Responsibilities

We are seeking a Senior QA Engineer to join our Card Processing team
You will design and build the quality systems that keep our payment platform reliable at scale - in an environment where new code is produced using AI tooling and judgment is the bottleneck, not generation speed
This is not a traditional “write and execute test cases” role
We believe software engineers own their tests — your job is to make them better at it
You will own the sensor strategy that catches what AI gets wrong, verify that test intent matches business requirements, and raise the quality bar for the entire team
Design and implement layered quality sensors across our CI/CD pipeline — from static analysis to AI-driven code review passes
Improve and maintain E2E test suites for critical payment flows (card authorisation, clearing and settlement, tokenisation, 3D Secure)
Review PRs for test intent alignment — ensuring AI-authored and human-authored code meets the same quality bar
Identify test coverage gaps and prioritise them by risk (customer impact, regulatory exposure)




Build load testing and performance validation frameworks
Collaborate with the team on quality strategy — you raise the bar, you don’t gatekeep it
Explore chaos engineering approaches to validate system resilience
Contribute to audit-trail thinking — ensuring generated diffs and suppressed checks are traceable and defensible
Benefits

Ongoing learning and development opportunities
Retirement planning
Charitable donation matching
Volunteer opportunities
Employee development fund
Monthly happy hours
Free haircuts in our salon located at HQ
Complimentary dry cleaning at HQ
Valet parking at HQ
Shuttle service to/from NYC
Gym located at HQ
River Cafe at HQ
Qualifications

~ Strong proficiency in English — written and verbal
~ Familiarity with CI/CD pipelines, containerisation, and infrastructure-as-code
~ Experience testing RESTful APIs and event-driven systems
~ Strong analytical thinking — you pull bugs back t

📌 Senior Engineer, Software Test Engineering (España)
🏢 Cross River
📍 España