Senior Software Engineer

EngRadar; New York (NY); On-site; USD 200,000 - 275,000; Full time

Benefits offered by this job

Unlimited PTO

0 cost medical

401k matching

Relocation assistance

Job summary

Revin is hiring a Senior Software Engineer to build the production systems behind our AI agents that handle SMS, voice, and email conversations for $100M+ home-service operators. You will own end-to-end development across a Python/FastAPI backend, a Next.js/TypeScript dashboard, and the LangGraph workflows to drive agent behavior.

You will ship in production, partner with product, design, and leadership, and help scale the platform while ensuring reliability and real-time responsiveness in

Qualifications

• 4-8 years of full-stack experience shipping production software at a startup, high-velocity SaaS, or AI-driven company
• Production LLM experience — shipped LLM-powered features that real customers depend on
• Fluent in Python (FastAPI) and TypeScript (Next.js, React)
• 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

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
• 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

Skills

Full-stack

Python FastAPI

TypeScript Next.js

LLM features

Multi-tenant systems

Production engineering

Job description

Revin provides operators with an end-to-end system of intelligence to automate and scale revenue in the built world.

Senior Software Engineer

Location: New York, NY (on-site, 5 days a week)

Compensation: $200,000–$275,000 + equity

Employment: Full-time

Department: Engineering

About Revin
At Revin, we're bringing AI to the built world. Millions of operators across home services, construction, and remodeling have been overlooked by the last wave of technology. We're building the system of intelligence that lets them automate and scale revenue.
Today, over $2.3B in revenue runs on Revin, making us the #1 AI partner for enterprise operators in this market. Our customers include Sears Home Services ($800M), Astara Capital ($700M), Del Air ($150M), Long Home Remodeling ($150M), ImproveIt Remodeling ($100M), Sage Home ($80M), and more.
We've raised $10M from Stellation Capital, 1Sharpe, Gokul Rajaram, Russ Heddleston, Michael Werner, Tandem, Max Branzburg, and Marc Bhargava.

About The Role

We're hiring an 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

• 4-8 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.
• 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 And 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