Roblox Interview Process & Rounds
Roblox runs a conventional loop with an unusually concentrated question set. The phone screen (店面/电面) is a single coding problem, and two questions dominate it: a sliding-window rate limiter reported 29 times and a most-frequent call-path problem reported 22 — together a third of everything in this corpus. Both arrive as graded parts submitted one at a time, and both have a follow-up that is where candidates lose the round rather than the base problem. The onsite (昂赛/VO) adds system design, most often like/unlike at scale, delayed payments, or game matching, plus a project deep dive. Behavioral is not one round but a ladder — an HR screen of about three questions, one or two HM rounds, and at director or VP level a checklist-style round where tenure and proactive decision-making get scrutinised; reports describe candidates rejected at hiring committee specifically for short job tenures. There is also a distinct HackerRank OA with a multi-part coding section and a 20-minute multiple-choice behavioral section.
Key facts
- •4 distinct round types
- •34 questions reconstructed from 212 candidate reports
- •Reports span Feb 2025 – Aug 2026
- •Refreshed monthly · last updated August 2026
The Roblox loop, from candidate reports
Roblox runs a conventional loop with an unusually concentrated question set. The phone screen (店面/电面) is a single coding problem, and two questions dominate it: a sliding-window rate limiter reported 29 times and a most-frequent call-path problem reported 22 — together a third of everything in this corpus. Both arrive as graded parts submitted one at a time, and both have a follow-up that is where candidates lose the round rather than the base problem. The onsite (昂赛/VO) adds system design, most often like/unlike at scale, delayed payments, or game matching, plus a project deep dive. Behavioral is not one round but a ladder — an HR screen of about three questions, one or two HM rounds, and at director or VP level a checklist-style round where tenure and proactive decision-making get scrutinised; reports describe candidates rejected at hiring committee specifically for short job tenures. There is also a distinct HackerRank OA with a multi-part coding section and a 20-minute multiple-choice behavioral section.
What does Roblox ask in each round?
Roblox interviews span 4distinct round types, shown below. Counts reflect distinct questions per round across the loops we’ve indexed.
- •Clarifying the exact window or tie-break convention before writing code — the reported prompts are ambiguous on both, and the two readings give different answers.
- •Finishing the first coding part fast. Reports are consistent that time is short and the later parts carry the signal.
- •Naming Redis keys and DB queries concretely in system design instead of staying at box-and-arrow level.
- •Driving the system design round rather than waiting for prompts, and raising the hot-item problem unasked.
- •A structured STAR narrative for the proudest project, with a prepared answer for job changes and short tenures.
- •Failing the hidden test case on the rate limiter's second part — two separate reports pass the visible tests and fail a hidden one.
- •Writing real concurrency for the call-path multi-thread follow-up, when the logs merely carry a thread_id and grouping is all that is asked.
- •Staying high-level in system design; one candidate with otherwise positive feedback was rejected for not describing the Redis key and the read/write query.
- •A generic “why Roblox” answer with no tie to a specific product, mission or team.
- •No coherent story for short or frequent tenures — cited explicitly in hiring-committee rejections.
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