Software Engineer III, Voice AI

Natera

Software Engineer III developing and maintaining Voice AI platform handling thousands of patient calls at Natera. Focus on real-time conversational AI systems for improved patient access.

Posted 5/26/2026full-timeRemote • California • 🇺🇸 United StatesMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

ApacheAWSAzureDistributed SystemsDynamoDBJavaScriptKafkaMySQLNode.jsNoSQLRedisSDLCTypeScript

About the role

Key responsibilities & impact

Take ownership of assigned voice AI features and components, guiding them through the full software development lifecycle.
Contribute to design discussions, code reviews, and best practice adoption within the Voice AI team.
Drive technical decisions on voice pipeline optimization — VAD tuning, turn-taking, interruption handling, and latency management.
Plan and prioritize tasks in an Agile environment, ensuring timely and high-quality delivery.
Work with Product Managers and stakeholders to refine requirements and scope technical efforts for conversational AI features.
Monitor voice platform health metrics (call efficacy, ASR accuracy, per-segment latency) and prioritize improvements based on data.
Mentor junior team members, sharing knowledge and best practices in voice AI architecture, TypeScript, and real-time systems.
Encourage a culture of continuous learning and technical excellence through pair programming and design reviews.
Document voice AI patterns, integration contracts, and operational runbooks for the team.
Partner with Product Managers, QA, and clinical operations to gather requirements, validate conversational designs, and guide projects from inception to deployment.
Coordinate with other engineering teams to integrate voice agents with internal services via authenticated APIs.
Work with the analytics team to ensure voice metrics flow correctly through the data pipeline for reporting and optimization.
Drive improvements in our multi-agent orchestration approach — tool calling patterns, agent handoff logic, and state management across conversation turns.
Advocate for high-quality standards and automated testing strategies for conversational AI systems, including voice-specific test patterns (simulated calls, transcript validation, latency benchmarks).
Identify and resolve voice-specific UX issues: ASR errors on medical terminology, silence detection tuning, barge-in recovery, and end-to-end response latency.

Requirements

What you’ll need

5+ years of overall software development experience, focusing on scalable backend services using Node.js and TypeScript.
1+ years of experience with voice AI, conversational AI, or real-time audio systems in production.
Hands-on experience with agentic LLM architectures — tool calling, multi-agent orchestration, prompt engineering, and conversation state management.
Familiarity with voice AI pipeline components: STT (Deepgram, Azure Speech, OpenAI Whisper), TTS (ElevenLabs, OpenAI, Cartesia), and LLM APIs (OpenAI Realtime API, Anthropic Claude).
Experience with telephony systems — Twilio (media streams, SIP, IVR) or equivalent WebSocket-based audio streaming platforms.
Understanding of voice-specific challenges: VAD configuration, turn-taking, interruption handling, latency budgets, and audio codec management (mulaw/PCM).
Solid understanding of the software development lifecycle (SDLC), including build, configuration, release, and deployment.
Knowledge of microservice architecture and distributed systems best practices.
Proficiency with AWS services (ECS Fargate, Lambda, DynamoDB, S3, Kafka/MSK, API Gateway).
Experience with event-driven architecture and message processing (e.g., Apache Kafka, SQS).
Strong relational database skills (MySQL) and exposure to NoSQL databases (DynamoDB, Redis).
Demonstrated teamwork skills and a collaborative mindset.
Excellent communication and organizational skills.
Experience with RAG architectures (AWS Bedrock, vector stores, embedding models) is a plus.

Benefits

Comp & perks

Competitive Benefits - Employee benefits include comprehensive medical, dental, vision, life and disability plans for eligible employees and their dependents.
Additionally, Natera employees and their immediate families receive free testing in addition to fertility care benefits.
Other benefits include pregnancy and baby bonding leave, 401k benefits, commuter benefits and much more.
We also offer a generous employee referral program!

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Node.jsTypeScriptvoice AIconversational AIreal-time audio systemsagentic LLM architecturesSTTTTSmicroservice architecturerelational databases

Soft Skills

teamworkcollaborative mindsetcommunicationorganizational skillsmentoringcontinuous learningtechnical excellencedesign discussionscode reviewstask prioritization