Senior Software Engineer

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