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We are a global leader in cell-free DNA (cfDNA) testing, dedicated to oncology, women’s health, and organ health.
Senior Software Engineer, Voice AI
Location
California
Posted
20 days ago
Salary
0
Seniority
Senior
Job Description
Senior Software Engineer, Voice AI
Natera
• Own the end-to-end voice AI architecture — from Twilio media streams through LLM orchestration to TTS output and call disposition. • Design and implement multi-agent systems using tool calling, agent handoffs, and shared conversation state for complex patient workflows. • Build and optimize real-time audio pipelines — WebSocket streaming, codec handling (mulaw/PCM), VAD configuration, and interruption management. • Architect analytics and observability infrastructure for voice-specific metrics: per-segment latency (STT/LLM/TTS), call efficacy, disposition accuracy, and ASR error rates. • Solve voice-specific challenges: turn-taking timing, silence detection thresholds, barge-in recovery, medical term recognition, and end-to-end latency optimization. • Integrate voice agents with internal services via secure authenticated APIs. • Drive platform reliability — eliminate single points of failure, implement multi-provider LLM failover, and design graceful degradation paths. • Collaborate with product and clinical operations to improve self-serve efficacy rates and reduce call escalations. • Mentor team members on voice AI best practices and contribute to architectural decisions.
Job Requirements
- 5+ years of software engineering experience, with at least 2 years building production voice AI or conversational AI systems.
- Deep experience with voice AI pipelines — understanding the end-to-end flow from telephony through STT, LLM processing, TTS, and back to the caller.
- Production experience with agentic architectures — multi-agent orchestration, tool calling, agent handoffs, memory/state management.
- Strong understanding of voice-specific challenges: VAD tuning, turn-taking, interruption/barge-in handling, latency budgets, audio codec management.
- Hands-on experience with telephony systems — Twilio (media streams, SIP, IVR), or equivalent platforms with WebSocket-based audio streaming.
- Proficiency in TypeScript/Node.js with strong async programming patterns; experience with NestJS or similar frameworks.
- Experience with STT/TTS providers (Deepgram, OpenAI, ElevenLabs, Azure Speech).
- Production experience with LLM APIs — OpenAI (especially Realtime API), Anthropic Claude, or equivalent; prompt engineering for conversational agents.
- High agency and autonomy — you don't wait for permission or detailed specs.
- Excellent communication skills to translate complex voice AI architecture decisions.
Benefits
- Comprehensive medical, dental, vision, life and disability plans for eligible employees and their dependents.
- Free testing for employees and their immediate families.
- Fertility care benefits.
- Pregnancy and baby bonding leave.
- 401k benefits.
- Commuter benefits.
- Employee referral program.
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