank you Azad
$1,500 USD in 7 days
7.2
7.2

The real risk here is not the last 3% of the website, but making payouts, withdrawals, admin approvals, AI flows, and the React Native app all behave consistently inside an already-active codebase. I’d start with a structured repo audit in GitHub, trace the payment and data flows end to end, then close the remaining frontend/backend gaps before moving the same business logic cleanly into the app upgrade. I’ve worked on MERN codebases where the hard part was finishing existing architecture without breaking what was already there, including Stripe/PayPal checkout logic, admin tooling, responsive cleanup, and OpenAI-powered features that needed tool use and multi-step handling rather than basic chat only. Working inside an existing repository with meaningful commits and handoff documentation is normal for us. I can also cover the post-launch bug-fix window you asked for. - Is the React Native app already connected to the same backend, or does it still use separate endpoints/services? - For Wise payouts, do you already have the payout flow mapped, or do you want me to help define the compliance/review logic as well? - For customer migration, is the source platform custom-built or from another ecommerce/CMS system?
$1,000 USD in 7 days
7.3
7.3

Completing your nearly finished MERN website and upgrading that React Native app sounds like a great project. I see you need to finalize payment features with Stripe, Wise, and PayPal, which can be tricky due to the need for a solid admin review flow, I've worked on similar integrations and know the importance of handling edge cases, like making sure that payment confirmations trigger the correct user notifications without delays. And my approach will focus on completing the existing features while enhancing the AI agent with OpenAI and making sure a smooth transition for customer migration. I’ll also make sure the mobile version is fully responsive and integrates smoothly with your designs, just to cover all the bases. For this project, my rate is $1599, and I’m ready to provide eight months of post-launch support, so let’s get started on this right away. Rajavel MERN Developer | React Native | OpenAI Integrations
$1,599 USD in 14 days
7.1
7.1

Hi, Thank you for posting this good task! This is a broad handoff project, so let me answer your questions directly rather than send something generic. On the MERN and AI agent side, I built Annexa, a Vue and Node platform with an AI agent catalog powered by OpenAI, agents that use saved searches and data sources as tools, multi step chat workflows, and structured artifacts, which maps closely to upgrading your help section's AI agent. On Qatent I built an AI drafting engine with streaming generation and a chatbot layer. For React Native, I shipped Yoyo Wallet, a payments and rewards app live on the App Store and Google Play, plus JubileeConnect and AJUSTEV. I've integrated Stripe end to end including payment intents and webhooks on a recent project. I have not personally integrated Wise or PayPal, and want to be upfront about that rather than claim otherwise, though the underlying pattern of server side verification and admin approval flows is the same work I've done with Stripe. My approach would be to start by auditing your repo against the documented remaining features, testing the existing payment and AI agent code paths, and mapping what's genuinely missing before committing to a fixed number. I can start hourly at 25 USD to assess scope in the first week, then move to milestone pricing once I know real effort, and I'm glad to commit to the eight months of post launch support. Best regards, Diah
$1,750 USD in 7 days
7.6
7.6

Hello!, I am a US-based senior software engineer and this project stood out because it’s the kind of work where details really matter: finishing the website properly, tightening the MERN stack, and upgrading the React Native app without disrupting what already works. I’ve built and shipped production systems with React, Node.js, TypeScript, MongoDB, REST APIs, React Native, and OpenAI integrations. My approach is practical: I’d first audit the current codebase, identify what’s incomplete or fragile, then map the fastest path to get the website and mobile app aligned, stable, and ready to scale. I focus on end-to-end delivery, not just isolated features. A few relevant examples of my work: - A SaaS dashboard for service teams - A React Native field app for internal operations - An AI workflow platform for document processing - An e-commerce admin portal with custom APIs Could you please clarify the following questions to help me better understand the project? 1. What parts of the website are unfinished, and what does “complete” mean for you? 2. For the React Native app, do you need new features, bug fixes, performance work, or all three? 3. Is the OpenAI/agentic layer already started, or should I build it from scratch? If you want someone who pays attention to the small stuff and can move confidently from audit to delivery, I’d be glad to help. James Zappi
$1,900 USD in 7 days
6.6
6.6

Hi, The project requires completing a nearly finished MERN website and upgrading a React Native app, with critical payment gateway integrations and an AI-driven help section. The main engineering risk lies in ensuring robust, secure payout workflows across multiple providers and seamless feature parity between web and mobile platforms. I usually structure work by first performing a thorough codebase audit to identify integration points and potential bottlenecks. My experience completing features within existing repositories and integrating OpenAI agents aligns well with your needs. I typically design separate modules for payment processing, AI agent orchestration, and frontend responsiveness to isolate concerns and ease maintenance. Ensuring reliable multi-step workflows and admin approval flows will be key. I approach systems by implementing fallback mechanisms and monitoring around AI agent responses to maintain user trust and system stability. Systems I build are production-ready and maintainable, designed for long-term support, matching your eight-month post-launch requirement. I would first validate the migration strategy to ensure customer data integrity and minimal downtime. Thanks, Hercules
$2,000 USD in 7 days
6.8
6.8

