Marcus D. Ellery

Profile

Senior Automation Engineer with 9 years of experience designing and scaling test automation frameworks for SaaS and embedded systems products. Specializes in CI/CD-integrated test pipelines, Selenium/Playwright-based UI automation, and API contract testing using Postman and RestAssured. Reduced regression cycle time by 74% at current employer and cut production defect escape rate by 40% year-over-year.

Work Experience

Senior Automation EngineerMar 2021 - Present

Vantex Systems, Austin, TX

Architected a Playwright-based end-to-end test suite covering 1,200+ user flows, reducing manual QA effort by 68% and cutting release cycle from 3 weeks to 5 days.
Integrated automated regression pipeline into GitHub Actions CI/CD, achieving 94% pass-rate stability across 18 concurrent browser/OS configurations.
Mentored 4 junior engineers in BDD practices using Cucumber and Gherkin, lifting team test coverage from 41% to 87% within two quarters.

Automation Engineer IIJun 2018 - Feb 2021

Clarifield Health Tech, Dallas, TX

Built a RestAssured API test framework that validated 320+ endpoints, catching 95% of contract regressions before staging deployment.
Reduced flaky test rate from 22% to under 3% by refactoring Selenium page-object models and introducing explicit wait strategies across 600 test cases.
Collaborated with DevOps to containerize test execution using Docker and Kubernetes, cutting infrastructure spin-up time by 55%.

QA Automation EngineerAug 2015 - May 2018

Brightline Software, San Antonio, TX

Developed a data-driven test harness in Python and pytest that automated 80% of smoke and sanity checks previously run manually each sprint.
Created performance benchmarks using JMeter for a B2B portal handling 50,000 daily active users, identifying 3 critical bottlenecks before GA launch.
Documented 200+ test plans and defect reports in Jira, reducing average bug triage time from 4 hours to 45 minutes per cycle.

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