Senior Software Engineer, Telephony

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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

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