Went through the Roblox frontend engineer interview loop in spring 2026 and wanted to document what it actually looked like because I couldn't find much specific to frontend when I was prepping.
Background: 4 years frontend, React + TypeScript, some design system work.
The loop was 4 rounds:
Coding round 1 (LC-style): Two questions, both medium. One was a string manipulation problem, one was a tree traversal. Honestly pretty standard, nothing frontend-specific here. They use standard coding platforms (CoderPad-ish). Just grind mediums like any other loop.
Coding round 2 (frontend-specific): This is where it got interesting. I had to build a small React component from scratch. The prompt: a paginated list component that fetches data from a mock API endpoint they gave me. Had to handle loading state, error state, and keyboard navigation for accessibility. I was expected to write actual working JSX and handle hooks correctly. No framework help beyond vanilla React.
This round also had a follow-up: 'how would you test this?' They wanted me to talk through what I'd assert in unit tests and what I'd punt to E2E.
System design: For frontend, this was a UI architecture round. I was asked to design a real-time notification system for the Roblox web platform. Think: how do you decide between polling vs WebSockets vs SSE? How do you manage notification state in the client? How does this scale when a user has 10,000 unread items? It's not a backend system design, but you need to think about data flow, caching on the client, and user experience tradeoffs.
Behavioral: Heavy on collaboration and 'how do you work with designers' questions. Roblox is UGC-platform, they build tools for creators who aren't engineers, so accessibility and DX come up a lot.
Perf came up too. One interviewer asked me to walk through how I'd debug a slow render in a React component. Make sure you know the profiler, why re-renders happen, and what memoization actually costs.
I got to offer. Base was $175k, senior level (4 YOE mapped to their L4 roughly). RSUs were the bigger chunk. Total comp first year came out around $240k with the cliff tranche.
Roblox felt like a team that genuinely cares about frontend quality, not just treating it as 'make the buttons work.' That was refreshing.