Senior Python Quant Developer- Contract | Quant
About this role
Senior Python Quant Developer- Contract Senior Python Quant Developer London- Hybrid £750 p/d- 6 months contract minimum 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.
What this role is, and what else it is called
Employers in London advertise this kind of work as Software Engineer, Senior Software Engineer, Web Developer and Full Stack Developer too, so it is worth searching more than one wording. It is a senior Software Engineering role in London, advertised as hybrid, splitting time between home and the office.
About hiring at Quant Capital
Quant Capital has 3 other live technology roles on its careers page, across Software Engineering, IT Support & Service Desk and Networks & Telecommunications. Of those, 0% are advertised as fully remote and 25% as hybrid. Elsewhere in its adverts Quant Capital asks for PowerShell, C++, SQL, Linux and Windows Server. We have been observing Quant Capital hiring technology staff since May 2026. See all Quant Capital roles, salaries and stack.
How this role compares to the market
1,968 live UK roles list Python right now, from 583 employers. The median advertised salary is £80,000; 30% are advertised as remote. Browse Python roles.
1,026 live UK roles list C# right now, from 295 employers. The median advertised salary is £55,000; 31% are advertised as remote. Browse C# roles.
London has 4,322 live IT vacancies across 1,366 employers, with a median advertised salary of £70,000. Browse London roles.
Senior roles make up 1,633 of the live UK IT market and advertise a median of £80,000.
Market figures are today's snapshot of live UK roles on employer careers pages; see hiring trends.
Technologies mentioned
Detected on Quant Capital's careers page. ProdReady Recruitment lists this vacancy as an aggregator and is not the employer; applications go to the employer's own site. More IT jobs in London.