Sahil Kumar
Gurgaon
Summary
Forward-thinking SDET with over 5 years of experience specializing in Python development, advanced automation frameworks, and networking protocols. Proven track record of accelerating development cycles, including thrice-promoted trajectories and receiving top-tier performance awards for high organizational impact. Expert in architecting next-generation, Agentic AI testing pipelines using Claude, Playwright MCP, and RAG modules to automate end-to-end testing workflows from specification to execution. Adept at leading zero-to-one product QA strategies, benchmarking system performance, and designing highly scalable test architectures that maximize cross-functional engineering efficiency.
Overview
5
5
years of professional experience
Work History
Senior Member
D. E. Shaw & Co
Gurgaon, India
12.2024 - Current
- Built an end-to-end API test automation framework for the HC Dev team using Pytest, slashing manual regression testing efforts by 80%.
- Engineered and managed unified UI and API GitHub Actions CI/CD pipelines for the HC Dev team; configured automated daily regressions, manual on-demand triggers, that dynamically archive test artifacts and transmit real-time execution alerts, cutting pipeline configuration overhead by 30%
- Co-architected a hierarchical multi-agent AI framework using Claude and Playwright, Jira and GitHub MCPs to ingest specs, analyze codebase changes, and validate implementation fidelity; automated browser/API regressions and modernized stale test coverage, dropping onboarding time from days to under 60 minutes while significantly accelerating P0 E2E validation cycles.
- Engineered a context-aware RAG module for the HCDev Plexus Project to eliminate manual context-seeding, improving AI agent execution accuracy by 65% and eliminating redundant manual prompt configuration.
- Designed a Vision-AI Figma-to-Code Auditor using Claude skills and Figma MCP to compare UI/UX mocks against the active developer codebase, catching 90% of structural visual regressions and missing features prior to formal QA test execution cycles.
- Developed an automated "Feature Bug Hunter" agent that cross-referenced Jira tickets with repository code and historical defect data to identify logic bugs, shifting defect detection left and catching critical flaws during early development phases before code reached staging environments.
- Led QA strategy from scratch for Plexus (an enterprise performance review system), enforcing an "Automate-as-you-Test" methodology that intercepted 300+ early-stage issues, resulting in high-quality feature delivery and a 50% increase in overall team delivery throughput.
Software Engineer 1
Zscaler
Bangalore, Karnataka
09.2023 - 11.2024
- Engineered an OS-independent pytest automation framework for ZIA, ZPA, and ZDX, cutting testing time by 50% and increasing test coverage by 75%.
- Directed , designed and implemented a cutting-edge Result Management System, storing and analyzing automation test results, resulting in a 80% reduction in test result analysis time.
- Mentored new joiners , accelerating project completion milestones.
- Conducted comprehensive manual testing for the ZCC Events feature, identifying and resolving 30+ critical issues in a feature utilized by thousands of ZCC devices, automating the feature, leading to a 50% reduction in execution time.
Associate Software Engineer 2
Zscaler
Mohali, Punjab
10.2022 - 08.2023
- Built an industry-standard Python-based automation framework for Zscaler Mobile QA, streamlining the transition from the legacy system and boosting testing efficiency by 40%.
- Led the development and deployment of a service monitoring framework for the Zscaler client connector, cutting manual effort for longevity testing by 99%.
- Executed manual and automated API testing for the Mobile Admin Gateway, reducing manual efforts by 70% and enhancing reliability and speed.
Associate Software Engineer 1
Zscaler
Mohali, Punjab
02.2021 - 09.2022
- Developed an end-to-end code base for the ZPA team, enhancing API test automation, boosting test coverage by 35% and streamlining the testing process.
- Automated backlog NFT cases using best practices, reducing testing time by 25% and improving test reliability.
- Optimized the automation framework, ensuring smooth daily executions and increasing test efficiency by 25%.
Education
B.Tech - Computer science
Chandigarh Group Of Colleges
Mohali, Punjab07.2021
Skills
- Python
- Pytest
- Agentic AI, RAG, MCP
- Desktop and Mobile Automation
- Computer Networks ( TCP/IP, UDP, DHCP, DNS )
- API Testing
- Git
- CI / CD
- SDLC
- Agile Methodology
- Jira
- Selenium / Appium
- Jmeter
- Integration Testing
- Performance Testing
Languages
English
Advanced (C1)
Hindi
Advanced (C1)
Awards
- Zscaler's Bravo Award, 07/2023
Patents
- Emergency Resuce Services With Smart Traffic System
Timeline
Senior Member
D. E. Shaw & Co
12.2024 - Current
Software Engineer 1
Zscaler
09.2023 - 11.2024
Associate Software Engineer 2
Zscaler
10.2022 - 08.2023
Associate Software Engineer 1
Zscaler
02.2021 - 09.2022
B.Tech - Computer science
Chandigarh Group Of Colleges