Jane Street

Trades stocks, bonds and funds as a market maker

Low-Latency Engineer

Systems Software EngineeringConfirmed live in the last 24 hours

Full-timeNew York, NY, USA$250k - $300k /yrIn-person

About the Job

Requirements

Experience with low-level systems programming and optimization.
Experience working on network applications requiring extremely low latency and high throughput.
Ability to understand, interpret, and improve application performance using hardware performance counters and other profiling tools.
Thorough understanding of modern computer architecture, including modern x86 AMD and Intel cache hierarchies.
Experience with fast-packet processing in user space and common kernel-bypass implementations is ideal, including Solarflare OpenOnload, TCPDirect, ef_vi, Exablaze, InfiniBand verbs, or DPDK.
Experience working around the performance challenges of languages with a managed runtime, such as Java or C#.
Familiarity with a typed functional language is a plus.

Responsibilities

Work closely with quantitative researchers and developers.
Take a holistic approach to designing and optimizing fast-trading systems.

Desired Qualifications

Some experience with fast-packet processing in user space and common kernel-bypass implementations, such as Solarflare OpenOnload, TCPDirect, ef_vi, Exablaze, InfiniBand verbs, or DPDK.
Experience working around the performance challenges of languages with a managed runtime, such as Java or C#.
Familiarity with a typed functional language.

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].

Min salary: 250,000
Max salary: 300,000

About the Company

Jane Street

Trades stocks, bonds and funds as a market maker

Jane Street trades stocks, bonds, options, and exchange-traded funds with its own money as a market maker, a firm that constantly quotes prices to buy and sell so other investors can trade whenever they want. In 2025, it made more money from trading than JPMorgan Chase or Goldman Sachs, the biggest trading banks on Wall Street. Its traders, researchers, and engineers build computer-driven strategies that trade on exchanges and other venues around the world, and it also trades directly with large institutional clients. It earns the small gap between buying and selling prices across huge volumes, plus gains on positions it holds for minutes to days. Jane Street was founded in 2000 and is based in New York.

Company size: 1,001-5,000
Company stage: Debt Financing
Total funding: $90.6B
Headquarters: New York City, New York
Founded: 2000

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