Several rounds of technical and behavioral interviews with engineering staff and senior managers.

Technical interviews include:

• Coding (not too difficult, but not trivial either)
• System design (Roblox drills deep in this area)

Behavioral questions are not tricky, but work on your stories in the STAR framework.

There is also a discussion of an open-ended and vague problem that probes a candidate's ability to generate ideas in an unfamiliar field.

Find the number of overlapping substrings in a text.

This is a problem that has many variations with strings and number sequences. Some are published on LeetCode, and some can be found on YouTube.