Enlightening Science
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 X-ray Operations group we are looking for an
Postdoctoral Researcher
The Position
Recent advances at the European XFEL have enabled lasing in a cavity-based X-ray free-electron laser oscillator (XFELO). This milestone opens new perspectives for X-ray generation and high-precision experiments. To advance the XFELO program to the next level, we are seeking a highly motivated Postdoctoral Researcher to support a joint team of scientists and engineers from European XFEL and DESY.Key responsibilities:
- Further develop, optimize, and operate the existing XFELO demonstrator setup (hardware, beamline components, and experimental procedures). Contribute to the conceptual design of a tunable XFELO device, including performance studies, technical trade-offs, and interface definitions.
- Plan, prepare, and execute XFELO-related experiments—both internal measurements and experiments in collaboration with internal and external user groups.
- Analyze experimental data, document results, and contribute to publications, internal reports, and technical notes.
- Co-organize and support workshops and meetings related to XFELO science, technology, and future development (agenda, speakers, documentation, follow-up actions).
Requirements
- PhD in Physics, Accelerator/Photon Science, Engineering, or a closely related field (completed by the start date).
- Demonstrated ability to conduct and publish high-quality research (e.g., peer-reviewed publications, conference contributions).
- Hands-on experience in at least one of the following areas: free-electron lasers (FELs), optical cavities/oscillators, X-ray optics, accelerator or beam diagnostics, beamline instrumentation, or experimental operation at a large-scale user facility.
- Solid understanding of X-ray optics and fundamentals of FEL and accelerator physics relevant to XFELO operation.
- Strong data analysis and scientific programming skills (e.g., Python; MATLAB and/or C/C++ are an advantage).
- Excellent communication skills in English (written and spoken) and the ability to work effectively in an interdisciplinary, international team.
Reference Number
S-642
Duration
This appointment is initially limited to 3 years, an extension will be possible by later decision.
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
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.
Application Deadline:
25/03/2026 