Senior C++/Rust Systems Engineer for CTV Runtime

Tubi; San Francisco (CA); Hybrid; USD 186,000 - 266,000; Full time

Benefits offered by this job

Medical/dental/vision

401(k)

Paid time off

Job summary

Tubi in San Francisco is hiring for a hands-on, high-ownership role to drive the development of Cobalt as the runtime for our CTV apps, starting with Fire TV and expanding to other platforms.

This hybrid role requires two days in the SF office and involves close collaboration with web engineers, QA, and device partners to ensure fast launches, low memory usage, and consistent behavior across devices.

Qualifications

• 6+ years of professional software engineering in systems or native code.
• Expert-level modern C++ (C++17/20) with memory management and concurrency.
• Strong Rust experience with ownership and lifetimes, async, and C/C++ interop (FFI).

Responsibilities

• Build, integrate, and ship Cobalt as the runtime for Tubi's CTV apps.
• Implement Starboard platform integrations: graphics, input, audio/video playback, DRM, services.
• Write native modules in C++/Rust with safe FFI boundaries.
• Profile and optimize startup and memory on low-end devices (1 GB RAM).
• Keep Cobalt up to date; patch security issues; upstream fixes when possible.
• Collaborate with media teams on video pipelines and ad playback.
• Build tooling to run Tubi on Cobalt in CI and on dev machines.
• Partner with device engineering teams and mentor engineers.

Skills

C++17/20

Rust

FFI (C/C++)

Build systems

Performance profiling

Android NDK

Leadership

Tools

Perfetto

heaptrack

GN/Ninja

CMake

Job description

Tubi in San Francisco is hiring for a hands-on, high-ownership role to drive the development of Cobalt as the runtime for our CTV apps, starting with Fire TV and expanding to other platforms.

This hybrid role requires two days in the SF office and involves close collaboration with web engineers, QA, and device partners to ensure fast launches, low memory usage, and consistent behavior across devices.