Roblox sends a HackerRank assessment. If you do well on the assessment, they proceed to a single, two-part interview with two different technical assessments conducted by two different engineers.

Determine unique users given a list of IP addresses and user pairs. A unique user is defined as a user whose name is not a prefix of another user's name at the same IP address.

Determine if a path is navigable given a 2D array of 1's and 0's, where 1's are walkable and 0's are not. The start is defined as the top left, and the end is defined as the bottom right. The user may walk up, right, left, or down to walkable spaces, or jump over one unwalkable space and land on a walkable space.