Atul Kumar Singh

I’m an entry-level backend developer with a strong foundation in data structures, scalable systems, debugging, and building efficient, secure applications. I’m especially motivated by work that turns complex requirements into reliable services.

During my remote Software Engineering virtual internship at JPMorgan Chase & Co., I developed Spring Boot Kafka microservices, addressed configuration issues, and ensured system stability. I implemented Kafka consumers, RESTful APIs, JPA entities, and H2 database persistence, then troubleshot Java Spring applications to fix Application Context errors and microservice integrations.

In my projects, I focus on practical backend engineering: I built a Complete Authentication System with JWT-based REST APIs, MongoDB (via Mongoose), and bcrypt, including protected routes and centralized error handling. I also created a Real-time Chat Backend with WebSocket lifecycle management and message broadcasting for low-latency messaging.

For larger system design, I engineered an Arena Bus Ticketing System with Node.js, Express, TypeScript, PostgreSQL, Redis, and idempotent REST APIs—using optimistic locking (preventing race conditions) and transactional safety (SELECT FOR UPDATE) to ensure zero double-booking. I’ve also explored Generative AI by developing an AI Code Explainer that uses LLMs to generate beginner-friendly, context-aware explanations.