Pax, Engineering
Software Engineer (Early Career) at Pax
- Location
- San Francisco, United States
- Compensation
- $130k-$170k + 0.50% Equity
Join Pax, the YC-backed 'AI control tower' for global trade that's already saving millions for enterprises like Glossier and Kodak. As an early-career engineer, you’ll ship production code in your first week and build LLM-powered agentic systems that transform how the world manages international trade compliance.
Role overview
As an early-career engineer at Pax, you will build agentic AI systems that navigate the complexities of global trade. You’ll own features end-to-end—from API design to crisp UI—transforming fragmented customs data into structured refunds. Working directly with founders from MIT and Brex, you’ll ship production code in your first week.
About Pax
Pax AI is a trade compliance and duty drawback software company that provides an AI-powered “control tower” platform for global trade compliance and tariff refunds. Its platform unifies import and export data, identifies all eligible customs duty, tariff, and fee refunds (duty drawback), and automates the preparation and electronic filing of compliant claims with U.S. Customs and Border Protection. Pax AI is positioned as an intelligence layer for trade compliance operations, using purpose-built AI to operate like a world-class compliance expert, recover every eligible dollar, and increase productivity and accuracy for importers of all sizes. The company focuses on modern, end-to-end duty drawback services and software, offering a TurboTax-like experience that turns complex customs regulations into algorithms so businesses can easily reclaim money that is rightfully theirs.
What you will do
- Own product features end-to-end, including designing robust APIs, implementing backend logic in FastAPI, and crafting high-quality React/Next.js interfaces.
- Build and deploy agentic LLM systems that process millions in annual trade volume by reconciling customs entries against thousands of pages of federal regulations.
- Work directly with enterprise clients to forward-deploy solutions, incorporating real-time feedback into the product to solve immediate global trade compliance challenges.
Who this is a fit for
- A dedicated builder with a portfolio of shipped projects, side projects, or open-source contributions that demonstrate deep technical curiosity and high ownership.
- Proficient in modern web development with hands-on experience using React, Next.js, and backend frameworks like FastAPI, SQLModel, or Postgres.
- A fast-learning engineer who thrives in high-energy, in-person environments and is eager to apply LLMs to solve complex, real-world data extraction problems.
Why this role is remarkable
- Ship a real feature to production in your first week and take full ownership of an entire product vertical within your first 90 days.
- Work alongside a world-class founding team including a PhD from MIT and repeat founders from Flexport, Brex, TikTok, and Amazon.
- Transform a 200-year-old industry by building LLM-powered audit agents that address a massive $10B/year opportunity hiding in plain sight.
How Jack & Jill work together

What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Pax wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.