I applied online. The process took 2 weeks. I interviewed at Roblox (San Francisco, CA) in Mar 2021
Interview
First, I had a call with a recruiter, everything were smooth, the position was interesting for me and my background seemed like a good fit. We agreed to proceed to the next stage.
On the next stage there was a technical interview via Karat platform - so they are outsourcing some of their interviews. It was pretty standard technical interview, I solved the problem and we had some time to chat. Interviewer had not idea about tech I worked with (big data stuff like Apache Spark) so this talk was really awkward.
Aaaand they ghosted me. Never received any reply from Roblox. I did send an email to the recruiter after 2 weeks of waiting, but no reply either.
Interview questions [1]
Question 1
Standard leetcode medium problem with extra limitation after I submitted my 1st solution.
Reach out by recruiter, set up phone screen interview. 60 min coding interview. A leetcode style question with 3 follow up , overall experience is good got reject 2 weeks afterward.
The phone screen was surprisingly technical and lasted about 45 minutes, diving straight into system design. I was asked to design a leaderboard service, which caught me off guard at first. But as I started to outline my approach, I realized it was similar to a challenge I’d practiced on prachub.com just days before. The subsequent technical rounds were intense, focusing on DSA problems and scalability issues. In the end, I got an offer that I happily accepted, despite the difficulties I faced throughout the process.
Interview questions [1]
Question 1
Design a leaderboard service that supports tens of millions of concurrent players. Cover top-K queries, neighbor-rank queries, partial sharding, and consistency tradeoffs.
Reached out by HR and chatted with a hiring manager. Mostly Behavioral questions such as why you want to work at roblox. The conversation was great and smooth. But they rejected me after a few days.