Functional Software Engineer

Overview

Functional Software Engineer – Research & Quant Foundations (RQF)

You must have experience in Functional programming, using one of the following F#, Haskell, Rust, Lisp, Erlang, OCaml, Caml along with Python. You will not be considered if you haven't.

Experience: 4 years, varying levels of experience being considered.

Hires: 3+

We’re working with a top-tier quantitative research and systematic trading firm operating one of the most advanced trading platforms in the world.

Their systems are fully automated, globally distributed, and run at extreme scale - executing millions of trades per day
. Platform resilience, uptime, and operational efficiency are mission-critical.

As a Functional Software Engineer within the Research & Quant Foundations (RQF) group, you’ll sit at the core of the platform, building systems that enable quant researchers to move faster across a vast compute estate. The focus is on abstracting complexity
, improving developer experience, and ensuring large-scale research workloads run smoothly and reliably.

This is a high-bar engineering role for people who care deeply about functional design, correctness, and software quality.

What you’ll be working on

• A core scheduling platform written in F#, responsible for distributing very large workloads across massive compute farms
• Python and .NET SDKs that form the primary day-to-day interface used by researchers
• A Type Script/React UI backed by an F# ASP.NET service
  , Postgres, and Kubernetes, providing real-time visibility into workload execution
• Tooling and frameworks that enable researchers to build and deploy research platforms and express computations over streaming data
• Foundational systems designed for performance, safety, expressiveness, and long-term maintainability

The codebase is approximately 75% F#, with the remaining 25% primarily Python and Rust. Day-to-day work includes high-end, production-grade Python, but the engineering culture is strongly rooted in functional programming principles
.

What they’re looking for

• Strong interest and experience in functional programming
• 4+ years of software engineering experience in high-bar environments
• Excellent programming ability with a deep focus on code quality and design
• Experience with one or more of: F#, Haskell, Rust, Lisp, Erlang, OCaml, Caml
  , or similar
• Professional Python experience beyond scripting or notebooks
• An engineer who genuinely cares about developer experience
• Exposure to compiler work or language tooling is a strong plus
• MSc or PhD in Computer Science (or equivalent depth of technical background) is highly desirable

This team hires exceptionally well and is scaling deliberately, with three new hires planned
.

If you’re excited by functional programming, large-scale distributed systems, and building foundational tooling that world-class researchers rely on every day, this is a standout opportunity.