Full Stack Engineer 4+ years of experience building scalable applications and is ready for an immediate job with a transferable visa. His comprehensive technical toolkit includes Frontend: React.js, Next.js, React Native, TypeScript, JavaScript, HTML5, CSS3, and Tailwind CSS; Backend: Node.js, Express.js, NestJS, Python, and PHP; Databases: MongoDB, PostgreSQL, MySQL, and Vector Databases; AI & RAG: OpenAI APIs, LangChain, Retrieval-Augmented Generation (RAG), Semantic Search, Vector Embeddings, and Prompt Engineering; APIs & Cloud: REST APIs, JWT, RBAC, OAuth, AWS, Docker, CI/CD, Git, GitHub Actions, and Vercel; and Architecture: System Design, Scalable Architecture, and Performance Optimization.