Principal Software Engineer - Frontend Architecture

What You’ll Do:

In this Frontend Architect role, you will be a key contributor in shaping the future of Roblox’s application surfaces. You will develop the architecture and technical direction of our frontend stack for consumer-facing surfaces, working across teams and technology platforms to ensure our solutions are universal and scalable​. This role would require defining how all our frontend pieces fit together, how data flows through the client, and how we can build features faster and more reliably. You will have the opportunity to work with modern frameworks and also dive into our custom Luau-based tech, bridging the best ideas from the web ecosystem into Roblox’s unique environment. If you are excited by the idea of creating the foundation on which dozens of engineers will build new features – and doing it in a way that delights our end-users with speed and stability – then this role will be perfect for you.

Join us and help build the frontend platform that underpins the metaverse! Together, we’ll enable incredible new experiences for our users and a productive, joyful development experience for our engineers.

You Have:

• Bachelor’s degree in Computer Science or a related field, or equivalent practical experience​.
• 8+ years of software development experience, including substantial experience building user-facing frontend applications. Proven track record in implementing or architecting complex frontend systems for large-scale applications​ (experience with large-scale or high-traffic applications is a plus​).
• Deep expertise in modern mobile/web/frontend technologies – including proficiency in HTML5, CSS3, and JavaScript/TypeScript or mobile equivalents – and hands-on experience with frameworks such as React​. Comfortable with component-based architecture and state management patterns (Redux/Flux or similar) for building maintainable UIs.
• Strong programming skills in one or more scripting languages relevant to frontend and tooling such as TypeScript, Swift or Kotlin, or the ability to quickly learn them​, is highly desirable. Familiarity with C++ or other low-level languages is beneficial for understanding our engine integration.
• Solid understanding of software design principles and architectural patterns as they apply to frontend development. Able to design clean APIs and module boundaries, and experienced in creating maintainable and testable code bases with proper unit/integration testing practices​.
• Demonstrated ability to optimize frontend performance and diagnose issues. Knowledge of performance debugging, profiling, and benchmarking techniques on the client side​. Passion for ensuring fast, fluid user experiences on all devices.
• Excellent communication skills and a team-oriented mindset. Ability to work effectively with cross-functional teams, gather requirements, and drive consensus on technical solutions. Comfortable sharing ideas, documenting designs, and collaboratively solving problems in a large engineering organization.
• Experience developing applications or libraries across multiple platforms (web, mobile, desktop). Familiarity with building applications that serve users on Web, iOS, Android, Windows, etc. is desirable for ensuring a seamless cross-platform experience​.

You will:

• Design and implement robust, extensible systems powering Roblox’s core surfaces (Home, Avatar, Search, etc.) to serve millions of users efficiently.
• Create reusable frontend abstractions using React paradigms and modern tech to enable fast, consistent UI development across teams and devices.
• Maintain and evolve Roblox’s internal React-inspired Luau UI libraries, promoting modular design, state management patterns, and performance.
• Define architecture standards to ensure frontend code is scalable, testable, and aligned with proven patterns like Flux, MVC, and MVVM.
• Partner with engineering, product, and design teams to integrate shared solutions and deliver cohesive, high-quality user experiences.
• Address cross-surface issues like memory, responsiveness, and load times to ensure a reliable, fast UI at scale.
• Provide architectural leadership, review designs/code, and mentor engineers in best practices and effective use of platform tools.