Judi Health is looking for a Senior Telephony Infrastructure Engineer to join our mission to bring cutting-edge voice AI into healthcare. You will build the foundational voice platform that powers our AI-driven products, owning the infrastructure layer from carrier connectivity through to the handoff where our voice AI agents take over.
What You'll Do
- Design, build, and operate greenfield SIP trunking infrastructure connecting carrier-grade telephony to our internal voice AI platform.
- Architect and implement real-time bidirectional audio streaming pipelines to support our ECS-based voice stack.
- Design autoscaling strategies for stateful, connection-based workloads, enabling the platform to scale dynamically based on connection ingress and concurrent call volume.
- Implement call routing, inbound/outbound dialing flows, and media transport (RTP/SRTP).
- Integrate with Amazon Connect to bridge carrier connectivity into our custom infrastructure.
- Collaborate with ML engineers, product managers, and other stakeholders to ensure the telephony layer meets the needs of our voice AI systems.
- Ensure outbound dialing infrastructure complies with TCPA regulations and supports STIR/SHAKEN attestation.
What We're Looking For
- Minimum 6+ years of experience in software engineering with a strong focus on real-time communication infrastructure, telephony systems, or voice platforms.
- Deep hands-on experience with SIP protocol, including trunking, signaling flows, SDP negotiation, and RTP/SRTP media transport.
- Experience standing up and managing SIP trunks with cloud or carrier providers (Twilio, Bandwidth, Vonage, Telnyx, or similar).
- Experience building real-time bidirectional audio streaming infrastructure.
- Proficiency with AWS infrastructure, including ECS (Fargate or EC2-backed), ALB/NLB, Kinesis, Lambda, and CloudWatch.
- Experience designing autoscaling strategies for stateful connection-based workloads (session scaling, concurrent call capacity planning).
- Experience with outbound dialing infrastructure, including familiarity with TCPA compliance and STIR/SHAKEN attestation.
- Strong proficiency in Python. Familiarity with C for working with open source telephony projects (FreeSWITCH, Kamailio, PJSIP, etc.) and Rust is a plus.
Nice to Have
- Experience with Amazon Connect, including Contact Flows, APIs, Kinesis Video Streams integration, and Lambda hooks.
- Experience bridging carrier-grade telephony into custom media pipelines.
- Familiarity with WebRTC (STUN/TURN/ICE) and browser-based softphone implementations.
- Experience building multi-tenant programmable voice platforms or internal telephony PaaS.
- Familiarity with voice-specific audio preprocessing, including VAD, echo cancellation, AGC, and noise suppression.
- Exposure to ASR/TTS integration in real-time call flows (streaming partial results, endpointing, barge-in).
- Interest in ML/AI and conversational AI systems.
Technical Stack
- SIP, RTP/SRTP
- AWS ECS, AWS ALB/NLB, AWS Kinesis, AWS Lambda, AWS CloudWatch, Amazon Connect
- Python, C, Rust
- FreeSWITCH, Kamailio, PJSIP, WebRTC, STUN/TURN/ICE
Benefits & Compensation
- Compensation range: $180,000-$210,000 USD
Judi Health values a diverse workplace and celebrates the diversity that each employee brings to the table. We are proud to provide equal employment opportunities to all employees and applicants for employment and prohibit discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, medical condition, genetic information, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.
