Quantitative Developer at Quant Capital, London Area, £1000 per day

Senior Python Quant Developer

London- Hybrid

£1000 per day outside IR35

Quant Capital is urgently looking for a Senior Python Quant Developer to join a rapidly growing fintech.

Our client has built a global investment platform that helps investors analyse opportunities, collaborate and make more informed decisions.

They have developed a complex fixed-income model in C# and now need a strong Python engineer to work directly with the quants, understand the existing model and rebuild it into a clean, modular and production-ready Python codebase.

This is a hands-on role in a small team, with a high level of ownership and impact.

Responsibilities

• Re-engineer a complex C# quant model in Python.
• Refactor and modularise the existing codebase.
• Work directly with quants to productionise the model.
• Productionise the codebase by improving performance, testing and maintainability.
• Build data validation and orchestration processes.
• Work with Pydantic and PostgreSQL.

Required Skills

• Strong commercial Python experience.
• Good C# experience.
• Pydantic.
• PostgreSQL.
• Strong object-oriented programming skills.
• Experience working with complex numerical or data-heavy systems.
• Computer Science degree or similar technical degree.

Fixed-income or broader financial markets experience would be useful but is not essential.

This role would suit an independent developer who enjoys solving difficult technical problems and working in a small, high-impact team.