Muhammad H.

Approve the milestone or you pay nothing for it. I take the risk on every MERN Stack build, you take none MERN Stack developer, Top Rated with 100 percent Job Success and a 5.0 rating on every reviewed contract. I build and repair React, Node.js and Next.js applications: authentication, REST APIs, Stripe payments and PostgreSQL. - SaaS products in TypeScript and JavaScript, from first screen to paying users. - AI integration with the OpenAI API inside the MERN Stack app you already run. - Stripe checkout, subscriptions and refunds that reconcile instead of quietly failing. - REST API and API integration work documented with OpenAPI, so nobody inherits a mystery. - Authentication and role based access that keeps the wrong people out of your data. - MongoDB, PostgreSQL and Supabase databases that stay fast as the tables fill up over time. - Endorsements that repeat across contracts: committed to quality on eight, clear communicator on six, reliable on five. Results On Record A PostgreSQL and Node.js engagement that ran 137 billed hours and closed on 29 October 2026 with a five star review. An OpenAI API integration for a SaaS web app, now in progress. An IoT smart controller application delivered across a seven month build, September 2025 to April 2026. A TikTok and Instagram API integration that replaced a daily copy and paste routine with REST API calls. What I Build - You get a plain English plan, a clear estimate and a written scope before I touch the code. - Node.js and ExpressJS services with clean REST API endpoints and OpenAPI documentation. - Stripe payments, subscriptions and the webhook handling most rushed builds skip. - Authentication, user roles and permissions for React and Node.js applications. - SaaS platforms on MongoDB, PostgreSQL and Supabase, with AI integration via the OpenAI API. Tech Stack Front end: React, Next.js, TypeScript, JavaScript. Back end: Node.js, ExpressJS, REST API, API integration. Databases: MongoDB, PostgreSQL, Supabase. Payments and documentation: Stripe, OpenAPI. AI: the OpenAI API inside existing MERN Stack and SaaS products. How I Work - You get a plain English plan, a fixed price and a written scope before I touch the code. - You get progress updates without asking, and early warning the day something slips. - You get JavaScript and TypeScript code your next developer will actually understand. - You get a delivery date, and if anything threatens it you hear from me first, not after. Who I Work Best With - SaaS founders with a MERN Stack product that is half built and has stopped moving forward. - B2B teams that need React, Node.js and Next.js work done without hiring full time. - Agencies with a Stripe, REST API, Supabase or AI integration job that has a hard deadline. Next Step Message me with what is broken or what you want built, and you will have a reply within 4 hours.