Greetings !! let me show you my work over chat, YES, I completely got your requirements and able to do it---------LET'S GET STARTED to handle all the given KEY responsibilities. I am highly qualified to do this job with high QUALITY ----- I am Passionate MERN/Full stack developer having rich experience with so many successful Tasks. I have some queries to give you accurate time and price Please ping me to get started and provide you great results. Thanks
$1,800 USD in 7 days
6.9
6.9

Subject: Proposal for Your Web Development Project Hi, Afte r reviewing the details of your project , I’m excited about the potential to collaborate with you. With over a decade of experience in web development, I’m confident in my ability to deliver exceptional results. Here’s why I believe I’d be a great fit for your project: Front-End Development: I have expertise in HTML, CSS, JavaScript, and Bootstrap, enabling me to create visually appealing, responsive designs. Back-End Development: Proficient in CodeIgniter, Laravel, MySQL, and PHP, I can provide robust and scalable solutions. Platform Experience: I am well-versed in WordPress, Shopify, WooCommerce, Elementor, and Webflow. Design/UI/UX: I specialize in Figma, jQuery, and converting PSD files to HTML to ensure a seamless user experience. I am available to start right away and can accommodate your schedule. I would love to discuss how I can help bring your project to fruition. Looking forward to your response! Best, Muhammad Rizwan LA
$1,200 USD in 7 days
6.8
6.8

Hi, I am Adeel. I built Boostifai, a subscription SaaS with Stripe billing and OpenAI integration driving live content and analytics, and ComicBase, a React Native app shipped on the App Store and Google Play. That combination of payments, an AI agent and mobile is close to what you need here. I would start by auditing the repo against your deliverables list, flagging gaps in the payout flow and the help agent before touching code, then confirm the Lovable-generated pieces are safe to integrate rather than assuming they are. I can commit to the eight months of post-launch support and would treat the Stripe, Wise and PayPal payout flow as the first milestone since it carries the most risk. Is the Wise integration for payouts only, or does it also need to handle currency conversion?
$1,000 USD in 10 days
6.6
6.6

Hi, I understand you need someone to finish the existing website in GitHub, complete payouts with Stripe, Wise, and PayPal, improve the help agent, fix responsive issues, and bring the same features into the React Native app. I would first review the current code, database structure, open tasks, payment flows, and customer migration plan. Then I would finish the missing frontend and backend work, test admin approvals and payment callbacks, check mobile and tablet layouts, and commit each clear change to your repository. JavaScript, Node.js, and React.js will be used where they fit the existing code instead of forcing a new structure. I can also review Lovable-generated code, connect the OpenAI agent to safe application data and workflows, prepare setup and deployment notes, and support the release and post-launch fixes. Relevant project links and details of Stripe, Wise, PayPal, and agent work can be shared for review. Playful but important: can I first inspect the GitHub repository and payment-flow test accounts before mapping the remaining work? I can confirm the eight months of post-launch bug-fix support and will assess the codebase before giving a realistic timeline and quote.
$2,500 USD in 17 days
6.4
6.4

Hi there, I see that you're looking to finalize payout and withdrawal features using Stripe, Wise, and PayPal APIs while enhancing responsiveness across devices. My background in full-stack development, particularly with MERN, React Native, and API integrations, makes me well-suited for these tasks. I can implement the Stripe, Wise, and PayPal functionalities effectively and ensure a smooth customer migration process after completing the website. Additionally, I understand the importance of post-launch support, so I am prepared to provide eight months of maintenance to ensure everything runs smoothly. I will work directly in your GitHub repository, maintaining clear communication and delivering on agreed deadlines. Looking forward to discussing how we can move this project forward. Regards, Ali
$1,000 USD in 15 days
6.4
6.4

Your payment gateway setup will fail compliance audits if the admin approval flow isn't architected with proper role-based access control and audit logging. Stripe, Wise, and PayPal each have different webhook retry policies that need idempotent handling to prevent duplicate payouts. Quick questions - what's your current transaction volume target, and are you storing any payment credentials that require PCI DSS compliance? And have you mapped out the customer migration data schema to ensure zero downtime during the cutover? Here is the architectural approach: - STRIPE/WISE/PAYPAL INTEGRATION: Build idempotent webhook handlers with Redis-based deduplication to prevent double-payouts during network retries. - OPENAI AGENTIC WORKFLOWS: Implement function-calling agents with tool validation layers and fallback logic when API rate limits hit during peak support hours. - REACT NATIVE UPGRADE: Refactor shared business logic into a monorepo structure so your web and mobile codebases don't drift during the 8-month support period. I've built similar fintech platforms for 2 SaaS companies that processed $4M+ in annual transactions without a single failed payout. Let's schedule a 30-minute technical review of your GitHub repo before you commit to a timeline.
$1,580 USD in 30 days
7.2
7.2

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