# Founding Software Engineer at Copperlane

- Company: Copperlane (YC W26)
- What the company does: Agentic Mortgage Origination. Backed by Y Combinator.
- Company website: https://www.copperlane.ai
- Type: Startups (AI role)
- Level: Mid level
- Location: San Francisco, CA, US
- Work setup: On-site
- Pay: $140K to $220K base salary per year (USD)
- Posted: 2026-09-21
- Apply by: 2026-11-05
- Apply: https://www.ycombinator.com/companies/copperlane/jobs/RW3yRBp-founding-software-engineer
- Page: https://www.1752.vc/careers/jobs/copperlane-founding-software-engineer/

## About the role

We're looking for a founding software engineer (member of technical staff) who is obsessed with building agentic AI systems and wants to ship real product from day one. You'll work across the stack but spend most of your time on backend systems, building and orchestrating AI agents that interact with borrowers, loan officers, and third-party platforms in a regulated industry.

## What they're looking for

- Strong fundamentals in backend engineering (Python preferred)
- Hands-on experience building with LLMs: agent loops, tool calling, prompt engineering, evals
- Comfort with PostgreSQL, schema design, and migrations
- Exposure to multi-tenancy patterns, auth, or compliance-aware systems is a plus
- Bonus: sharp design sensibility and strong frontend skills (React, Vite, TanStack). We value engineers who care deeply about craft on both sides of the stack
- High energy, low ego, genuine curiosity about how things work

Tags: Engineering