At a glance
- Pay
- $150k – $200k/yr
- Type
- Full Time
- Location
- Redwood City, California
- Posted
- May 13, 2026
- Visa sponsorship
- SometimesFrom recent H-1B filings
- Company size
- Startup (1-50)
- Industry
- Finance/FinTech
About the role
What you’ll do
As founding software engineer, you will be a core contributor to our ultra-low latency matching engine, implementing its technology as a hw/sw co-design in Rust.
PAX ultra low-latency in-silicon matching engine
PAX is building the world's first exchange and co-located trading facility on a chip. We will go-to-market using AWS F2 FPGA instances and follow-on with an ASIC design that combines network aggregation with exchange functionality.
PAX provides the fastest tick-to-trade and market data publication in the world, across all exchanges (e.g. faster than NYSE, Deutsche Börse, etc.).
Exchange integrated high frequency trading logic
The PAX λ API provides traders with on-chip exchange integrated HFT decision logic. Using the λ API, traders can make markets or take arbitrage opportunities. The λ API enables traders to respond to market events the very instant the information is registered in the exchange matching engine.
PAX business model
PAX sells access to its ultra-low latency λ API and offers trading otherwise for free. Existing exchanges typically offer rebates for liquidity providers ("makers") and charge fees to liquidity takers (the "maker/taker" fee structure). At PAX when λ and non-λ orders pair together, the free-tier order is given a cash rebate regardless of whether their order was characterized as making or taking. PAX is the first exchange to offer zero-fee trading and rebates for both making and taking.
Deep dives on PAX market structure & technology
- On-exchange trading incentives with inherent price competition.
- PAX rebates & fees.
- PAX λ API.
Relevant background
Candidates with experience in high frequency trading (HFT) or at an exchange are encouraged to apply.
Skills
Rust and/or C++
HFT
Protobuf
Curiosity and ability to learn
Passion for trading and markets
About PAX Markets
More open roles at PAX Markets
Be first in line for the next PAX Markets role
Scoutify watches 70,000+ companies and alerts you the moment a matching job posts. It can even apply for you before the rush.