I applied through an employee referral. I interviewed at Roblox (San Francisco, CA) in Feb 2021
Interview
I had a short phone call with a recruiter and then scheduled a 1-hour video screen with a Karat engineer.
On the video screen, I was asked two coding questions and a follow-up for the second one. I finished both and passed the tests, and provided a solution for the follow-up, but I got the reject email a couple of days later after the interview surprisedly.
Interview questions [1]
Question 1
1. Validate if a string contains all characters in another string.
2. Word search and output all possible paths.
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.