I applied online. The process took 3 weeks. I interviewed at Roblox (San Mateo, CA) in Jun 2016
Interview
I initially applied for the Full Stack Engineer position through AngelList. A recruiter contacted me, and through discussion discovered that the devops position would be a better match. Then there was a technical phone screen of standard difficulty. Then I was invited for an on-site interview lasting a few hours. I was interviewed by several team members discussing my previous projects, and answered technical questions (whiteboard coding).