Mohammad S.

Looking for a developer who takes time to understand your business before building? You've found one. ✅ Trusted by FedEx, and enterprise Healthcare brands. 👨‍💻 Senior Full-Stack & React Native Engineer (10+ years) - financial, crypto, healthcare, fintech, gaming, and AI 📱 One of the few React Native devs who ships on-device computer vision - no cloud, no latency 🚀 I build from idea to production: architecture, API design, deployment, and debugging after launch ✔ Brought in by founders for MVP launches, enterprise rebuilds, and production fires 🤝 I work like a product partner — clear trade-offs, honest scope, no handoffs at "the AI part" 🩺 Telehealth systems specialist: intake engines, provider review and e-prescribing APIs (Beluga, Pharmetika), pharmacy fulfilment, and subscription billing where a renewal needs clinical re-approval, not just a Stripe charge. As a Full Stack Engineer, I'm usually brought in for MVP builds, product rebuilds, and "this is breaking in production" moments. The difference between hiring me and hiring someone who only ships features: I own the outcome, not just the ticket. Here's what I do: 1. Full-Stack Development 🔹 End-to-end SaaS and MVP delivery - from architecture decision to production deploy 🔹 Clean code, clear documentation, and a codebase your team can actually maintain 2. React Native + On-Device Computer Vision 🔹 I build real-time CV pipelines directly inside React Native - OpenCV, image processing, object detection, and biometric flows running fully on-device 🔹 New Architecture (Fabric/TurboModules), native-grade performance, no cloud round-trip 3. Healthcare & Healthtech 🔹 I led the technical team at iCareBetter (Boston healthtech), building a platform that connects patients with vetted surgeons — location-aware provider search, Stripe payments, and EMR integration 🔹 Built a double-blinded peer vetting workflow where clinical surgeons review and certify each other, raising the quality bar across the network 🔹 HIPAA-aware development: secure data handling, access controls, and the reliability healthcare products actually require 🔹Architecting a custom DTC telehealth platform replacing a third-party stack (Bask Health), covering dynamic medical intake, Stripe subscriptions with clinical renewal logic, provider review and prescription APIs, and pharmacy fulfilment behind a vendor-neutral integration layer 4. Front-End (React, Next.js, TypeScript, Shadcn) 🔹 Dashboards, product UIs, and modular CMS - built to stay fast as you grow 🔹 SSR, performance audits, and PWA delivery (shipped this at FedEx at enterprise scale) 5. Back-End (Nest.js, Node.js and Laravel) 🔹 APIs, auth (Auth0, JWT), permissions, and business logic built for real usage - not demos 🔹 Background jobs, WebSocket services, and webhooks that hold up when requirements change 6. Database (PostgreSQL, MongoDB, Supabase) 🔹 Data modeling, migrations, and query performance - designed for production, not just MVP 🔹 GraphQL APIs and clean data layers wired to your front end 7. Cloud & Deployment (AWS, Vercel) 🔹 Reliable deployments with clean environments and predictable releases 🔹 AWS Beanstalk for real control; Vercel when you need speed and iteration 8. Fintech & Payment Systems 🔹 Stripe integration, EMR services, and full crypto wallet apps with Web3 signing flows 🔹 Ethereum, Bitcoin, and Binance network integrations - production-grade, not toy demos 9. AI & LLM Integrations 🔹 OpenAI and Anthropic integrations with rate limiting, cost control, and fallback logic 🔹 I wire the AI features into your actual product stack, not a bolt-on Common projects I handle SaaS product development — full 0 to Hero ownership React Native apps with on-device CV and real-time features MVP builds under real production constraints (Next.js + NestJS + PostgreSQL or Laravel) Backend systems: auth, APIs, queues, business logic Fintech and payment systems: Stripe, crypto wallets, Web3 AWS deployments and production stabilization Performance audits and load testing (k6) Codebase refactors and release safety improvements LLM feature integration into existing products Tools I use ✓ React, Next.js, TypeScript, Shadcn, Redux ✓ Node.js, NestJS, GraphQL, WebSocket ✓ PostgreSQL, MongoDB, Supabase ✓ AWS (Beanstalk), Vercel ✓ Auth0, Stripe, Sentry, Cypress ✓ OpenCV, React Native New Architecture (Fabric/TurboModules) ✓ OpenAI, Anthropic, Web3 If you're building a SaaS, launching an MVP, or fixing something broken in production, let’s chat. I’ll give you a straight-up answer on the scope, timeline, and if I'm the right person for the job.