Vandana S.

Full-Stack AI Engineer | Generative AI | Python| Next.js | Saas Dev

Need an AI-capable SaaS or internal tool shipped without drama? I build production web apps fast and keep them easy to extend. I'm Vandana Sharma, a Senior Full-Stack AI Engineer with 15+ years in software and 7,000+ Upwork hours. Clients bring me in to own the build from scope to launch, with consistent 5 star outcomes. I deliver full products end to end. React and TypeScript on the front. Python REST APIs on the back. Clean architecture, tests, and clear patterns that future teammates can pick up without a learning wall. For AI features, I ship LLM chat, RAG over docs, copilots, and document intelligence. LangChain with OpenAI where it fits. Retrieval is traced with logs, prompt history, and error capture, so you can see what happened and fix issues fast. Data stays isolated per tenant. Sensitive fields are kept out of prompts by design. Infra and release flow are steady from day one. AWS with Docker and Kubernetes. CI/CD with staging checks and quick rollback plans. PostgreSQL for core transactions. MongoDB for flexible content. What I can help with: - SaaS MVPs and internal tools, from sketch to first users - RAG chat over manuals, PDFs, and wikis using LangChain plus OpenAI - Copilot features inside existing apps - React and TypeScript UIs that stay maintainable and tested - Python REST APIs on AWS with PostgreSQL or MongoDB - Migrations, refactors, and tough production bugs How I work: - Short discovery, clear scope, and milestones - Prototype or API spec in 48 to 72 hours - Weekly demos, no surprises - CI/CD, staging, and smoke tests before release - Clean Git history with small PRs and reviews - Handover docs with runbooks. Short Loom walk-through if helpful. I'm hands-on and responsive, with overlap across US and UK hours. If you need a senior who can design, build, and ship, let's talk. I can start soon and move fast without breaking the future.