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SEON is a fraud prevention and AML compliance platform serving thousands of companies globally, including Revolut, Wise, and Bilt. The company has achieved 95% fraud reduction and 32x ROI for customers through 900+ real-time, first-party data signals.
You will serve as a Quality Steward for critical backend services and APIs, owning end-to-end quality for key product areas. This is a hands-on, senior role where you'll design and implement automated test suites in Python, lead test strategy decisions, and raise the quality bar with every release. You'll act as a technical leader—not just writing tests, but driving conversations about test approach, proposing solutions, and helping the team ship faster with confidence.
Key responsibilities include:
- Design, implement, and maintain automated test suites in Python covering API, integration, and service-level testing
- Lead automation design decisions: what to automate, where it sits in the test pyramid, and how to keep suites stable, fast, and maintainable
- Build and improve the Python test framework with focus on reliability, clarity, speed, and ease of contribution
- Partner with developers and product managers during requirements and design phases to build testability into system architecture
- Debug complex failures across environments using production telemetry (logs, metrics, traces)
- Define and maintain CI/CD quality gates in GitHub, including test execution, failure triage, and release readiness criteria
- Develop practical test data strategies supporting both automated and exploratory testing
- Contribute to non-functional testing: performance, reliability, and security (authorization boundaries, tenant isolation, abuse paths)
- Mentor other QA engineers and developers on Python automation best practices
- Participate in active migration of Python automation suite to Playwright, contributing to framework decisions and implementation
The role is based in Budapest on a hybrid schedule.
REQUIREMENTS:
- 4+ years of experience in QA automation or Test Engineering with deep, hands-on Python automation development as primary skill
- Strong API testing experience: designing, building, and maintaining API test suites using Python-based frameworks (pytest, requests, httpx, or similar)
- Solid understanding of REST APIs, web services, and event-driven systems, including testing with mocks, contracts, and controlled test data
- Proven experience building and maintaining automation inside CI/CD pipelines, including test execution, reporting, and flaky test management in GitHub Actions or similar
- Clean, reusable Python code with thoughtful design patterns and focus on long-term maintainability
- Confidence leading technical discussions on test strategy, coverage tradeoffs, and automation approach
- Comfort using modern AI tools to multiply velocity, treating AI-generated output as a starting point while applying rigorous engineering judgment
NICE TO HAVE:
- Playwright experience or genuine interest in learning it
- Contract testing experience using Pact or similar tools
- Performance testing experience, k6 preferred
- Docker and cloud-native familiarity, plus experience with microservices architectures
- Test management and traceability experience using TestRail, Testmo, or similar
