Quantitative Developer - Paris | Systematic Investment Firm - Selby Jennings

Are you a passionate developer looking to take your career to the next level in Paris? Our client - a global leader in quantitative and systematic investment, expert in building advanced research and trading solutions across all liquid markets, is looking to hire!. Apply now and join a high‑impact team where innovation, collaboration, and technical excellence drive every decision.

As a Quantitative Developer, you will collaborate closely with quantitative researchers and trading teams to design and enhance systematic, data‑driven trading strategies. You will optimise high‑performance computing workflows, integrate complex datasets, and deliver production‑ready tools used in real time by trading desks worldwide. Your work will contribute directly to next‑generation trading models and execution capabilities.

Your Responsibilities

Work with quantitative traders to build systematic trading solutions

Develop and maintain real‑time tools that compute indicators powering advanced strategies

Build production‑quality Python applications supporting research workflows

Deliver robust systems in C# to drive high‑performance analytics and automation

Collaborate with researchers to extend scalable Python infrastructures

Enhance existing C# components powering core research and trading pipelines

Extend Python tooling for research and analytics

Optimise Python modules for high‑performance computations

Contribute to C# services supporting core infrastructure

Optimise C# codebases for performance and stability

Your Profile

Strong experience delivering production‑ready Python systems

Hands‑on experience in C# or similar languages (C/C++/Java)

Proven success building, deploying, and supporting production environments

Ability to thrive in a fast‑paced, collaborative technical setting

Excellent communication and interpersonal skills

Nice to Have

Experience in finance, particularly within a hedge fund or systematic environment

Exposure to technical leadership or architectural responsibilities

Knowledge of AWS or an equivalent cloud platform

Experience with dashboards or data visualisation tools

If you're seeking a cutting‑edge opportunity in Paris where Python, C#, and quantitative engineering meet world‑class research, this role offers an exceptional platform to grow.

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