Leonardo Espinosa

Experience

1. Jan 2026 – Present

   SDET Lead

   Clip (PayClip) · Mexico City, MX Current

   • Partner with Architecture Design, Business, and Growth units to evaluate technical feasibility and profitability of upcoming projects, ensuring high ROI on engineering efforts.
   • Lead cross-functional E2E testing initiatives across distributed teams in China and Argentina — streamlining communication and synchronizing release cycles.
   • Architect testing frameworks for sharded database environments using SQL and Java-based tooling to ensure data integrity across high-volume fintech transactions.
   • Build scalable automation suites with TestNG and iTestNG to reduce time-to-market while maintaining the strict quality margins required for financial product growth.

   JavaTestNGSQLE2E TestingFintechSharded DBsDistributed Teams
2. Jun 2025 – Jan 2026

   L4 Test Automation Lead

   Zurich Insurance · Mexico City, MX · Hybrid

   • Automated testing with Python, Selenium, and Guidewire across complex insurance product workflows.
   • Performed LLM model testing using red-teaming techniques to evaluate output reliability and safety.
   • Used Azure DevOps pipelines to ensure CI/CD quality gates across all releases.
   • Performed regression testing for minor and major releases; migrated legacy test cases to a new environment.
   • Led a QA team of 3 engineers in an Agile development environment.

   PythonSeleniumGuidewireAzure DevOpsLLM TestingRed TeamingAgile
3. Jun 2024 – Jun 2025

   L3 Test Automation Engineer

   Applica Inc · Remote

   • Automated testing with CodeceptJS, Appium, Robot Framework, and Selenium — cut manual effort by 4 hours/sprint.
   • Improved test speed by 30% on new products via TestRail-based plans and cases.
   • Designed test plan and strategy reaching 95% requirements coverage with zero critical defects escaping production.
   • Ran cross-browser/device tests with Sauce Labs to ensure consistent UX across platforms.
   • Logged and tracked 300+ defects, contributing to a 30% reduction in post-release critical bugs.
   • Conducted UX testing with AXE devtools to validate usability and accessibility for vulnerable communities.
   • Built and maintained CI/CD pipelines with Azure DevOps & Jenkins — sped up defect detection by 60%.
   • Led a team of 5 test engineers in Agile environments; mentored new hires and cut ramp-up time by 50%.

   CodeceptJSAppiumRobot FrameworkSeleniumTestRailAzure DevOpsJenkinsAccessibility
4. Feb 2024 – Jun 2024

   L2 Test Automation Engineer

   Wipro · Mexico City, MX · On-site

   • Automated regression tests with Selenium, Cucumber (BDD) — cut test time by 20%.
   • Built API tests in Postman to ensure backend reliability.
   • Mentored 4 junior QA engineers, boosting team automation skills.

   SeleniumCucumberBDDPostmanJava
5. Nov 2022 – Feb 2024

   L2 Test Automation Engineer

   Keywords Studios · Mexico City, MX · On-site

   • Led manual QA for high-traffic game titles — ensured functional and localization quality.
   • Executed full regression testing for major and minor patches and releases.
   • Assisted in design of test plan and strategy, reducing regression cycle time by 40%.
   • Piloted AI-driven testing for internal tools — evaluated efficiency and ethical implications.

   Manual QARegression TestingLocalizationGame TestingAI Testing
6. Aug 2020 – Nov 2022

   L1 Automation Engineer

   UNAM · Mexico City, MX · On-site

   • Developed Selenium scripts in Python — saved 6 hours/week in manual tasks.
   • Created RESTful APIs for seamless system integration.
   • Worked on Debian-based Linux servers.

   PythonSeleniumREST APIsLinux

Technical Skills