PhD student position in the Algorithms and Complexity group at University of Cologne

The Algorithms and Complexity research group led by Christian Sohler  
in the Computer Science Division
at University of Cologne invites applications for a research fellow  
position for candidates working
on areas of algorithms and data structures. The successful applicant  
will work towards a
doctorate as part of the position.

YOUR TASKS
  » organize practical training for courses, teaching support,  
conducting courses (totaling 4 SWS)
  » contribute to the general research conducted in the working group
  » present and publish research results at conferences and in journals
  » provide assistance with scientific self-administration


YOUR PROFILE
  » Degree in computer science, mathematics, or a closely related  
subject with excellent grades
  » extensive knowledge in the field of development and theoretical  
analysis of algorithms and data structures, as demonstrated by  
corresponding grades or scientific publications
  » very good oral and written communication skills in English
  » desirable: very good German language skills
  » desirable: proficiency in C/C++ or Python

The University of Cologne promotes equal opportunities and diversity.  
Women will be considered preferentially in accordance with the Equal  
Opportunities Act of North Rhine-Westphalia  
(Landesgleichstellungsgesetz – LGG NRW). We also expressly welcome  
applications from all suitable candidates regardless of their gender,  
nationality, ethnic and social origin, religion, disability, age,  
sexual orientation and identity.
The position is available from 1 April 2026 on a full-time basis  
(39,83 hours per week). The position is to be filled for a fixed term  
until 31 March 2028. If the applicant meets the relevant wage  
requirements and personal qualifications, the salary is based on  
remuneration group 13 TV-L of the pay scale for the German public  
sector.
Please submit your application (without a photo), including proof of  
the required qualifications, online under:  
https://jobportal.uni-koeln.de. The reference number is Wiss2512-17.  
The application deadline is 21 January 2026.

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