Michael S.

Full Stack Developer, React and Node: 8 years, 40+ apps, over 90% of them still running in production. Mostly FinTech and SaaS. If your last developer left you a half finished repo, that is the job I like most. Top Rated, top 5% of talent on Upwork. Full Stack, SaaS and AI Development. Over 90% of the products I build ship to production, and most are still live and in daily use today. ABOUT ME ✅ 8+ years and 40+ delivered products as a Full Stack Developer in React and Node, across SaaS platforms, AI apps, MVPs, and web application delivery ✅ $4M+ in client revenue impact and 60,000+ active users across the products I have built ✅ 20,000+ active users on a SaaS platform, where my React Developer work lifted engagement by 22% ✅ 10,000+ users on a healthcare web application, where React Developer ownership cut admin workload by 40% ✅ 15,000+ daily AI prompts processed on an AI platform I built, cutting manual resolution time by 40% ✅ 2,400+ completed orders and 480+ registered customers on an ecommerce and CRM MVP ✅ 90% faster order processing and 80% lower manager workload through workflow automation ✅ Top Rated Plus with a 100% Job Success Score on every contract, backend architecture through to production UI WHERE I DELIVER As a Frontend React Developer, 20+ systems with UI development, dashboards, and responsive builds across SaaS platforms, booking platforms, and ecommerce websites. As a React and Next.js Developer, 15+ launches with 30% faster iteration through design to code and component development. As a Full Stack Developer React Node, 25+ end to end builds with backend APIs, data architecture, and secure scalable systems from early stage MVP to live SaaS platform. As a Full Stack Developer React Node, AI powered product builds: chatbots, RAG assistants, and automation with OpenAI, Claude API, FastAPI, and vector databases. As a Full Stack Developer, 12+ backend heavy products with 28% lower delivery risk on Node.js and Python. As a Full Stack Developer React Node, 6 to 18 month engagements as a long term development partner: scale existing platforms, professionalize, review, improve, and launch. INDUSTRY IMPACT SaaS Platform, B2B, Two Sided Marketplace: 50,000+ active listings, 35% higher conversion, and $2M+ in monthly transaction volume as a Full Stack Developer React Node. Healthcare, Clinic Management SaaS, Telehealth: 10,000+ active users, 500+ daily appointments processed, and 15% fewer patient no shows as a Frontend React Developer maintaining 99.9% uptime. AI Powered: 5+ products deployed with custom AI agents, chatbots, and RAG systems on OpenAI, Claude API, and FastAPI, processing 15,000+ daily prompts and cutting manual resolution time by 40%. Logistics, ERP, Internal Workflow: up to 12 hours saved per order cycle, 30% faster reporting, and 40% fewer data entry errors across 5+ regional hubs as a Full Stack Developer React Node. Fintech, LegalTech, PropTech MVP: 40% higher retention over 6 months and role based access for 5,000+ users through Frontend React Developer work. Clients typically work with me when they need: - a Full Stack Developer who can own frontend and backend - a SaaS Developer who understands long-term scalability constraints - a Backend Developer experienced with real production systems - mobile app developer and React developer experience as a software developer - backend services built with Node.js or Python by an experienced Python developer - web applications with complex workflows and business rules from a senior web developer - API-driven architectures and third-party integrations - SaaS platforms designed to support growth, analytics and SaaS marketing data needs - MVPs that can realistically evolve into long-term SaaS products HOW I BUILD Frontend as a React Developer: React, Next.js, TypeScript, JavaScript, Tailwind CSS, Redux, HTML5, CSS3, responsive design, real time UI. Full stack and backend as a Full Stack Developer React Node: Node.js, Python, ASP.NET, PostgreSQL, MySQL, MongoDB, Redis, REST API, WebSockets, Stripe, payment, auth, and third party API integrations. AI as a Full Stack Developer: OpenAI, Claude API, FastAPI, RAG, vector databases, LangChain, AI agents, chatbots, and workflow automation. Also across the stack: Vue, Supabase, Firebase, Docker, AWS, Vercel, CI/CD, software architecture, and end to end delivery from MVP to live platform.