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Python Developer – Trading Systems
Location: London, UK (Hybrid)
Salary: Up to £120,000 + Bonus + Excellent Benefits
We're partnering with a leading global financial technology firm seeking a talented Python Developer to join its Middle Office Engineering team.
This is a fantastic opportunity to work on high-performance trading infrastructure, building the systems that power trade reconciliation, back-testing frameworks, and real-time trading monitoring. You'll collaborate closely with infrastructure, quantitative research, and treasury teams, solving complex engineering challenges in a low-latency, data-intensive environment.
What you'll be doing
- Develop robust, production-quality Python applications for business-critical trading systems
- Build tools and services that process large volumes of financial data
- Improve software performance, scalability, and throughput
- Design and implement new features across trade reconciliation, monitoring, and analytics platforms
- Collaborate with infrastructure and quantitative research teams to deliver high-quality engineering solutions
- Contribute to automated testing and continuous improvement of the development lifecycle.
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What we're looking for
- Strong commercial Python development experience
- Excellent knowledge of NumPy, Pandas, and SQL
- Experience writing automated tests for Python applications
- Ability to design clean, maintainable, and well-documented software
- Comfortable working independently while collaborating within highly technical teams
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Desirable experience includes:
- Test-driven development using pytest
- Airflow or similar workflow orchestration tools
- Polars
- CI pipelines (Jenkins or similar)
- WebSocket or TCP/IP networking
- pybind/nanobind
- Degree in Computer Science, Mathematics, or a related STEM discipline.
What's on offer
- Base salary up to £120,000
- Annual bonus
- Comprehensive benefits package
- Work on high-performance, business-critical trading systems
- Modern engineering culture with strong testing practices and collaborative development
- Excellent opportunities for technical growth within a world-class engineering environment.
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