About the Role

We’re looking for a QA Engineer with a strong focus on manual testing of complex backend systems, who also has the skills and curiosity to build and evolve test frameworks. You’ll play a critical role in ensuring our systems are reliable, testable, and production-ready.

You’ll work closely with developers, product managers, and data engineers to understand how our systems work – then help break them in the right ways. While manual testing will be your day-to-day focus, you’ll also lay the foundation for automated tests (e.g., pytest, end-to-end pipelines, approval tests) to reduce regression risk and support future scalability.

Responsibilities

• Design and execute manual test cases for backend APIs, services, and data pipelines.
• Build and maintain a Python-based test framework (e.g., pytest, approval tests) for system-level and end-to-end validation.
• Collaborate closely with developers to understand architecture, identify risks, and develop effective test strategies.
• Own the quality gates in our development and release process.
• Participate in planning and refinement sessions to proactively catch unclear requirements or edge cases.
• Investigate and report bugs with clarity and precision.
• Drive the adoption of lightweight automation where it adds long-term value.
• Help define and refine QA best practices tailored to a fast-paced backend/data environment.

Requirements

• 3+ years of experience in manual testing of backend systems, APIs, or distributed architectures.
• Solid Python skills, ideally with experience using pytest or similar testing libraries.
• Comfortable reading logs, querying databases, and working with REST/GraphQL APIs.
• Experience with approval testing, end-to-end test orchestration, or data integrity checks is a plus.
• Clear communication skills – both in writing test cases and in reporting bugs.
• Familiarity with CI/CD tools and version control (e.g., Git, GitHub Actions, Azure DevOps) is a bonus.
• Passion for clean, testable systems – and a pragmatic approach to when and how to automate.

Nice to Have

• Experience with mocking/stubbing tools, contract testing, or test containers.
• Exposure to infrastructure or Kubernetes-based environments.
• Previous experience introducing or improving test frameworks from scratch.

What We Offer:

• An exciting and diverse role in an innovative and future-oriented company.
• The opportunity to manage and shape your own projects.
• Flat hierarchies, a dynamic team, and an open company culture.
• Opportunities for professional growth and development.

Please note, our office attendance is high, with employees working on-site four days a week.

We appreciate the interest of all job seekers in our organization. However, please note that at this time, we are unable to consider applications from outside of Hungary, who require a work permit for this position. We thank you for your understanding and encourage you to explore other opportunities with greehill in the future.