Roblox is extremely thorough in their interview process. It is the only company where I've experienced a more challenging set of interviews, compared to Ning.

Structurally, the interviews were most similar to Amazon, but with a greater range of hands-on coding, architecture, and design exercises. There was no evidence of a "bar raiser," however.

The use of an IDE for the coding exercises was a welcome change from the usual Silicon Valley "whiteboard" format. It felt like a much clearer proxy for real-world performance.

One of the C++ coding exercises particularly stood out. The IDE/compilation loop allowed me to submit a complete solution within a very limited time frame, and the interviewer was understanding of the limited trial-and-error required.

To anyone considering an engineering position at Roblox: this team is looking for "navy seals," so prepare appropriately.

I'd recommend reading "Hello, Startup: A Programmer's Guide to Building Products, Technologies, and Teams," especially if you're not already on a world-class team. Practice intermediate(+) coding exercises in an IDE (Hackerrank or something similar) so you're well prepared (as fluent as possible in the target language) for the coding questions.

Why do you want to work at Roblox?