Senior AI Engineer (Voice + Data Infra) (Remote)

Procedure is hiring for WorkHero.WorkHero is building the AI-powered back office for the skilled trades, starting with the $50B+ HVAC industry. Small contractors are great at their trade but lose 20+ hours a week to invoicing, permits, scheduling, and paperwork. WorkHero combines expert office managers with automation and AI tooling, enabling a small team to take real ownership of that back-office workWe’re hiring a senior engineer to own our real-time voice stack end to end—AI agents operating on live phone calls—and the data platform that turns those calls into insight: call → transcript → events → warehouse → dashboards. You’ll own meaningful systems end to end alongside a small, senior team with deep experience in AI, product, and the trades.What you’ll buildNew product screens and flows (jobs, customers, invoices, scheduling) in React and React Native, especially AI chat UI (chat & tool result rendering, streaming responses, human review and feedback loops)AI workflows in production: tool-using agents, RAG/search, classification/extraction, and human-in-the-loop flowsAutomations: Contribute new features and improvements to our AI-powered business automation platformIn addition, you’ll own our first investments into a realtime voice stack and the call-data platform behind it. For example:Realtime voice agents on live phone calls: telephony/WebRTC integration, streaming speech-to-text and text-to-speech, turn-taking, interruption handling, and latency optimizationVoice pipeline reliability: backpressure, failover, graceful degradation, and monitoring for live callsCall-data pipeline: transcripts, events, and structured extraction flowing from every call into the warehouseAnalytics & dashboards: data modeling and conversation-intelligence features on top of call dataEvals & monitoring for voice agents: quality metrics, drift detection, and cost/latency trackingCloud infrastructure: scaling our platform with infrastructure as code, queues and orchestration, and CI/CDResponsibilitiesAnalyze requirements and propose innovative AI-native solutions to technical problemsWrite clean scalable codeOwn the voice and data stack end-to-end: design, build, test, deploy, and operateOptimize the performance, latency, and cost of our real-time AI systemsRespond to critical system issues and ensure continuous system reliabilityMentor team members and collaborate across teams, especially with product and subject matter expertsWork to understand the needs of our users and think creatively about how to solve design challenges in your workThis is a Remote role. We expect a minimum 4 hours overlap with the WorkHero team (11 AM - 3 PM ET).QualificationsSenior-level backend experience (typically 5+ years) shipping production systems that you've ownedHands-on experience with realtime voice or streaming systems: telephony (SIP/Twilio), WebRTC, streaming STT/TTS, or frameworks like LiveKit or Pipecat — or comparable experience with demanding realtime/streaming infrastructureData engineering fundamentals: event pipelines, data modeling, warehousing, and analytics on production dataStrong proficiency in a typed backend language (TypeScript preferred; comparable experience welcome)Hands-on experience with LLM-powered features (usage, prompting, optimization, etc) and AI architecturesThe ability to work with infrastructure as code (terraform), cloud, and CI/CD systems at scale. We're a small team, so we own the whole stack!Excitement to leverage AI coding tools to their maximum benefit. We love Claude Code and Cursor and are constantly looking for better ways to leverage our time to build fast and build for scale.Nice to haveexperience with voice-AI platforms (Vapi, Retell, Bland, Deepgram, LiveKit) or conversation-intelligence products (e.g. Gong-style analytics)experience scaling cloud infrastructure, especially AWS, and how to get the most out of key AWS servicesexperience with workflow automation tools like n8n or Lindyexperience with React for building internal dashboardsexperience with HVAC or back-office business workflowsWorkHero is committed to building a diverse team. We encourage candidates from all backgrounds to apply.