I was not at all impressed. I solved an IQ problem that was fairly simple and then had to build Cork from GitHub. It took a day of sorting out build problems before I got it to build.
I then found an alternative called CloudCompare with an installer. Then came the "coding test," which seems designed to find reasons to reject PhDs with twenty years of software/hardware experience. I cannot imagine NASA giving Stephen Hawking a "coding test" to prove he can write FORTRAN or C++.
I was given two hours to solve two problems on Testdome. I solved them and tried to submit the solution, only to receive an error message that I was "not allowed" to include a C++ "main" function containing my tests. I emailed the code to Roblox (which compiled, ran, and gave correct results in Visual Studio) and then sent a follow-up email with an optimized version (under the assumption that they value people who take the trouble to improve on what they can achieve with someone standing over them with a bullwhip and a stopwatch).
Shortly thereafter came the standard "no-reply@xyz.com" email to announce I was "not suited," which I now take to mean "We are a sweatshop, not NASA, go away," since I seem to get it whenever I am interviewed by known sweatshops such as Amazon. It is a shame, since the high-level discussion was more interesting than the "Prove you'd make a good hacker" part of the interview process. I love discussing how you can apply physics to problems in Computer Science, because I would rather join a company that hires PhDs to solve problems hackers can't. Having worked for hackers who ruin your skills, I don't want to work for more hackers.
The only thing I can say in fairness is that I took quite a while to get around to the coding test. This was down to the fact that I have some lousy flatmates who were keeping me awake at night, and I do not really like "coding tests," especially when I am too tired to think properly. This said, either they want PhDs or they want coding-grunts who love sitting coding tests because they hate jobs that involve mathematics.
A problem involving strings that I am not prepared to divulge.
The following metrics were computed from 1 interview experience for the Roblox Principal Engineer role in United Kingdom.
Roblox's interview process for their Principal Engineer roles in the United Kingdom is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Roblox's Principal Engineer interview process in United Kingdom.