Senior Software Engineer
Revin · New York City · $225,000–$275,000 (stated in the posting)
Senior Software Engineer
Location: New York, NY (On-site, 4 days a week)
Compensation: $225,000–$275,000 + equity
Employment: Full-time
Department: Engineering
About Revin
Revin builds AI-powered software for the businesses that keep our homes running: roofing, HVAC, plumbing, remodeling, and more. We help these businesses respond to customers, book appointments, and manage the customer experience across voice, SMS, and email.
Revin handles around half a million customer conversations a month. Businesses with hundreds of millions in annual revenue rely on our products for work that directly affects their customers and their bottom line.
Our customers include Vertex Service Partners, a national roofing and exterior-services platform with over $600M in revenue, and Del-Air, a $300M+ HVAC and plumbing business.
See the impact of our work: we’ve helped Del-Air book 11,000+ membership appointments, while ImproveIt uses Revin to set 34% of its booked appointments.
We’re still early, with substantial room to shape the product, the team, and the business. You’ll join a small team of sharp, ambitious people and receive meaningful equity ownership in the company you’re helping build.
About the Role
We’re hiring a Senior Software Engineer to build the production systems behind our AI agents: the agents that handle SMS, voice, and email conversations on behalf of $100M+ home-services operators. When our agent makes a mistake (books outside hours, dispatches to the wrong zip code, promises a service the business doesn’t offer), it costs our customers real money. Your job is to build the systems that prevent that.
This is a high-ownership role. You’ll work end-to-end across a Python/FastAPI backend, a Next.js/TypeScript dashboard, and the LangGraph workflows that drive agent behavior. You’ll partner directly with product, design, and leadership, ship in production, and influence the direction of the platform.
What You Will Do
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
Work in a multi-tenant Supabase/Postgres environment where every query is account-scoped (RLS, JWT-based access)
Build the eval frameworks that catch agent regressions before they reach customers; we treat eval quality as a first-class engineering discipline
Integrate with messy real-world CRMs (Salesforce, ServiceTitan, LeadPerfection, AccuLynx) where the data is never clean
Partner with the voice team on real-time agent behavior (LiveKit + OpenAI Realtime)
Optimize the omnichannel experience across SMS, voice, and email
Who You Are
4–10 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.
Customer-obsessed: you want to be close to the people using what you build
Bonus:
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)
Don’t Apply If
You wait for instructions instead of taking initiative
You want a predictable, low-ownership role. We move fast, ship in production, and own outcomes end-to-end. If you’re optimizing for predictability, this won’t be a fit.
You’re not excited about applying AI to the built world. There’s no playbook here. If you want a well-trodden path, this isn’t the role.
Compensation & Benefits
Base Salary: $225,000–$275,000
Equity: Competitive equity package
Full-time, on-site in our NYC office, 4 days a week
Significant upside through early ownership and career growth
Benefits
Unlimited PTO
$0-cost medical
401(k) matching
Lunch and dinner in office
Gym membership stipend
CLEAR Travel Pass
Tech equipment of your choice
Mentorship pairing with a Revin advisor or investor