Daily Coding Problem is a good way to keep your interviewing skills sharp (or at least I think that's what it might help with) - https://dailycodingproblem.com/
- 1 (google)
- 2 (uber)
- 3 (google)
- 4 (stripe)
- 5 (jane street)
- 6 (google)
- 7 (facebook)
- 8 (google)
- 9 (airbnb)