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Student Assistant / Hiwi Electrolysis Characterization

Published:

Dec 19, 2025

(f/m/d)

Freiburg im Breisgau, Germany

Job Type: 

full time/part time

ionysis is looking for a HiWi / Master Student

ionysis develops next-generation membrane electrode assemblies for electrochemical converters like electrolysis cells for the generation of green hydrogen. Spun out from the university in 2022 and based in beautiful Freiburg, we are looking for a student assistant / Hiwi student (f/m/d). You will support our electrolysis tech team with electrochemical testing of novel components.

 

What we do

 

To stop climate change and reach Net Zero, ionysis seeks to decarbonize industry with innovative electrochemical devices. We focus on the core of any electrochemical converter: the membrane electrode assembly (MEA). We develop and manufacture MEAs based on the most performant fluorine-free materials for hydrogen technology, including fuel cells and electrolysers. As a spin-off from Hahn-Schickard and the University of Freiburg, we combine scientific excellence with entrepreneurial spirit to bring our innovations to market and scale.

Your responsibilities 

  • Assembling electrolysis cells for laboratory experiments 

  • Conducting electrochemical tests at our anion-exchange and proton-exchange membrane electrolyzer test benches 

  • Reviewing and interpreting test data 

  • Preparing and presenting results in technical team meetings 

  • Supporting general laboratory organization and experimental setup 

 

 

Your qualifications 

 

  • Strong team player and getting-things-done mentality 

  • Enrolled in a Bachelor’s or Master’s program in chemical engineering, materials science, microsystems engineering, physics, or a related field (e.g. Sustainable Systems or Sustainable materials) 

  • Interest in electrolysis, electrochemistry, or energy materials. 

  • Practical skills in laboratory work are preferred; experience with electrochemical measurements or data analysis is an advantage. 

  • Independent, reliable, and team-oriented working style. 

  • Proficiency with common office software and typical data evaluation tools 

  • Business fluency in English 

 

What we offer  

 

  • Opportunity to join a leading German green-tech start-up  

  • A young and diverse team with flat hierarchies, valuing collaboration with each other no matter your role at ionysis 

  • Modern & well-equipped offices and labs in Freiburg on the campus of the technical faculty 

  • Flexible working hours between 20-80 h / month 

  • Duration of 6 months with the possibility for extension or B.Sc. / M.Sc. thesis 

before you apply

Make sure you application is complete:

  • CV

  • Short motivational letter

  • Certificates

  • References, if applicable

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Send your application as one PDF file to Lena Kehry via  hr@ionysis.com

apply
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