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Agniva Bhattacharjee

@agnivabhattacharjee

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Backend Software Engineer at Keross R&D who migrated a monolith into 12+ independently deployable services.

India

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At Keross R&D, I engineered Java Spring Boot microservices for a migration from a monolith into 12+ independently deployable services, reducing new-feature deployment time by about 35%.

I enabled asynchronous workflows across 10+ services with Kafka and RabbitMQ, and replaced Airflow-based orchestration with Celery distributed task execution, reducing pipeline latency by about 30%.

I containerized services with Docker and deployed them through Kubernetes and Helm. I also provisioned infrastructure with Terraform and monitored production systems with Prometheus and Grafana, contributing to 99.9% service uptime.

Earlier, I built RESTful APIs and microservices at Keross R&D and contributed to backend services for Infits at Variant Labs and TaskFlow at NIIT. In my BookMyShow project, I created an eight-service booking system with Kafka and Redis, supporting 1,000+ concurrent requests.

Experience

Work history, roles, and key accomplishments

Current

Software Developer Level 1

Current

Keross R&D

Feb 2025 - Present (1 year 7 months)

Engineered Java Spring Boot microservices for a large-scale migration from monolithic to microservice architecture, improving scalability and reducing deployment time. Implemented event-driven messaging with Kafka and RabbitMQ, and containerized services using Docker and Kubernetes.

Java Spring Boot Microservices Kafka RabbitMQ Redis MongoDB MySQL Cassandra Docker Kubernetes Helm Terraform Prometheus Grafana JUnit5 Mockito Test Driven Development Git Maven Gradle CI CD Agile Scrum

Current

Software Development Engineer – Backend

Current

Keross R&D

Aug 2024 - Present (2 years 1 month)

Full Stack Developer Trainee

Keross R&D

Aug 2024 - Feb 2025 (6 months)

Built and maintained RESTful APIs and microservices using Java Spring Boot, implementing service-layer logic and data persistence. Developed reusable React components to consume backend APIs and contributed to CRM and document management features.

Java Spring Boot Spring MVC Spring Data JPA Hibernate React REST APIs Swagger OpenAPI Postman Spring Security JWT OAuth PostgreSQL Tomcat

Backend Developer Intern

Variant Labs

Jul 2023 - Oct 2023 (3 months)

Developed and maintained backend services and RESTful APIs for Infits, a fitness-tracking application, collaborating with mobile and web teams to design API contracts and troubleshoot integration issues.

Backend Development REST APIs API Design Collaboration

Java Backend Developer Intern

NIIT

Jan 2023 - Jun 2023 (5 months)

Built RESTful APIs for TaskFlow, an employee task and workflow management system, using Java, Spring Boot, Spring Data JPA/Hibernate and MySQL, with Git/GitHub-based version control and Postman API testing.

Java Spring Boot Spring Data JPA Hibernate MySQL Git GitHub Postman