Leonardo Espinosa

Sr Test Automation Engineer with 5+ years of experience in manual and automation testing, leading agile QA teams across financial, automotive, and creative sectors. Skilled in Selenium and Robot Framework with Python/Java, experienced in CI/CD pipeline debugging. Passionate about AI Testing, Accessibility Testing, and mentoring. Experienced in designing test plans & test strategies.

Developed an open-source benchmark for LLM political bias and a blog about tech & art topics.

Technologies

Programming Languages:

Python, Java, JavaScript, Lua (basic)

Automation Frameworks:

Selenium, Robot Framework, Appium, Pytest, CodeceptJS, Cucumber, Cypress

API & Performance Testing:

Postman, SoapUI, JMeter

CI/CD & DevOps:

Git, Jenkins, Azure DevOps, GitHub Actions, Docker, Kubernetes

Cloud & Data:

Google Cloud Platform, Azure DevOps, Big Data GC

AI & ML:

Adversarial Testing, Red-Team Testing, Bias Testing

Databases:

SQL Databases, PostgreSQL, Big Data Concepts

Test Management:

Strategy & Plan Design, Jira, Confluence, TestRail, Xray, Zephyr

Professional Experience

Zurich Insurance — Hybrid

Automation Test Lead L4 (ZNA App Delivery) - October 2025 – Current

  • Owned automation for Insurance Project for ZNA
  • Created Mentoring and internal growth strategy to level up talent from mainly manual to hybrid automation manual testing.


Sr Test Engineer L3 (CROP Business Unit) - June 2025 – October 2025

  • Conducted functional testing on critical features for the CROP system.
  • Manually tested complex insurance workflows under tight deadlines.
  • Performed testing on LLM models using red-teaming techniques.
  • Utilized Azure DevOps pipelines for CI/CD validation.
  • Executed regression testing for minor and major releases.
  • Updated legacy test cases for latest versions.
  • Queried data with SQL for testing purposes.
Applica Inc — Remote

Sr Test Automation Engineer L3 - June 2024 – June 2025

Project: Acuity, SRS, Aeropay, Unqork

  • Automated testing with CodeceptJS, Appium, Robot Framework, and Selenium — reduced manual effort by 4 hours/sprint.
  • Improved test execution speed by 30% using optimized TestRail-based plans and cases.
  • Designed test plans & strategies covering 95% of requirements with zero critical defects escaping production.
  • Ran cross-browser/device tests with Sauce Labs ensuring consistent UX.
  • Logged and tracked 300+ defects, reducing post-release critical bugs by 30%.
  • Conducted UX testing with AXE DevTools to ensure accessibility for vulnerable users.
  • Built fintech-oriented automation frameworks — improved script reusability and maintainability.
  • Implemented CI/CD pipelines with Azure DevOps & Jenkins — accelerated defect detection by 60%.
  • Led a QA team of 5 engineers in Agile environments.
  • Mentored new hires and standardized QA processes — reduced onboarding time by 50%.
Wipro — Mexico City

Test Automation Engineer L2 - February 2024 – June 2024

Project: Ford

  • Automated regression tests with Selenium, Cucumber (BDD), and Slash — cut test execution time by 20%.
  • Developed API tests in Postman to ensure backend reliability.
  • Mentored 4 junior QAs, improving team automation maturity.
Keywords Studios — Mexico City

Test Engineer L2 - November 2022 – February 2024

  • Led manual QA for high-traffic gaming titles, ensuring functional and localization quality.
  • Executed regression testing for major and minor releases.
  • Contributed to test strategy design, reducing regression cycle time by 40%.
  • Piloted AI-driven testing initiatives to evaluate internal tool efficiency and ethics.
UNAM — Mexico City

Test Automation Engineer L1 - August 2020 – November 2022

  • Developed Selenium scripts in Python — saved 6 hours/week of manual work.
  • Created RESTful APIs for seamless system integration.
  • Managed Debian-based Linux server environments.

Education

  • Informatics Associate’s Degree — Colegio Oviedo Schöntal (2017–2019)
  • French Studies Semester — McGill University (2023)
  • Computer Systems Engineering Bachelor — UTEL (2023–2025)
  • Linguistics and Hispanic Literature Bachelor — UNAM (Ongoing)

Certifications

Languages

  • English: Fluent (C1)
  • French: Proficient (B1)

Portfolio

Check my projects here