Surabhi Sonkhaskar

• Designed and implemented a multi-tier distributed cache layer using Redis, eliminating redundant Certificate Authority (CA) lookups, reducing CA system load by 90%, and cutting P99 latency from ~150–200ms to ~15–20ms under peak traffic.

• Engineered the C integration layer for Redis caching, authored Lua scripts for atomic conditional writes, and designed event-driven cache invalidation via Redis Pub/Sub to ensure data consistency across distributed nodes.

• Led a two-phase production rollout of the caching system across Zscaler's global cloud infrastructure, eliminating near-weekly SEV1 outages and delivering predictable sub-20ms response times at scale.

• Architected and launched the Sidebar service as an independent control plane for policy enforcement and inter-service coordination, decoupling CA from its role as a system bottleneck and accelerating feature velocity across Zscaler Cloud.

• Diagnosed and resolved complex memory leaks in legacy C/C++ systems, refactored critical code paths, and improved runtime efficiency, resulting in measurable performance gains and greater platform stability.

• Mentored and led 4 junior engineers through design reviews, code reviews, and technical guidance, fostering team growth while maintaining high engineering standards.

• Partnered with product managers to define requirements, scope technical solutions, and deliver product enhancements adopted by Fortune 500 enterprise customers.

• Built and integrated a custom Kafka connector to transmit messages between TCP sockets, accelerating system-wide update broadcasts and improving efficiency in the core cloud architecture.

• Maintained and optimized a high-transaction financial reporting platform processing 10M+ daily transactions in C++, then led the strategic migration to Java to improve long-term scalability, maintainability, and developer productivity.

• Improved reporting performance by 30% by developing automated utilities that streamlined daily business report generation and analysis workflows.