Senior Software Engineer – Voice AI Platform

Parlance Corporation; Woburn (MA); Sur place; USD 150 000 - 230 000; Plein temps

Résumé du poste

Parlance is building a healthcare-focused voice AI platform. We seek a senior software engineer to own end-to-end development of real-time voice agents, from telephony and media to LLM-driven logic and backend services.

You will work on Python backend, frontend touchpoints, and cloud deployments, solving complex production challenges and delivering robust integrations with FHIR and EHR systems. This is a hands-on, high-impact role in a small, experienced team.

Qualifications

• 6+ years building production software with strong Python backend and full-stack capabilities.
• Hands-on experience building voice agents on real-time frameworks (Pipecat, LiveKit, Vapi, Retell, Daily).
• Working knowledge of real-time media and telephony (WebRTC, SIP, audio codecs).
• Experience integrating LLMs into production systems (prompt design, function calling, evals).
• Solid API design, testing, CI/CD, containers, and cloud deployment (Azure preferred).
• Strong debugging skills and ability to operate with ambiguity without a full spec.

Responsabilités

• Design and build real-time voice agents with SPIs, TTS pipelines, and latency tuning.
• Own features across stack: telephony connectivity, backend services, and internal dashboards.
• Build and extend services connecting agents to healthcare systems (FHIR/EHR integrations).
• Diagnose production issues: audio quality, call flows, model behavior, distributed systems.
• Set up observability to monitor voice agents and detect failures.
• Contribute to architecture decisions, code reviews, and maintain engineering quality.
• Collaborate with product, customer success, and clients to deliver working software.

Connaissances

Python

Frontend (React/TS)

APIs

CI/CD

Cloud deployment

Real-time media

LLMs

Debugging

WebRTC

SIP

Outils

Pipecat

LiveKit

Vapi

Retell

Daily

Description du poste

Senior Software Engineer – Voice AI Platform

About the role

Parlance builds conversational voice AI for healthcare — patient-facing agents that answer calls, verify identity, schedule, and reach into EHRs like Epic, Cerner, Meditech, and Athena to get things done. We are looking for a senior full-stack engineer who has shipped on a modern voice agent stack and can own problems end to end: from telephony and real-time media, through orchestration and LLM logic, to the APIs and data services behind it. This is not a narrowly scoped integrations role. You will be one of the engineers shaping how our next-generation voice platform is built.

What you'll do

• Design and build real-time voice agents on frameworks such as Pipecat, LiveKit Agents, or comparable platforms — STT/TTS pipelines, turn-taking, interruption handling, latency tuning
• Own features across the stack: telephony/CCaaS connectivity (SIP, WebRTC, Five9/Webex CC), backend services in Python, and the internal tools and dashboards the team runs on
• Build and extend the services that connect agents to healthcare systems — FHIR-based EHR integrations, scheduling, and patient data access — with the security and reliability healthcare demands
• Debug hard problems in production: audio quality, call flow failures, model behavior, and distributed-system issues across cloud, telephony, and third-party APIs
• Set up evaluation and observability for voice agents so we know when they are working and when they are not
• Contribute to architecture decisions, review code, and raise the bar for the team
• Work directly with product, customer success, and customers to turn ambiguous requirements into shipped software

What we're looking for

• 6+ years building production software, with strong depth in Python and comfort across backend, frontend, and infrastructure
• Hands-on experience building voice agents on Pipecat, LiveKit, Vapi, Retell, Daily, or a similar real-time framework — you have dealt with barge-in, latency budgets, and flaky audio, not just a demo
• Working knowledge of real-time media and telephony: WebRTC, SIP, audio codecs, streaming STT/TTS (Deepgram, ElevenLabs, Cartesia, Azure Speech, or similar)
• Experience integrating LLMs into production systems — prompt design, function calling, structured outputs, evals
• Solid engineering fundamentals: API design, testing, CI/CD, containers, cloud deployment (Azure preferred; AWS/GCP fine)
• Strong debugging instincts and the ability to work through ambiguity without waiting for a spec
• Clear written and verbal communication
• Nice to have Healthcare integration experience: FHIR, HL7, EHR APIs, HIPAA-aware engineering
• Contact center platform experience (Five9, Genesys, Webex CC, Amazon Connect)
• Experience with CCaaS/IVR migration or replacing legacy speech platforms
• Frontend experience with React/TypeScript for Web Portal

Why Parlance

Small, senior engineering team with real ownership. Real patients on the other end of every call. Backed by Constellation Software, so the stability of a large company with the pace of a small one.

Compensation & eligibility

Candidates must be authorized to work in the United States; we are unable to sponsor employment visas now or in the future.

Worker Type

Regular

Number of Openings Available

1

About Parlance

Parlance delivers virtual assistants in the voice channel to hospital switchboard and RCM contact center operations — providing better navigation for healthcare consumers, autonomously verifying patient identities, managing appointments, answering FAQs, and more.