Ajay Seth

About Ajay Seth

Highly proficient Performance Engineer (8+ years) specializing in deep-dive bottleneck analysis and root cause identification across complex distributed systems. I take a proactive, detail-oriented approach to performance analysis, utilizing advanced diagnostic tools to resolve issues related to database concurrency, network latency, and memory management before they impact production. Experienced in collaborating seamlessly with DevOps and QA teams to automate testing and monitoring, guaranteeing the delivery of highly scalable and exceptionally reliable software solutions.

Experience

1. Senior Staff Software Development Engineer

   Zscaler

   Oct 2021 — Present

   Developed and owned the entire End-to-End Performance Testing Framework from scratch, building thecore testing mechanism using k6 to simulate high-volume, concurrent isolated browser sessions. Thisfoundation ensured comprehensive, realistic performance measurement across the platform.• Owned the performance strategy and requirements for the product, defining and documenting stringentNon-Functional Requirements (NFRs) for key metrics like rendering latency and system throughput. Thisstrategic work guided all subsequent development and testing efforts.• Created accurate workload models that simulated realistic user behavior, geographical distribution, andtraffic patterns across the globe. This step ensured all performance tests provided actionable capacityinsights that mirrored live production usage.• Contributed to early Architecture Reviews by applying the Shift-Left approach, providing criticalperformance, scalability, and cost-efficiency feedback to influence high-level design decisions.• Owned end-to-end performance coverage as the Individual Contributor (IC), successfully dictating theroadmap and addressing all system bottlenecks from the initial design phase through productiondeployment.• Managed and tuned Kubernetes resource values (CPU/Memory limits) for isolation pods and test executors,ensuring both cost-effective performance and reliable resource segregation within the containerizedenvironment.• Executed comprehensive performance testing strategies (Load, Stress, Soak, Scalability) specificallytailored for the unique cloud isolation architecture, including streaming protocols and regional deployments.• Conducted in-depth Root Cause Analysis (RCA) by collaborating across teams to drill down into code,configuration, database queries, and underlying cloud infrastructure. This process accelerated issueresolution and performance fixes.

Education

• Integral University

  Bachelor of Technology - BTech, Information Technology