The process took 4 weeks. I interviewed at Roblox (Redwood City, CA) in Nov 2011
Interview
The recruiter somehow got my resume and approached me. The company is on the edge of spanning so it is looking for a bunch of new positions. I showed the interest on doing backend server side programming. As a result, I was arranged for a first on-site interview with the technical director. However, this interview is just a chat about my background, some general issues on the backend design. Then after two weeks, I was arranged another round of on-site interview with 4 people. The interviews did not contain too many algorithm or programming puzzles, but really some advance questions that fit their needs.
Interview questions [1]
Question 1
What is a virtual function and how is it implement?
Took an OA. Pretty difficult leetcode style questions and some games (Roblox games and psychology based games to determine personality traits). I did not get through the initial online assessment.
One standard hr phone call then one 60 min phone screen. Nothing out of the ordinary. Phone screen was done on codesignal where you could see code compile and run
Interview consisted of two leetcode style questions and two "games" that tested problem solving and optimization. Coding questions were of medium/hard difficulty. The games were difficult as the instructions given were terrible and unintuitive.