Senior Software Engineer, Telephony

LiveKit is building the infrastructure layer for the voice-driven era of computing. Our platform gives developers everything they need to build, test, deploy, scale, and observe agents in production. Founded in 2021, LiveKit powers voice AI applications for OpenAI, xAI, Salesforce, Coursera, Spotify, and thousands of others, collectively facilitating billions of calls each year.

Youll 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:
Voice has connected people for over a century — and it’s entering a new era. As a Telephony Engineer, you’ll help reimagine how calls, media, and intelligence flow through modern networks. From SIP and RTP to AI-driven voice experiences, your work will directly impact how businesses and customers communicate across industries worth billions.

What You’ll Do:

Design, build, and operate telephony services that manage phone numbers, carrier integrations, and SIP trunks at scale

Develop reliable signaling and media systems that bridge traditional telephony with WebRTC and AI pipelines

Work closely with carriers and global vendors to expand number coverage, improve routing, and ensure regulatory compliance

Collaborate with the SFU, Developer Success, Infrastructure and SDK teams to make voice features easily accessible to developers

Monitor and optimize voice quality, latency, and reliability using observability and debugging tools

Contribute to the evolution of modern, developer-friendly APIs for telephony and media control

Who You Are:

You’re a strong senior software engineer who thrives in complex, distributed systems — ideally with experience in Go, C, or C++

You have a deep understanding of APIs, backend architecture, and large-scale real-time systems

You think beyond code — you understand how infrastructure choices shape products, developer experience, and end-user impact

You’ve ideally worked on a developer platform or communications product and appreciate the nuances of reliability, latency, and usability

You’re hands‑on, curious, and comfortable diving into protocols, packet captures, or production issues when needed

You collaborate well across teams, communicate clearly, and value simplicity in design and execution

You care about building the foundation for how people — and AI — will communicate in the next decade

Our Commitment to You

An opportunity to build something truly impactful to the world

Contribute to open source alongside world‑class engineers

Competitive salary and equity package

Health, dental, and vision benefits

Flexible vacation policy

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