Raj Kumar Sony

Java Backend Engineer with 4+ years of experience developing scalable applications using Java, Spring Boot, Microservices, REST APIs, and AWS. Experienced across system design, development, testing, deployment, production support, and code reviews. Proven track record of reducing API latency by 60%, release cycles by 50%, and infrastructure costs by 35%. Experienced in scalable backend systems, troubleshooting, technical documentation, and Agile development.

Software Engineer – Java Backend / SaaS - PLAN-B, Inc. - Osaka, Japan

(2023-02)

• Designed, developed, tested, deployed, maintained, and enhanced scalable B2B SaaS backend services using Java, Spring Boot, Microservices, and AWS, improving scalability by 40% while leading end-to-end SDLC from requirements through production release.
• Developed and maintained Spring Boot microservices and REST APIs serving thousands of users, with focus on scalability, reliability, testability, and performance.
• Participated in system design and technical design reviews with engineers and stakeholders to evaluate implementation approaches and deliver scalable backend solutions.
• Triaged, debugged, tracked, and resolved production issues using application logs and CloudWatch monitoring, reducing API latency by 60%.
• Documented REST APIs, technical specifications, and deployment processes to improve maintainability and team collaboration.
• Migrated legacy PHP platforms to a modern Spring Boot microservices architecture, reducing API latency by 60% and cutting server infrastructure costs by 35%.
• Automated CI/CD pipelines using Jenkins and GitHub Actions with CloudWatch monitoring, reducing release cycle time by 50% and Mean Time to Recovery (MTTR) by 40%.

Programmer Analyst – Java Full Stack Engineer - Cognizant Technology Solutions - Bangalore, India

(2022-03 - 2022-09)

• Developed and enhanced Healthcare IT Tracking System using Java, Core Java, Spring Boot, Angular, and MySQL, improving end-user experience by 30% through application optimization and cross-functional collaboration.
• Developed enterprise applications using Java, Core Java, Spring Boot, REST APIs, and Microservices.
• Participated in peer code reviews to maintain coding standards and improve software quality.
• Contributed throughout the complete Software Development Life Cycle (SDLC), from requirement gathering to deployment and production support.
• Improved AWS resource utilization by 40% and reduced data retrieval time by 35% via targeted MySQL query optimization, indexing, and cloud architecture improvements.

MCA - CMR Institute of Technology (CMRIT) (2019-08 - 2022-09)

BCA - Sachchidanand Sinha College (2015-05 - 2018-10)