Josh Kumar

I've developed and enhanced 150+ RESTful APIs at Tata Consultancy Services using Java, Spring Boot, Spring MVC, and Spring Data JPA, improving backend scalability and reducing feature delivery time by 25%.

Through a TCS engagement with Amazon Code Q, I engineered an agentic AI coding assistant for code generation, explanation, refactoring, and debugging. I owned context engineering and token management for its RAG pipeline, including embeddings, repository indexing, and context-window optimization.

I've refined prompt engineering and reasoning workflows to improve response accuracy by 20% while reducing hallucinations, and I performed LLM evaluation and response benchmarking to improve reliability and developer experience.

I also build practical products, including a hackathon-winning RAG-based insurance assistant and MathLit, an exam preparation platform built with Java, Spring Boot, and scalable REST APIs. I'm AWS-certified in Generative AI application development and cloud solution architecture.