KATHIRVARSHAN SUBRAMANIAN

• Architected and delivered the Dashboards feature from scratch, giving customers a unified view of real-time and historical event delivery status, success rates, and failure trends. Implemented Redis-based server-side caching that reduced REST API response times by 98% (30s → 500ms) for enterprise customers operating on high-volume datasets.
• Optimized the core event processing microservice by identifying and eliminating redundant database queries, improving throughput by 50%(10K → 15K events/sec) with zero infrastructure spend or additional hardware.
• Built the Logs feature end to end, using Zoho’s internal component-based UI framework and backend REST APIs to help customers debug failures, trace event delivery, and identify failure patterns in real time. Optimized MySQL query performance through strategic indexing and query restructuring, cutting execution time from 18 seconds to 1 second on 3M+ row datasets — validated through load testing.
• Led the technical analysis and proposed the architectural migration of the Application Alerts feature from a pull-based polling model to a Kafka-driven, WebSocket-delivered push system — designing for faster real-time delivery, reduced polling overhead, and improved notification reliability; proposal accepted and queued for next prioritization cycle.
• Maintained the Multiple Organisation feature in Zoho CRM, performing major code refactoring across the module to significantly reduce technical debt — modernising legacy code paths while preserving 100% of existing functionality and ensuring zero regression for enterprise customers.
• Integrated AI-assisted development workflows to automate 100% of API test case generation and optimize code execution efficiency, reducing manual QA effort and accelerating feature release cycles by 2 days per release.
• Engineered end-to-end features for Zoho Catalyst Signals — a production SaaS event-driven platform — owning the full stack from UI components to backend Java/Spring Boot microservices, ensuring clean service boundaries and independent scalability across the platform.
• Collaborated with Product, QA, and Design teams across full delivery cycles, applying microservices design patterns including service decomposition to deliver secure, scalable, production-ready features.

• Built a full-stack College Database Management System as an independent training project, implementing frontend, backend,
and relational database design in Java, demonstrating production-ready fundamentals ahead of joining the core team.
• Resolved multiple critical backend defects in Zoho Catalyst Signals during onboarding, directly improving system stability and
processing reliability ahead of production milestones.

• Built a full-stack College Database Management System as an independent training project, implementing frontend, backend, and relational database design in Java, demonstrating production-ready fundamentals ahead of joining the core team.
• Resolved 15 critical backend defects in Zoho Catalyst Signals during onboarding, directly improving system stability and processing reliability ahead of production milestones.

• Built a full-stack College Database Management System as an independent training project, implementing frontend, backend, and relational database design in Java, demonstrating production-ready fundamentals ahead of joining the core team.
• Resolved multiple critical backend defects in Zoho Catalyst Signals during onboarding, directly improving system stability and processing reliability ahead of production milestones.