ApplySarthiPrincipal Software Engineer
Roblox
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Preparing for this interview
Interviews for software roles keep coming back to AWS, Python, Java, System design. Practise those questions before you sit with Roblox.
Questions you are likely to be asked
- Why do you want to join Roblox?
- What is your experience with C++? Tell me one thing you learned the hard way.
- Tell me about a hard bug you tracked down. How did you find the cause?
- How do you decide what to test, and what does good code review look like to you?
- Describe a time a deadline forced a trade-off in quality. What did you choose and why?
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Practise the Principal Software Engineer at Roblox interview free →Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators.
At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there.
A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone.
As a Principal Software Engineer of the Game Engine data model team, you will innovate on the core data structures that form the backbone of Roblox’s platform. In this role you will have first hand opportunity to design and build one of the core technologies that makes the Roblox game engine special.
The Data Model framework provides an interface between engine capabilities and our creators. It also acts as a fabric to core technologies, such as networking, scripting, Studio, rendering and physics which are essential to the high performance of the Roblox game engine. This role is in our San Mateo, CA HQ three days a week (Tuesdays to Thursdays).
You Will:
- Develop engine code that performs well for all user-created games on the Roblox platform.
- Establish the foundational architecture and technical direction for the team.
- Work cross-functionally, across teams and technology platforms to deliver high quality and amazing functionality.
- Lead by example and mentor engineers to implement technological best practices, patterns, and strategies.
- Improve the product quality by encouraging automation testing.
- Take Ownership of projects throughout their full lifecycles.
- Execute on all the devices Roblox supports - from desktop clients to mobile phone clients to console clients.
You Have:
- At least 8+ years experience and expertise with C++ code-generation and analysis tools (libclang, Abstract Syntax Trees, etc).
- Outstanding systems-level C++ programming skills.
- Curiosity about the actual work the CPU does when you use smart pointers, templates, virtual functions, and blocks of memory, both structured and raw.
- BS or MS in Computer Science, or equivalent practical experience.
Additional Considerations:
- Familiarity with game engines or other large-scale simulations is beneficial.
- Excellent interpersonal skills and follow-through.
- Ability to build systems that work and keep on working optimally.
- Detailed in handling potential failure cases, and diligent in automated testing.
- Willingness to learn, and stay up-to-date on technology developments.
For roles that are based at our headquarters in San Mateo, CA: The starting base pay for this position is as shown below. The actual base pay is dependent upon a variety of job-related factors such as professional background, training, work experience, location, business needs and market demand. Therefore, in some circumstances, the actual salary could fall outside of this expected range. This pay range is subject to change and may be modified in the future. All full-time employees are also eligible for equity compensation and for benefits as described on this page.
Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).
Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. Roblox also provides reasonable accommodations to candidates with qualifying disabilities or religious beliefs during the recruiting process.
For US based roles only, please note the Company may not be able to employ candidates for this role who have United States work authorization related to certain U.S. visa categories, or support future H-1B sponsorship at this time.
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Listed on greenhouse · posted 2026-04-01. ApplySarthi collects openings and links to application pages; the role is advertised by Roblox, not by us.