Senior Software Engineer

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

Benefits offered by this job

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

Job summary

Revin Inc. is seeking an AI Systems Engineer to develop the production systems behind their AI agents for SMS, voice, and email conversations. The ideal candidate should have 4 to 8 years of full-stack software experience, strong knowledge of Python and TypeScript, and expertise in building production LLM systems. This on-site role in New York offers a competitive salary range of $200,000 to $275,000 plus equity, unlimited PTO, and various benefits including a relocation assistance and mentorship pairing.

Qualifications

• 4-8 years of full-stack experience shipping production software at a startup, high-velocity SaaS, or AI-driven company.
• Production LLM experience that real customers depend on.
• Comfortable working in multi-tenant production systems.

Responsibilities

• Build and evolve LangGraph workflows for enterprise operators.
• Ship features end-to-end across a Python/FastAPI backend and Next.js/TypeScript dashboard.
• Integrate with messy real-world CRMs.

Skills

Full-stack experience

Production LLM experience

Fluent in Python

Fluent in TypeScript

Debugging APIs

Customer-obsessed

Tools

FastAPI

Next.js

Salesforce

ServiceTitan

OpenAI Realtime

Job description

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 AI Systems 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 evaluation 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

Compensation Range

$200K - $275K