Rajan A.

I’m a Senior AI & Full-Stack Developer with 17+ years of software development experience, building production web applications, APIs, integrations, automation systems, and AI-enabled business solutions. My core stack includes Python, FastAPI, Django, React, Angular, Node.js, Express, PHP/Laravel, PostgreSQL, MySQL, MongoDB, AWS, Docker, and REST/GraphQL APIs. Alongside traditional full-stack development, I work on AI/LLM-powered applications, AI assistants, retrieval-based systems, prompt workflows, structured AI outputs, AI-enabled analytics, data pipelines, and API-driven AI integrations. I can help businesses add AI capabilities to existing products without unnecessarily rebuilding their current systems. AI & Automation Experience - LLM-powered applications and AI assistants - Python / FastAPI AI backend services - Prompt engineering and structured outputs - Retrieval and document-based AI workflows - AI-powered business analytics and reporting - AI integrations with existing SaaS and enterprise applications - Data ingestion and preprocessing pipelines - SQL-backed AI applications - Role-based and permission-aware AI workflows - AI evaluation, testing, and output validation - API integrations with AI services - Workflow automation and intelligent process improvement Full-Stack Engineering - React, Angular, JavaScript & TypeScript - Node.js / Express - Python / Django / FastAPI - PHP / Laravel - PostgreSQL, MySQL, MongoDB & Redis - REST APIs & GraphQL - AWS, Docker & Linux - Authentication & role-based access - Twilio, payments and third-party integrations - Existing application modernization and production troubleshooting