Selvakumar S

Backend Software Engineer with 4+ years of experience building scalable Java microservices, distributed systems, and multi-tenant SaaS platforms. Skilled in system design, event-driven architecture, and optimizing performance, scalability, and high availability, with end-to-end feature ownership in Agile teams

Member of Technical Staff (SDE) – Backend at ZOHO (2023-09 – Present)

• Built cloud-native Java microservices on Zoho Cloud Platform (AWS-equivalent) using a Spring Boot style framework for a multi-tenant SaaS platform. It manages ~100K endpoints across ~500 tenants for provisioning, compliance, monitoring, and automated remediation.
• Reduced p99 latency by 67% (~1.2s → ~400ms) on high-traffic device and inventory REST APIs. Also cut PostgreSQL load by ~30% via SQL query optimization, indexing, and Redis caching.
• Built event-driven asynchronous Kafka workflows processing ~1M events/day at 99.9% success. Used idempotent consumers, exponential-backoff retries, distributed scheduling, and thread pools.
• Developed scalable RESTful microservices on PostgreSQL for an Extension Platform (Sensors, Scripts, Remote Actions, Workflows, Dashboards) at ~60 req/sec. Used API versioning, backward-compatible changes, dependency management, and schema migrations for zero-downtime releases.
• Reduced production incidents by ~20% through structured logging, centralized exception handling, telemetry, observability, and automated failure recovery.
• Built and security-reviewed cross-platform PowerShell scripts for Windows, macOS, and Linux, applying OS-level knowledge to detect and auto-fix crashes, hard resets, slow startup, input lag, and performance and connectivity issues; fixed command-injection, fail-open, and exit-code bugs.
• Owned 8+ features end to end across the full SDLC: architecture, technical design, implementation, unit/integration testing, CI/CD, documentation, and production support, working closely with frontend, backend, and QA teams for seamless delivery and integration. Reviewed 100+ PRs on API design, concurrency, multithreading, and performance, and mentored 2 junior engineers.

Member of Technical Staff (SDE) – Desktop Applications at ZOHO (2022-09 – 2023-09)

• Built real-time meeting synchronization for the Zoho Meeting Windows app (C#,.NET) using REST APIs and WebSockets.
• Resolved long-running memory leaks (70% fewer memory issues) and cut memory usage by 35% across 1,000+ meetings’ metadata and recordings.
• Optimized SQL data access for 50% faster CRUD and 1.2s faster startup. Improved UI response by 40% using MVC and design patterns, collaborating with backend, mobile, and QA teams.

Bachelor of Engineering (B.E.) in Electronics and Communication Engineering (ECE) – Chennai Institute of Technology (2018-08 – 2022-05)