Principal Software Engineer Interview Experience - San Mateo, California
January 27, 2026
Positive ExperienceGot Offer
Process
I applied through a recruiter. The process took 2 days.
Phone screen with system design, ask how to match players during game play. A system design interview, focus more on how to properly matching, and infra cost etc. The interview took about 1h in total.
Questions
Phone screen with system design, asking how to match players during gameplay.
A system design interview, focusing more on proper matching, infrastructure cost, etc.
The interview took about 1 hour in total.
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Interview Statistics
The following metrics were computed from 5 interview experiences for the Roblox Principal Software Engineer role in San Mateo, California.
Success Rate
80%
Pass Rate
Roblox's interview process for their Principal Software Engineer roles in San Mateo, California is incredibly easy as the vast majority of engineers get an offer after going through it.
Experience Rating
Positive80%
Neutral0%
Negative20%
Candidates reported having very good feelings for Roblox's Principal Software Engineer interview process in San Mateo, California.
Roblox Work Experiences
5.0
A really nice place to work
Principal Software Engineer • Current Employee
San Mateo, California, United States
February 24, 2021
Pros: - exceptional growth opportunity. Better that joining Facebook before it went public.
- very interesting engineering problems to solve. It doesn’t feel like you’ll be fixing some small button on a web site.
- better overall compensation package than at Google/Facebook/Apple.
- feels like we are just starting to grow world wide.
Cons: People coming from other companies often get higher rankings than some long-timers at the company, even though they are clearly not at the same level. It seems like long-timers will be moving on because of that.
5.0
Exciting growth: Be a hero to kids
Principal Software Engineer • Current Employee
San Mateo, California, United States
March 17, 2018
Pros: Be a hero to kids everywhere.
Own a product and make a difference. Basically, every team has more problems than people. So, whatever you build will eventually become a world-class version of that "thing." And you get to make it happen.
Core values that are actually valued. They're on the company-issued mugs. People actually talk about them in meetings, in interviews, in performance reviews, and when making important decisions.
Cons: As a new employee, you can end up "swimming in the deep end" for a while. Roblox is an incredibly complex product with over 10 years of legacy decisions and systems. It's a lot to absorb.
2.0
No growth, no respect
Principal Software Engineer • Former Employee
San Mateo, California, United States
June 21, 2024
Pros: Pay and benefits are competitive. There are some good people there. The company still has some safe islands where people respect each other.
Cons: The company is almost a perfect opposite of “extreme ownership”. Leadership is immature for the challenges it’s facing and it’s not strong enough to admit it and learn.
This ends in deep insecurities, politics, and BS at almost all the levels of the company. Blame is passed left and right.
To hide incompetence, leadership plays out their rank and forces decisions down the chain, rarely explaining their why and not giving any chances for people who are executing the command to provide any input to the plan.
- 5.0A really nice place to workPrincipal Software Engineer • Current EmployeeSan Mateo, California, United StatesFebruary 24, 2021Pros: - exceptional growth opportunity. Better that joining Facebook before it went public. - very interesting engineering problems to solve. It doesn’t feel like you’ll be fixing some small button on a web site. - better overall compensation package than at Google/Facebook/Apple. - feels like we are just starting to grow world wide.Cons: People coming from other companies often get higher rankings than some long-timers at the company, even though they are clearly not at the same level. It seems like long-timers will be moving on because of that.
- 5.0Exciting growth: Be a hero to kidsPrincipal Software Engineer • Current EmployeeSan Mateo, California, United StatesMarch 17, 2018Pros: Be a hero to kids everywhere. Own a product and make a difference. Basically, every team has more problems than people. So, whatever you build will eventually become a world-class version of that "thing." And you get to make it happen. Core values that are actually valued. They're on the company-issued mugs. People actually talk about them in meetings, in interviews, in performance reviews, and when making important decisions.Cons: As a new employee, you can end up "swimming in the deep end" for a while. Roblox is an incredibly complex product with over 10 years of legacy decisions and systems. It's a lot to absorb.
- 2.0No growth, no respectPrincipal Software Engineer • Former EmployeeSan Mateo, California, United StatesJune 21, 2024Pros: Pay and benefits are competitive. There are some good people there. The company still has some safe islands where people respect each other.Cons: The company is almost a perfect opposite of “extreme ownership”. Leadership is immature for the challenges it’s facing and it’s not strong enough to admit it and learn. This ends in deep insecurities, politics, and BS at almost all the levels of the company. Blame is passed left and right. To hide incompetence, leadership plays out their rank and forces decisions down the chain, rarely explaining their why and not giving any chances for people who are executing the command to provide any input to the plan.
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