Your role

As a Sr. Software Engineer on the Tel Core team, you are the steward of our media engine’s evolution. You will bridge the gap between high‑level product goals and technical execution, ensuring our telephony stack remains resilient as we scale. You’ll mentor peers and shape the long‑term roadmap while fostering a culture of engineering excellence. Your success is defined by the seamless, high‑quality audio experience of millions of users. What you’ll do

Maintain and modernize the real‑time services that run on the Telephony Engines. Architect backend libraries and APIs to integrate with the broader Telephony Platform. Build and optimize low‑latency media pipelines for voice and video—tuning codecs, RTP flows, and congestion‑control behavior to deliver consistently clear conversations over unreliable networks. Investigate and resolve complex production issues across PSTN, WebRTC, and carrier boundaries using Telephony Engine logs, PCAPs, observability tools, a...