Senior C/C++ SDK Performance Engineer

TikTok; San Jose (CA); On-site; USD 212,800 - 387,600; Full time

Job summary

TikTok is seeking a Senior Software Engineer specializing in C/C++ to optimize the Effect SDK performance on mobile devices. You will diagnose frame drops, power usage, and bottlenecks across the camera pipeline, render engine, and on-device inference, delivering high-efficiency code across iOS and Android.

Join a team responsible for the video effects powering hundreds of millions of creators, shaping low-latency experiences and energy-efficient processing on a wide range of devices.

Qualifications

• BS or MS in Computer Science with 4+ years of relevant experience.
• Proficient in C/C++; strong mobile performance interest.
• Familiar with iOS/Android development and mobile video/image processing.

Responsibilities

• Drive end-to-end optimization of the effect pipeline during shooting, diagnosing frame drops and power use on devices.
• Profile the camera→effect→render→encode pipeline; identify bottlenecks in CPU/GPU/memory/threads.
• Collaborate with rendering and on-device teams to optimize model integration and execution.
• Build and evolve the Effect SDK (Native, cross-platform for iOS & Android) into robust modules.
• Localize and fix production issues with ownership mindset.
• Learn quickly, communicate clearly, and collaborate across teams.

Skills

C/C++ proficiency

Mobile performance

iOS/Android development

Video/image processing

Profiling/debugging

Education

B.S./M.S. in CS

Tools

Xcode Instruments

Perfetto / Systrace

Android GPU Inspector

RenderDoc

Job description

TikTok is seeking a Senior Software Engineer specializing in C/C++ to optimize the Effect SDK performance on mobile devices. You will diagnose frame drops, power usage, and bottlenecks across the camera pipeline, render engine, and on-device inference, delivering high-efficiency code across iOS and Android.

Join a team responsible for the video effects powering hundreds of millions of creators, shaping low-latency experiences and energy-efficient processing on a wide range of devices.