About Me
Hi, I’m Raj Kumar, a Java developer with 1.4 years of experience working on both core and advanced Java technologies. I’ve been actively involved in backend development using Spring Boot, Hibernate, MySQL, and microservices. Currently, I’m working at Hulk Hire, where I contributed to building a secure and scalable Core Payment Integration System for an e commerce client.
I’ve designed and implemented key modules like payment validation, status tracking, and API security using Spring Security and HmacSHA256. I also have hands on experience with Redis for caching and AWS services like EC2 and RDS.
Before this, I worked at Birla soft, where I helped integrate a BNPL solution for a major client, focusing on Spring Boot APIs and secure payment workflows. I’m a strong believer in writing clean, modular code, and I follow design patterns like Factory and Chain of Responsibility.
My Expertise
Key Skills:
Java + AWS
SQL
Java + Spring Boot + Microservices
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