Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m a Java Full Stack Web Developer with strong hands-on experience building secure, scalable applications using Spring Boot, Angular, and SQL. At Redrock IT Solutions, I’ve served as a key architect for JWT-based backends integrated with Angular front-ends, and I’ve led modernization work across authentication and legacy workflow components. I also enjoy taking ownership end-to-end—upgrading systems, improving reliability, and resolving QA-reported issues. From implementing OAuth2 Resource Server/Client integrations and building new authentication bridge applications to using AWS Lambda for health checks and Hazelcast for session replication, I focus on clean engineering practices, high availability, and dependable delivery.…I’m a Java Full Stack Web Developer with strong hands-on experience building secure, scalable applications using Spring Boot, Angular, and SQL. At Redrock IT Solutions, I’ve served as a key architect for JWT-based backends integrated with Angular front-ends, and I’ve led modernization work across authentication and legacy workflow components. I also enjoy taking ownership end-to-end—upgrading systems, improving reliability, and resolving QA-reported issues. From implementing OAuth2 Resource Server/Client integrations and building new authentication bridge applications to using AWS Lambda for health checks and Hazelcast for session replication, I focus on clean engineering practices, high availability, and dependable delivery.

Kumar Vamsi

Full Stack Developer, Web Developer, Back-End Developer, +2





I’m a Java Full Stack Web Developer with strong hands-on experience building secure, scalable applications using Spring Boot, Angular, and SQL. At Redrock IT Solutions, I’ve served as a key architect for JWT-based backends integrated with Angular front-ends, and I’ve led modernization work across authentication and legacy workflow components. I also enjoy taking ownership end-to-end—upgrading systems, improving reliability, and resolving QA-reported issues. From implementing OAuth2 Resource Server/Client integrations and building new authentication bridge applications to using AWS Lambda for health checks and Hazelcast for session replication, I focus on clean engineering practices, high availability, and dependable delivery.…I’m a Java Full Stack Web Developer with strong hands-on experience building secure, scalable applications using Spring Boot, Angular, and SQL. At Redrock IT Solutions, I’ve served as a key architect for JWT-based backends integrated with Angular front-ends, and I’ve led modernization work across authentication and legacy workflow components. I also enjoy taking ownership end-to-end—upgrading systems, improving reliability, and resolving QA-reported issues. From implementing OAuth2 Resource Server/Client integrations and building new authentication bridge applications to using AWS Lambda for health checks and Hazelcast for session replication, I focus on clean engineering practices, high availability, and dependable delivery.

Available to hire

I’m a Java Full Stack Web Developer with strong hands-on experience building secure, scalable applications using Spring Boot, Angular, and SQL. At Redrock IT Solutions, I’ve served as a key architect for JWT-based backends integrated with Angular front-ends, and I’ve led modernization work across authentication and legacy workflow components.

I also enjoy taking ownership end-to-end—upgrading systems, improving reliability, and resolving QA-reported issues. From implementing OAuth2 Resource Server/Client integrations and building new authentication bridge applications to using AWS Lambda for health checks and Hazelcast for session replication, I focus on clean engineering practices, high availability, and dependable delivery.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Javanese

Advanced

Work Experience

Web Developer (Freelance) at SyenaCodeLabs

June 1, 2024 - November 30, 2024

Designed and developed two payment gateway solutions from scratch, including transaction monitoring, wallet management, and admin/user tools. Implemented authentication and security mechanisms for client websites, and delivered complete end-to-end solutions from design through deployment. Collaborated with clients to gather requirements and ensure scalable application delivery while maintaining ownership of key development tasks.

Senior Software Developer at Redrock IT Solutions India Pvt Ltd

November 1, 2022 - Present

Architected and delivered the office’s first Spring Boot JWT-based backend integrated with an Angular front-end for the Ovs Compass Project, focusing on security and scalability. Upgraded legacy Flowable Engine workflows from JDK 15 to JDK 17, removed Tiles configuration, transitioned required workflow components towards Angular, and modernized authentication using Spring OAuth2 Resource Server and OAuth Client. Independently built a new Spring Authentication bridge app to connect client applications with resource servers using token-based authentication. Also contributed to a legacy NYPD project upgrade from JDK 1.8 to JDK 15 and migrated Spring to Spring Boot with necessary implementation changes. Built AWS Lambda health-check functions for running applications, implemented Hazelcast session replication to support high-traffic Spring sessions, and developed a Python-based trade monitoring/analysis app to monitor user trading activity.