Lead Engineer

About the role

We're looking for a Lead Engineer to own the real-time voice and telephony platform that powers live AI conversations at Blue Machines. You'll set the technical direction for everything from the carrier and SIP trunk to the AI agent: signalling, media, streaming ASR/TTS and the latency budget across all of them.

What you'll do

• Own the end-to-end architecture of the voice and telephony stack, covering SIP signalling, media servers, WebRTC and call routing from the carrier to the AI agent
• Design and run real-time media pipelines (FreeSWITCH, Asterisk, Kamailio or LiveKit) that stream audio to ASR, LLM and TTS within tight end-to-end latency budgets
• Lead carrier and telephony-provider integrations: SIP trunks, DIDs, number provisioning and multi-provider failover
• Drive call quality and reliability across codecs, jitter, packet loss, echo and barge-in. Define and own SLOs for latency, uptime and call success rate
• Scale the platform for high call concurrency through capacity planning, autoscaling of media workloads on Kubernetes and cost per call minute

What you need

• 7–10 yrs of experience
• System design
• Python
• Java
• Kubernetes
• Docker
• LLMs
• Any graduate

Good to have

• Machine learning
• Incident response
• Datadog