Principal Software Engineer, App Performance

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.

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 .

Annual Salary Range

$295,250 — $345,040 USD

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.