Hari Krishnan

Build backend services for a supply-chain replenishment platform using Java, PostgreSQL, Kafka, and Redis, delivering production features end to end. Implement replenishment workflows within an event-driven Kafka architecture and tune data access and caching for reliable latency.

Cut database load by 30% and API response times by 40% through query, index, and application-layer optimization. Redesigned the reporting module architecture, reducing data-processing time from 5 seconds to 1 second, and led an engineering team delivering mission-critical features.

Designed and implemented scalable backend APIs with a focus on availability, low latency, and maintainability. Built a GraphQL layer to reduce redundant API round-trips, implemented Elasticsearch-backed search, and integrated multiple third-party services.

Automated CI/CD delivery, reducing deployment time from 7 days to 1 day. Designed and launched a self-service audit module, developed secure REST APIs over millions of financial records, and moved heavy workloads onto Sidekiq background jobs.

Implemented automated testing and raised test coverage to 70%, reducing production defects. Integrated a secure escrow payment service, eliminated recurring database query timeouts, and processed high-volume background jobs with Sidekiq.

Developed secure REST APIs with OAuth authentication for production client applications. Built an RFID-based cart-tracking system for retail stores and integrated third-party services including payment gateways.

Completed Master of Computer Applications with a focus on software engineering and web development.

Completed Bachelor of Computer Applications with a focus on software engineering and data science.