Senior Software Engineer, Telephony

About the Role

Voice has connected people for over a century, and it’s entering a new era. As a Telephony Engineer, you will help reimagine how calls, media, and intelligence flow through modern networks, directly impacting how businesses and customers communicate.

Responsibilities

• 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 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

Requirements

• Strong senior software engineering experience thriving in complex, distributed systems
• Deep understanding of APIs, backend architecture, and large-scale real-time systems
• Ability to think beyond code, understanding how infrastructure choices shape products, developer experience, and end-user impact
• Hands-on, curious, and comfortable diving into protocols, packet captures, or production issues when needed
• Excellent collaboration and clear communication skills, valuing simplicity in design and execution
• Passion for building the foundation for how people and AI will communicate in the next decade

Nice-to-Haves

• Experience with Go, C, or C++
• Prior work on a developer platform or communications product