Location: Menlo Park, CA   |   Full-Time
Software Engineer Crypto Exchange Fintech HFT Ultra-low latency API Backend Systems Programming C++ Rust Go Java Founding Engineer YC W25 Menlo Park Full Stack Engineer Back End Engineer Staff Engineer 
Company: PAX Markets (YC W25)
Location: Menlo Park, CA
Website: https://pax.markets

PAX Markets is building a crypto exchange on a single silicon chip, aiming to be the fastest exchange from crypto to Wall Street. We offer ultra-low latency market access (nanosecond tick-to-trade) for HFT participants via our unique on-chip λ API, and zero-fee trading with cash rebates for all other users.

Role: Founding Software Engineer
We are seeking a talented and driven Founding Software Engineer to join our early-stage team. As a founding engineer, you will play a critical role in designing, developing, and deploying the core software infrastructure of the PAX exchange. This includes building robust backend systems, developing APIs (including enhancing the λ API), and potentially working across the stack. You'll work closely with hardware engineers and the founding team to bring our vision of a nanosecond-latency exchange to life.

Responsibilities:
*   Design, build, and maintain scalable, high-performance software systems for the exchange.
*   Develop and implement core trading functionalities and APIs.
*   Collaborate with hardware engineers to integrate software with the custom silicon/FPGA platform.
*   Contribute to system architecture decisions and technology choices.
*   Write clean, maintainable, and well-tested code.
*   Help shape the engineering culture and processes of a growing startup.

Ideal Candidate:
*   Strong proficiency in systems programming languages (e.g., C++, Rust, Go, Java).
*   Experience building low-latency, high-throughput systems, preferably in fintech or HFT.
*   Understanding of financial markets, exchange architecture, and trading protocols is a plus.
*   Experience with network programming and distributed systems.
*   Familiarity with cloud platforms (e.g., AWS) and potentially FPGAs.
*   Ability to work independently and take ownership in a fast-paced startup environment.
*   Passionate about cryptocurrencies, trading technology, and building innovative products.
*   Bachelor's or Master's degree in Computer Science or related field.
Post Date: May 13, 2025