Jane Street

Jane Street

Posted via Greenhouse

Low-Latency Engineer

Posted Sep 3, 2026

Role at a glance

Job function
Software Engineering & IT Systems Software Engineering
Salary
Not Disclosed
Location
New York, New York, United States
Work arrangement
On-site
Employment
Full-time
Experience
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

Spotted an issue?

We’ll check it against the original posting.

Log in to report

Role Summary

AI-generated

The Low-Latency Engineer works with quantitative researchers and developers to design and optimize fast-trading systems. The role focuses on high-performance, low-latency systems.

What You'll Do

  • Design and optimize fast-trading systems.
  • Work closely with quantitative researchers and developers.

Generated from the employer's posting. Verify important details before applying.

View full posting

Qualifications

Experience with low-level systems programming and optimization, including network applications requiring extremely low latency and high throughput; ability to improve application performance using hardware performance counters and other profiling tools; and thorough understanding of modern computer architecture. Low-level systems programming and optimization is identified as the most important qualification, and may be in C, C++, or another language. OCaml experience and financial-markets knowledge are not required.

Required

  • Experience with low-level systems programming and optimization, and working on network applications that require extremely low latency...
  • Ability to understand, interpret, and improve application performance through hardware performance counters and other profiling tools.
  • Thorough understanding of modern computer architecture.

Preferred

  • Some experience with fast-packet processing in user space and common kernel-bypass implementations (Solarflare...
  • Experience with performance challenges of managed-runtime languages such as Java or C#, and familiarity with a typed functional...

Original job description

Content provided by the employer
View on company site

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 [email protected].

Jane Street

About the company

Jane Street

Large Enterprise

Jane Street is a global trading firm that specializes in quantitative and algorithmic trading across various asset classes, including equities, options, and fixed income. Founded in 2000, the company leverages advanced technology and data analytics to drive its trading strategies while maintaining a strong commitment to risk management and collaboration. Known for its dynamic and intellectually stimulating work environment, Jane Street also places a high value on continuous learning and professional development, making it an attractive workplace for individuals interested in finance, mathematics, and computer science.

Apply