ApplySarthiPrincipal Software Engineer, App Performance
Roblox
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This role on the market
701 open performance roles across 187 companies are on ApplySarthi right now, most of them in Bengaluru (44), Hyderabad (23), Pune (10).
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What performance roles keep asking for: Python (18%), C++ (16%), Stakeholder management (15%), SQL (13%) — counted across their open postings here.
Software Engineer jobs in the United States · Remote Software Engineer jobs · C++ jobs · CI/CD jobs
Roblox has 256 open roles listed here.
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Counted across 14 company job boards, updated as roles open and close.
Preparing for this interview
Interviews for performance roles keep coming back to Python, C++, Stakeholder management, SQL. 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.
- 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?
- How would you design an API for a feature you have worked on?
Prep Sarthi gives you a free mock interview: an AI interviewer asks you questions like these out loud, from your own CV and this job, and shows your score and your weakest answer.
Practise the Principal Software Engineer, App Performance 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.
The Consumer App Performance team is looking for a Principal Software Engineer to spearhead stability and performance improvements. You will work across system-level, cross-platform C++ game engine, and front-end codebase, partnering with teams across the company to identify bad behavior patterns and performance bottlenecks, ship measurable improvements, and prevent regressions over time.
Our team owns the end-to-end performance of Roblox, from speed and responsiveness to efficiency and stability, across all devices and platforms we support: mobile, desktop, and console.
You will:
- Drive research of new opportunities, build and execute roadmaps to improve stability and resilience of Roblox across all target platforms
- Design novel solutions to prevent and mitigate crashes, hangs, and other interruptions that hurt user experience.
- Build robust defense mechanisms for early detection of stability anomalies through real-time monitoring, alerting, and CI/CD automation.
- Work with stakeholders across Engineering, Product, and Design to align on priorities, tradeoffs, and rollout plans; ensure performance improvements support the user experience.
- Deliver improvements and guardrails that scale across mobile, desktop, and console, with informed tradeoffs for mobile constraints.
You have:
- 10+ years of experience: working with complex client application codebases, proficiency in C++, knowledge of Lua or other scripting languages is a plus.
- Comfort with ambiguity: able to dive into unfamiliar codebases, unblock yourself, and take projects from greenfield/MVP → production-grade.
- Deep understanding of client platforms: hands-on experience in performance profiling and triaging issues on one or more of mobile or desktop platforms, deep understanding of platform API and best practices to implement performance and robust code.
- Systems thinking: ability to build systems that work and keep on working reliably (measurement, monitoring, regression prevention).
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 2026-10-05. ApplySarthi collects openings and links to application pages; the role is advertised by Roblox, not by us.