Principal Software Engineer, Real-Time WebRTC

Speedrun Talent Network; San Mateo (CA); On-site; USD 295,000 - 345,000; Full time

Job summary

Roblox is seeking a Principal Software Engineer for the Audio-Video-Communication team in San Mateo, CA. You will build and launch the next-generation real-time communications platform to support billions of users, focusing on high-performance C++ and scalable architectures.

You will collaborate across engine teams to deliver cross-device voice chat, 3D audio, and large-scale broadcast features, while optimizing performance and reliability for constrained devices and consoles.

Qualifications

• 8+ years of experience in user-facing software development.
• Experience deploying a high-quality, multi-service distributed system at scale.
• Familiarity with challenges of scaling on consoles or mobile devices.
• Proficiency in C++ and understanding of parallel/concurrent programming concepts.
• Knowledge of industry best practices, design patterns, and problem-solving from multiple perspectives.

Responsibilities

• Build and launch the latest real-time communication platform from the ground up for billions of users.
• Write efficient, maintainable, and scalable code.
• Introduce high-quality communication features across devices ranging from mobile to high-end platforms.
• Improve robustness and performance of existing components.
• Collaborate with engine and partner teams to craft synergistic solutions.

Skills

C++

Parallel programming

Distributed systems

Performance optimization

Kernel programming

Memory management

Job description

Roblox is seeking a Principal Software Engineer for the Audio-Video-Communication team in San Mateo, CA. You will build and launch the next-generation real-time communications platform to support billions of users, focusing on high-performance C++ and scalable architectures.

You will collaborate across engine teams to deliver cross-device voice chat, 3D audio, and large-scale broadcast features, while optimizing performance and reliability for constrained devices and consoles.