# Software Engineer (Senior) at Pax

- Company: Pax (YC S24)
- What the company does: AI Broker for Tariff Refunds. Backed by Y Combinator.
- Company website: https://paxai.com/
- Type: Startups (AI role)
- Level: Senior
- Location: San Francisco, CA, US
- Work setup: On-site
- Pay: $175K to $220K base salary per year (USD)
- Posted: 2026-08-25
- Apply by: 2026-10-09
- Apply: https://www.ycombinator.com/companies/pax/jobs/5OwUx0O-software-engineer-senior
- Page: https://www.1752.vc/careers/jobs/pax-software-engineer-senior/

## About the role

Entry and export audits: An AI agent that reviews customs transactions line by line and catches errors before they reach U.S. Customs and Border Protection. (Shipping now and you could own a meaningful part of it.) We’re well-capitalized, serve real enterprise customers, and are looking for a senior software engineer to take ownership of critical products and systems. This is an opportunity to join early enough to shape the company, its engineering culture, and the future of a $10B-plus industry.

## What they're looking for

- Has a strong record of building and shipping meaningful software at a high-growth startup or other demanding technical environment
- Has led substantial projects from an ambiguous problem through architecture, implementation, launch, and iteration
- Can go deep on backend architecture while caring deeply about product quality and a crisp user experience
- Writes reliable systems for complex, high-stakes workflows and knows where additional safeguards are necessary
- Is excited to build with large language models, understands their limitations, and thinks carefully about evaluation, reliability, and human oversight
- Makes sound tradeoffs between speed, simplicity, and scalability

Tags: Engineering