Subir Chandra Kar

Built scalable Java Spring Boot microservices and secure REST APIs for a vendor onboarding platform handling 50,000+ tasks daily, improving workflow execution and task lifecycle management. Implemented a MongoDB CDC-based CQRS architecture and ElasticSearch search flow, reducing data access read latency by ~60%. Contributed to system design, performance optimization, deployment planning, and production support to ensure scalability and reliability.

Contributed to architecture and implementation of a cloud-connected printer management platform processing telemetry for 100,000+ devices and enabling generation of ~6,000 consumable orders daily. Designed and developed secure REST APIs and reusable Angular modules supporting pagination, dynamic filtering, sorting, bulk operations, routing guards, and fine-grained role-based access controls. Automated supply threshold notifications (80% reduction in manual monitoring effort), implemented bulk firmware deployment capabilities (70% rollout time reduction), and optimized synchronization mechanisms to reduce data propagation latency from ~15 minutes to under 10 seconds. Supported CI/CD and multi-environment deployments using Jenkins, Docker, and Git.

Developed backend services using Java, Spring, and OAuth2 for device notifications (50,000+ devices), user-facing APIs serving 25,000+ daily users, and bulk file upload capabilities supporting up to 500 records per file. Provided production support for enterprise applications including debugging, defect resolution, root cause analysis, and cross-functional collaboration to ensure high system availability and customer satisfaction. Managed Git workflows, CI/CD pipelines, and Docker-based deployments across multiple environments to support reliable releases.