Dear all, We are delighted to advertise a PhD position on the subject of double category theory at Tallinn University of Technology (Estonia), which will be jointly supervised by me (Bryce Clarke <https://bryceclarke.github.io/>) and Nathanael Arkor <https://arkor.co/>. The deadline for applications is the 10th of November 2026. The anticipated start date is early 2027, though there is some flexibility. The duration of the PhD programme is 4 years, with a gross monthly salary of €2300. Further information, including a project description, may be found at the following link: https://taltech.teamdash.com/p/job/5RVnLhRx/universal-properties-in-double-c... The PhD candidate will be based in the Logic and Semantics Group <https://cs.ioc.ee/lsg/>, which works closely with the Compositional Systems and Methods Group <https://compose.ee/> in the same department. The groups cover a broad range of research interests including the theory and applications of category theory, theoretical computer science, and logic. We encourage anyone interested in applying for this position to contact us directly, before submitting an official application, with a cover letter, CV, and a copy of your master's thesis (if completed). Please do not hesitate to contact us if you have any questions. Best regards, Bryce Clarke <bryce.james.clarke@gmail.com> Nathanael Arkor <n@arkor.co>