Senior SDK Engineer

LiveKit is revolutionizing the AI landscape by providing the essential network infrastructure that powers multimodal AI interfaces, enabling seamless audio and visual interactions. Founded in 2021, LiveKit has rapidly grown to support over 3 Billion calls annually, 100,000+ developers globally, and industry giants like OpenAI, Character AI, Spotify, and Meta.

You'll thrive at LiveKit if you:

• obsess with crafting code that is fast, reliable and practical for the problem

• are known as the go-to person for tackling tough technical problems

• work hard and can build and ship fast

• can clearly explain complex technical concepts to others

• are a fast learner, frequently picking up new languages and tools

The best way to impress us is with thoughtful Issues and/or PRs on our Github repos 😊

About This Role:

We’re looking for a Senior SDK Engineer who thrives on variety and loves moving between layers of the stack. At LiveKit, you’ll help power real-time communications across platforms by contributing to the Unity SDK, C# bindings, Python modules, and developer tooling that enable teams around the world to build high-quality, low-latency apps.

This role is ideal for someone who enjoys deep technical work: whether it’s refining Unity integrations, debugging C# interop, improving Python APIs, benchmarking performance in distributed environments, improving CI pipelines, or refining SDK ergonomics. You’ll work with a small, world-class engineering team that values autonomy, collaboration, and craftsmanship.

What makes this role unique is its breadth, ownership, and impact — you’ll become the owner or DRI of the Unity SDK and supporting C#/Python components, guiding their design, implementation, and long-term direction. At the same time, you'll help unify the developer experience across all SDKs, ensuring performance, reliability, and consistency throughout the LiveKit ecosystem.

What You'll Do:

1. Own the Unity SDK and C# bindings, becoming the go-to engineer responsible for design, development, and long-term maintenance.

2. Contribute to Python tooling and shared modules that power LiveKit’s multi-language SDK ecosystem.

3. Collaborate closely with cross-functional teams to ensure smooth integration, shared standards, and consistent developer experience.

4. Diagnose and solve complex cross-platform performance or reliability issues across Unity, desktop, and server environments.

5. Improve CI/CD, testing, and release processes across SDKs, strengthening release pipelines and developer tooling.

6. Push the boundaries of real-time performance, optimizing systems for low latency, scalability, and efficiency.

Who You Are:

• You have strong engineering fundamentals and experience shipping production-quality code in C# and Unity.

• You’re comfortable moving between languages and toolchains, picking up new technologies quickly as the problem demands.

• You’ve built or maintained SDKs, APIs, or developer-facing frameworks with an eye for usability and long-term maintainability.

• You have hands-on experience with CI/CD, testing, and release processes in multi-language environments.

• You’re collaborative, pragmatic, and communicative, able to work closely with other engineers to solve tough cross-platform challenges.

• (Bonus) You understand real-time systems, multimedia pipelines, or network performance.

• (Bonus) You’ve worked on cross-platform SDK design or bridging native modules.

We offer

• The opportunity to shape the brand of a fast-growing developer platform

• Collaboration with a small, senior team that deeply values craft and creativity

• Competitive salary and equity package

• Health, dental, and vision benefits

• Flexible vacation policy