Krishanu Adak

Java Backend Developer

Kolkata, West Bengal 2+ yrs exp 85 · Excellent

About

Java Backend Developer with 2+ years building event-driven microservices and production-grade REST APIs on AWS. Experienced in Spring Boot, Kafka, and distributed systems, with hands-on work integrating Gen AI (LangChain4j, RAG) into backend services.

Skills & Expertise (28)

Spring Boot Intermediate

5.5/10

Years Exp

Java Intermediate

5.5/10

Years Exp

RESTful APIs Intermediate

5.5/10

Years Exp

Apache Kafka Intermediate

5.5/10

Years Exp

Agile Methodology Intermediate

5.0/10

Years Exp

MySql Intermediate

5.0/10

Years Exp

API Gateway Intermediate

5.0/10

Years Exp

bootstrap Intermediate

4.5/10

Years Exp

JavaScript Intermediate

4.5/10

Years Exp

CSS Intermediate

4.5/10

Years Exp

HTML Intermediate

4.5/10

Years Exp

AWS Eureka IAM ECR RDS S3 EC2 Saga Vector Embeddings Tool Calling OpenAI API ChromaDB RAG pipeline Resilience4j JWT Authentication Redis OpenFeign

Work Experience

System Engineer

Tata Consultancy Services

Mar 2024 - Present

Developed an algorithm that reduced API response times by 87%, while increasing server efficiency by 80%. Built 3 microservices for handling concurrent users with 99.9% uptime within utilities domain. Architected event-driven microservices using Kafka for async communication between 3 services. Secured API using JWT-based authentication with role based access control. Worked on Agile methodology and delivered more than 80+ user stories. Collaborated with 3+ cross functional teams to gather requirements, define project scopes, ensure alignment with business objectives.