Senior Software Engineer, AI Full Stack
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Job Description
Senior full-stack engineer building AI-powered back-office software for HVAC contractors. Developing React, React Native, Node, and LLM-driven automation workflows.
Responsibilities:
- Build product experiences and AI systems across React, React Native, Node services, tool-using agents, and human-review loops
- Develop product screens and workflows for jobs, customers, invoices, and scheduling
- Build AI chat interfaces with tool-result rendering, streaming responses, human review, and feedback loops
- Create production AI workflows including tool-using agents, RAG/search, classification/extraction, and human-in-the-loop flows
- Contribute features and improvements to the AI-powered business automation platform
- Integrate and ingest data from third-party APIs, webhooks, and files
- Build evals and monitoring for prompt/workflow regression tests, quality metrics, drift detection, cost, and latency
- Design scalable queues, orchestration, retries, data models, and APIs
- Improve UX polish, reliability, accessibility, and performance
- Analyze requirements and propose AI-native solutions
- Write clean, scalable code
- Ship, test, and deploy full-stack features and services
- Optimize AI system performance
- Respond to critical system issues and ensure continuous reliability
- Mentor team members and collaborate with product teams and subject matter experts
- Understand user needs and solve design challenges creatively
- Maintain a minimum four-hour overlap with the WorkHero team from 11am–3pm ET
Requirements:
- Experience building and shipping production full-stack systems that you have owned
- Strong React fundamentals or equivalent modern frontend framework experience
- React Native experience is a plus
- Strong Node.js backend fundamentals using REST and/or GraphQL in a typed language; TypeScript preferred
- Hands-on experience with LLM-powered features, including usage, prompting, and optimization
- Experience with AI frameworks such as LangChain
- Experience with AI architectures such as RAG and reranking
- Experience building applications on MongoDB, Postgres, or equivalent modern databases
- Ability to work with infrastructure as code, including Terraform
- Experience with cloud and CI/CD systems
- Willingness to leverage AI coding tools such as Claude Code and Cursor
- Minimum four hours of work-hours overlap with the WorkHero team from 11am–3pm ET
- Experience with audio streaming and/or AI voice features is a plus
- Experience with workflow automation tools such as n8n or Lindy is a plus
- Experience with HVAC or back-office business workflows is a plus
- Mobile development experience, especially Expo and/or React Native, is a plus
- AWS experience is a plus
Benefits:
- Remote work
- Opportunity to own systems end to end alongside a small, senior team
- Collaboration with a diverse team and encouragement for candidates from all backgrounds to apply
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