Senior Software Engineer

About the role

We're hiring an Senior Software Engineer to build the production systems behind our AI agents. These agents handle SMS, voice, and email conversations for enterprise operators, ensuring that mistakes are minimized.

Responsibilities

• Build and evolve LangGraph workflows that handle SMS and voice conversations for enterprise operators
• Ship features end-to-end across a Python/FastAPI backend and a Next.js/TypeScript dashboard
• Build the eval frameworks that catch agent regressions before they reach customers
• Integrate with messy real-world CRMs like Salesforce, ServiceTitan, LeadPerfection, and AccuLynx
• Partner with the voice team on real-time agent behavior using LiveKit and OpenAI Realtime
• Optimize the omnichannel experience across SMS, voice, and email

Requirements

• 4–8 years of full-stack experience shipping production software at a startup, high-velocity SaaS, or AI-driven company
• Production LLM experience — you've shipped LLM-powered features that real customers depend on, not just prototypes or internal tools
• Fluent in Python (FastAPI) and TypeScript (Next.js, React Query)
• Comfortable working in multi-tenant production systems — RLS, account-scoped queries, JWT-based access
• Experience debugging APIs, tracing distributed issues, and working with event-driven systems and unstructured data pipelines
• A continuous learner comfortable operating in ambiguity. You ship, learn, and adapt

Qualifications

• Customer-obsessed — you want to be close to the people using what you build

Skills

• LangGraph, LangChain, or other agent frameworks in production
• Real-time voice/audio work (LiveKit, Daily.co, Twilio Voice)
• Observability tooling for LLM systems (Langfuse, LangSmith, Helicone)

Benefits

• Base salary: $200,000–$275,000
• Equity: Competitive equity package
• Full-time, on-site in our NYC office, 5 days a week
• Significant upside through early ownership and career growth
• Benefits: Unlimited PTO, $0 cost medical, 401k matching, Lunch and dinner in office, Gym membership stipend, Clear Travel Pass, Tech equipment of your choice, Mentorship pairing with a Revin advisor/investor, Relocation assistance