Devon Castellano — QA Automation Engineer
Raleigh, NC
Test engineer who moved from a hospital diagnostics bench into software testing in 2023. Built the Playwright suite that now gates every release of a scheduling product used by 1,200 clinics, taking escaped defects from 19 a quarter to 4.
Experience
QA Automation Engineer, Verdal Health Systems · September 2024 – present
Release quality for a scheduling product used by 1,200 clinics.
- Built the Playwright suite that gates release, covering 118 flows and finishing in 9 minutes on four shards; escaped defects fell from 19 a quarter to 4.
- Replaced a six-hour manual regression pass with an automated smoke run, freeing two testers for exploratory work on the booking rewrite.
- Wrote the quarantine rule that pulls a test after two non-deterministic failures, taking suite reliability from 86% to 99.2%.
- Added contract tests between the scheduler and the billing API, catching a field rename that would have dropped 3,000 appointments.
QA Analyst, Foxhill Software · March 2023 – August 2024
- Wrote the first automated API checks for a claims tool, moving 240 manual cases into a nightly run that reported before standup.
- Rebuilt the bug template around reproduction steps and environment detail; developer requests for clarification dropped by two-thirds.
- Tested the record-import path against 14 malformed real-world files and found three crashes that had already reached production twice.
Clinical Laboratory Technician, Rowan Diagnostics · June 2019 – February 2023
- Ran 60 specimen assays a shift under CLIA protocol, holding a documented error rate below 0.3% across four years.
- Automated the daily quality-control log in Python, replacing a paper checklist and cutting shift close-out from 45 minutes to 5.
Education
- B.S. Biology · University of North Carolina at Chapel Hill · August 2015 – May 2019
Skills
- Automation: Playwright, Cypress, pytest, Postman, k6
- Languages: TypeScript, Python, SQL, Bash
- Practice: Test strategy, CI gating, Exploratory testing, Accessibility checks, Defect triage
Certifications
- Certified Tester Foundation Level — ISTQB
- GitHub Actions Certification — GitHub
