I was contacted and submitted my resume through a recruiter.

The process involved two phone screens, one with HR and one with the engineering director, followed by an online assessment and then a five-round onsite interview.

I received the oral result the next day and the official offer two days later.

It was a very smooth and pleasant process, the best interview experience I have had.

Algorithm questions evaluate how you approach problems and your thinking pattern. The important part is to share and demonstrate how you think and solve these problems. Communication is VERY important.

Given that Roblox is a game company, experience or knowledge in how to make games (computer graphics, physics engine implementation, etc.) will definitely add to your score.