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Low-Latency Engineer

Jane StreetNew York🇺🇸United StatesPosted Sep 28, 2026

Why This Role Stands Out

This role offers an exceptional opportunity to hone your low-latency systems expertise at a globally renowned firm, working on cutting-edge trading technology. You'll thrive here if you possess a deep understanding of computer architecture and a passion for performance optimization, with the company providing training in OCaml and financial markets. Apply now to join a collaborative environment where your technical contributions will have a significant impact.

Quick Overview

Seniority
Mid Senior
Work mode
Hybrid
Location
New York, United States
Posted
19 hours ago

Job Description

About the Position

We are looking for a Software Engineer with experience in high-performance, low latency systems. You’ll work closely with our quantitative researchers and developers, taking a holistic approach to design and optimize our fast-trading systems.

We build systems primarily in OCaml with only small amounts of C and C++, but you don’t need any experience with OCaml in particular (we can teach it to you) or knowledge of the financial markets. The most important qualification is experience with low level systems programming and optimization, whether it is in C, C++, or any other language.  

About You

  • Experience with low level systems programming and optimization, and working on network applications that require extremely low latency and high throughput
  • Can understand, interpret, and improve application performance through hardware performance counters and other profiling tools
  • Has a thorough understanding of modern computer architecture and can talk to others about it; for example, can you describe modern x86 AMD and Intel cache hierarchies?
  • Some experience with fast-packet processing in user space and common kernel-bypass implementations would be ideal (such as Solarflare OpenOnload/TCPDirect/ef_vi, Exablaze, InfiniBand verbs, DPDK)
  • Experience working around the performance challenges of languages with a managed runtime (such as Java or C#) and familiarity with a typed functional language are a plus

If you're a recruiting agency and want to partner with us, please reach out to agency-partnerships@janestreet.com.