Shubham K.

Top Rated Plus full stack developer with 100% Job Success and 8,000+ hours delivered on Upwork. I build AI-powered SaaS products, and I take over existing codebases to fix, extend and scale them. Clients usually hire me for one of these: 🤖 AI features that work in production Adding OpenAI or Claude to real products: chat assistants, RAG over your documents, AI agents with tool calling, structured outputs and workflow automation. Built with proper validation, error handling and cost control. 🧩 SaaS products from idea to launch User accounts, roles and permissions, dashboards, admin panels, Stripe subscriptions and third party integrations, built on React, Next.js, Node.js or Python. 🛠️ Taking over an existing product Understanding someone else’s code, fixing bugs, cleaning up technical debt, improving performance and shipping new features without unnecessary rewrites. What I’ve worked on: AI automation platform for healthcare workflows (lead front end developer) Platforms that help AI companies build, test and deploy automation Real estate marketplace with live listings, messaging and bookings Crypto exchange features: deposits, withdrawals, transfers and conversions using exchange APIs E-commerce with product browsing, cart, checkout and secure user accounts Core stack: React, Next.js, TypeScript, Tailwind | Node.js, NestJS, Python, FastAPI, Django | PostgreSQL, Supabase, MongoDB, Redis | AWS, Vercel, Docker, CI/CD | OpenAI, Claude, RAG, vector search | Stripe, OAuth, webhooks How I work: ✔ I clarify the business goal before choosing the architecture ✔ You get regular updates and working builds you can test ✔ I use Claude Code and Codex to move faster, and I review and test everything myself ✔ Clean, documented code that your team can maintain after me Send me a short description of your project or your current codebase, and I’ll reply with how I’d approach it and a realistic estimate.