Test Engineer for Data Services (f/m/d)

European XFEL is an international non-profit company located in the Hamburg area in Germany. It operates a 3.4 km-long X‑ray laser, which produces X-rays of unique quality for studies in physics, chemistry, the life sciences, materials research and other disciplines. The diverse scientific facilities at European XFEL enable scientists from across the globe to carry out a wide range of experimental techniques.

For our Controls group we are looking for a Test Engineer for Data Services (f/m/d)

The Position

• Develop and maintain automated tests and testing libraries for the Data Acquisition System (DAQ) and the Calibration Environment (CAL) based on the Control System Karabo
• Design and implement end-to-end test solutions, from writing test cases based on system requirements to designing and developing reusable test libraries
• Support and enhance the automated testing infrastructure, including an in-house developed web-based TestPortal
• Collaborate closely with Developers and other QA Engineers in the Data Department to ensure the quality and reliability of complex distributed systems
• Analyze test results, investigate failures, and contribute to continuous improvement of test coverage and system stability
• Contribute to the design of a test strategy for Karabo's web interface – help define appropriate tools and frameworks, propose architecture and structure for the tests
• Contribute to the support the Controls Group provides to the company

Requirements

• Bachelor or higher degree in Computer Science or a similar technical field of study (e. g. Engineering, Physics or Mathematics)
• Minimum three years of proven experience in test automation
• Solid knowledge of Python and Robot Framework
• Familiarity with Squish, and Git is a strong plus
• Experience in building testing solutions for web interfaces with Playwright is a plus
• Experience using the scientific data format HDF5 and corresponding libraries is an asset
• Ability to independently design and implement automated tests, including test case design, test library architecture, and framework-level development
• Solid understanding of testing strategies for complex distributed systems
• Good communication skills in English are a must
• Due to the collaborative and hands-on nature of the role regular on‑site presence is a must. Availability for occasional on-call, and on-site support is required

For additional information, please contact Anna Klimovskaia ([email protected]).
Working place will be Schenefeld in the Hamburg metropolitan area. General information on working in Germany, the Hamburg area and the European XFEL can be found here.

Our offer
Become part of a vibrant international and multi-cultural team of scientists, engineers, technical and administrative staff. Be involved in cutting edge scientific and technical progress and participate in our international networks. Experience our atmosphere of tolerance and respect.
Salary and benefits are similar to those of public service organizations in Germany, this includes for example:

• family friendly working environment (e. g. additional childcare days)
• flexible working times and option for work from home depending on tasks
• 30 days of vacation, 24th and 31st of December are free as a courtesy of the employer
• extensive relocation benefits
• generous company pension scheme (6,45 % of monthly salary)
• monthly social events and subsidized company restaurant
• partially financed job-tickets for public transportation
• extensive training opportunities incl. subsidized English and German language classes
• easy and free access to a mental health platform to support your wellbeing

Our company language is English.

Reference number: E-397
Duration: This appointment is limited to 3 years.

Application
Please provide your CV and a motivation letter in English as well as any reference letters.
The European XFEL GmbH is an equal opportunity and affirmative action employer and we promote and support diverse and heterogenous teams. Applicants with disabilities will be given preference over other equally qualified applicants.

Deadline: 15 October 2025

European XFEL GmbH
Holzkoppel 4, 22869 Schenefeld, Germany
www.xfel.eu