I did foobar and was contacted by a recruiter.

The whole process was long, taking around 2 months.

There were 6 rounds:

• One phone screening
• Five "onsite" interviews (via Internet due to the lockdown):
  • Three 45-minute coding challenges
  • One system design interview
  • One soft-skill interview

Coding challenges were typical whiteboard questions (one warm-up, main challenge, and follow-up questions). Nothing new here; they were variations of problems found on any coding challenge website.

1. Find a path in a weighed graph.
2. Traverse a tree.
3. Given a system that can change recursively with several options for every step, find whether a specific state is possible.