Senior Python Engineer - Quantitative Trading - Selby Jennings in London

Key Responsibilities

• Design, build and maintain business-critical trading infrastructure and backend services.
• Develop systems across trade capture, position management, reconciliation and settlement workflows.
• Build scalable data platforms to support trading, risk and operational processes.
• Create internal tooling used by traders, quantitative researchers and operations teams.
• Improve the performance, reliability and scalability of existing systems.
• Collaborate closely with stakeholders across engineering, trading, quantitative research and operations.
• Take ownership of projects from design through to production deployment and support.
• Contribute to architectural decisions and engineering best practices across the platform.
• Troubleshoot complex production issues and continuously improve system resilience.

Key Requirements

• Strong commercial experience developing software in Python.
• Experience within trading, market making, electronic trading or financial markets technology.
• Strong knowledge of Linux environments and operating systems.
• Solid SQL and PostgreSQL experience.
• Experience building and operating production-grade backend systems.
• Exposure to market data, execution systems, position management, reconciliation or settlement platforms.
• Knowledge of C++ or other performance-oriented languages.
• Strong understanding of software engineering fundamentals, design patterns and system architecture.
• Experience working with distributed systems, messaging platforms or event-driven architectures.
• Excellent problem-solving skills and ability to work independently.
• Comfortable working directly with technical and non-technical stakeholders.