About the role

Aplyr's Quick Take

This role is for a Low-Latency Engineer focused on optimizing high-performance trading systems. You'll collaborate with researchers and developers to enhance software performance, primarily using OCaml, though prior experience with it isn't required. It's a hands-on, technical role that demands expertise in low-level systems programming and network applications.

Good fit

Ideal candidates have a strong background in low-level systems programming, particularly in C or C++, and are comfortable with performance optimization. Those who thrive here are likely detail-oriented problem solvers with a solid understanding of computer architecture.

Worth noting

The company is open to teaching OCaml, which is a plus for those without prior experience in it. However, the role may involve complex performance challenges, which could be demanding for some.

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.

Skills & Tags

java ai design

Aplyr's read

Jane Street is a leading quantitative trading firm where tech and finance intersect, attracting analytical minds who thrive in a fast-paced, data-driven environment.
Synthesized from recent postings & public sources

What's promising

•Jane Street offers a highly collaborative environment with a strong focus on mentorship and learning.
•The firm is renowned for its innovative use of technology in trading strategies.
•Competitive compensation packages reflect the high value placed on talent and expertise.

What to watch

•The high-pressure environment may not suit everyone, especially those seeking work-life balance.
•Limited public information about career progression and long-term employee retention.
•The firm's focus on quantitative skills may limit opportunities for those from non-technical backgrounds.

Why Jane Street

•Jane Street's flat organizational structure encourages open communication and idea sharing.
•The firm is known for its rigorous and intellectually challenging interview process.
•Strong emphasis on using cutting-edge technology to drive trading decisions.

Aplyr’s read is generated by AI from public sources. Was it useful?