Castellum interview process & guide 2026
Everything we know about interviewing at Castellum: what each round tests and compensation by level.
What Castellum actually tests for
How prominent each skill is across reported loopsFind the guide for your role
This is your next step: open the guide for the role you are interviewing for. Each one carries the questions Castellum interviewers actually ask that position, the loop structure, and pay by level.
What Castellum pays, by level
Estimated total compensation: base salary plus stock and annual cash bonus.
Castellum interview FAQ
Answered from real candidate and workplace dataHow much does Castellum pay for data roles?
Reported total comp for data roles at Castellum ranges from roughly $43k to $260k per year, varying by level, team, and location.
What topics does Castellum test in interviews?
Castellum interviews most often cover Predictive modeling, Machine learning (general), Statistical computing languages (Python), Statistical modeling, and Data mining. The exact emphasis depends on the specific role you apply for.
What roles can I prepare for at Castellum?
Dataford has interview guides for 1 role at Castellum, including Data Scientist.
Where is Castellum headquartered?
Castellum is headquartered in Gothenburg, Sweden.
Related company guides
Companies that hire for the same data roles
Ready for your Castellum interview?
Practice the exact questions from this guide with AI feedback, and walk into your loop knowing what to expect.