Prospective postdoctoral researchers can apply through the joint Aalto University–University of Helsinki postdoc calls, organized regularly by HIIT. The funding period for Postdoctoral Fellows is generally 2 years with a possible 1-year extension. For more senior Research Fellow candidates, the funding period is generally 3 years with a possible 2-year extension.
If you already have a prospective supervisor or partner in Helsinki IT research and the postdoc call is closed, see the Focused recruitment section under For PIs: Recruit a researcher via HIIT.