Open to opportunities

Suman Kumar

@sumankumar4

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Backend Java Developer building scalable microservices with faster, reliable enterprise APIs.

India

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What I'm looking for

I’m looking for a backend Java role where I can build scalable microservices, design secure REST APIs, and strengthen CI/CD reliability using AWS/Azure—delivering measurable improvements in latency, deployments, and system uptime.

I’m a backend-focused Java Developer with 5 years of hands-on experience architecting and delivering scalable, high-performance enterprise applications. I specialize in Core Java, J2EE, Spring Boot, and microservices architecture.

I consistently improve production outcomes—enhancing reliability by 25% across 6+ distributed Java/Spring Boot microservices, reducing deployment time by 30% and errors by 35% through Jenkins & Docker-based CI/CD automation, and delivering high-traffic RESTful APIs (5,000+ daily requests) with 40% faster response times.

I design and secure RESTful services, resolving 100% of critical security vulnerabilities (XSS, CRLF, SSRF) across 15+ backend services. I also lead teams (mentored 5+ developers), deliver strong test coverage with JUnit/Mockito, and support accessibility with WCAG 2.1 backend enhancements.

Experience

Work history, roles, and key accomplishments

Current

Application Developer

Current

IBM

Apr 2021 - Present (5 years 1 month)

Engineered Spring Boot/Core Java microservices for telecom backends, reducing REST API latency by 40% and supporting high-volume transactions. Improved CI/CD with Jenkins and Docker, accelerating delivery by 20%, and strengthened security and test coverage using JUnit and Mockito.