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jakarsai kumar

@jakarsaikumar

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Java backend engineer building scalable microservices and secure cloud-native APIs.

India

Message

What I'm looking for

I’m looking for a role where I can build secure, high-throughput Java microservices, improve observability and reliability, and also grow in full-stack and AI-powered backend development within cloud-native DevOps practices.

I’m a Java Backend Engineer with 3.6 years of experience building scalable microservices using Java 17, Spring Boot, Kafka, Redis, and AWS. At Tata Consultancy Services, I architected microservices with Spring Cloud Gateway to handle API routing and load balancing for a distributed system serving 65%+ of platform traffic.

I focus on reliability, security, and observability—building secure REST APIs with Swagger/OpenAPI, implementing JWT-based RBAC with Spring Security, and delivering 99.9% message delivery reliability with Kafka retry and dead-letter queues. I also optimize performance (cutting MySQL lookup latency by ~40% with indexing and Redis), add audit logging for 100% of access events, and support production health using Prometheus/Grafana and Zipkin tracing. Alongside backend work, I’ve built React admin capabilities, set up Docker + Jenkins CI/CD, deployed on AWS (EKS, VPC, CloudWatch, IAM), and created an AI-powered content recommendation service with Spring AI/OpenAI that reduced manual content tagging by 70%.

Experience

Work history, roles, and key accomplishments

Technology Analyst

Tata Consultancy Services Limited

Mar 2022 - Oct 2025 (3 years 7 months)

Architected and delivered Java 17 microservices using Spring Boot and Spring Cloud Gateway, building secure REST APIs and integrating Kafka-based real-time event streaming with reliability features. Optimized database and caching performance, implemented JWT/RBAC security, added observability with Prometheus/Grafana and Zipkin, and supported cloud-native CI/CD and Kubernetes deployments on AWS.