Open to opportunities

DeepakKumar Singh

@deepakkumarsingh2

Message

I build Java microservices and AI-powered applications using RAG and LLMs.

India

Message

What I'm looking for

I'm looking to build impactful backend, full-stack, and AI-powered products, especially with Java, Spring Boot, microservices, RAG, LLMs, and scalable distributed systems.

At Cognizant, I build microservices and AI features for Sanofi, including a RAG pipeline with Spring AI, vector stores, GPT-4.0, and tool calling for context-aware pharmaceutical document and order-summary queries.

I've also built a digital-product marketplace at UniqueSide and created Prompt-Craft, an LLM-powered full-stack application generator re-architected from a monolith into independently scalable microservices. My work spans Java, Spring Boot, React, Kafka, Redis, Docker, and AI-powered products, including an email assistant and Chrome extension that reduced manual drafting time by about 70%.

Experience

Work history, roles, and key accomplishments

Current

Software Development Engineer

Current

Cognizant

Jun 2025 - Present (1 year 2 months)

Built a microservices-based platform for a pharmaceutical client, including user, product, and summary services with Feign Client for inter-service communication. Developed a RAG-based feature using Spring AI and vector stores, integrated OpenAI GPT-4.0, and implemented tool calling for autonomous API invocation.