Python & C# Backend Engineer - Contract (City Of London)

My client is a cutting-edge data analytics and machine learning house, with an obsessive focus on research and large-scale data processing. Since redirecting their research firepower toward financial markets, they’ve built one of the most advanced and successful proprietary trading firms globally.

They are hiring exceptional Software Engineers to help drive a major uplift across their internal API and service infrastructure. This is an opportunity to join an environment where engineering is the business, and you’ll be building the foundations of a world-class trading platform with the smartest people in the industry.

What You’ll Do

You’ll join a cross-functional engineering team, working to:

• Design and build core APIs that standardise internal service boundaries.
• Surfacing services via their developer portal.
• Modernise internal tooling and improve developer experience.
• Enhance performance, automate, and improve infrastructure reliability.
• You’ll get to work across a modern stack in a highly autonomous environment where technical quality is everything.

Tech Stack You’ll Use

• Languages: Python and C#
• Infra & DevOps: Terraform, Docker
• Bonus: Java, SQL, experience with internal developer portals highly desired

Who You Are

• A pragmatic, experienced software engineer with strong Python and/or C# skills
• Comfortable working across a full stack, or interested in learning more about infrastructure
• Passionate about clean, scalable software and the developer experience
• Curious, sharp, and capable of working in a fast-moving trading environment

Why Apply?

• Work on greenfield projects with massive impact
• Collaborate with some of the top minds in tech and quantitative research
• Use the best tools available in a highly automated engineering culture
• Flexible hybrid model with a long-term, 12-month contract
• Unrivalled exposure to modern quant systems without the finance red tape

Apply now to help build the future of trading infrastructure at one of the sharpest quant firms in Europe.