Senior Software Engineer - Leeds

Salary: £100,000 - 100,000 per year

Requirements

• 5 years professional Python experience
• Proven experience with real-time, low-latency systems
• Strong understanding of async and multiprocessing trade-offs
• Comfortable owning and improving existing codebases
• Experience with messaging/event-driven systems
• Strong API/schema discipline
• Production ownership mindset with monitoring and debugging skills
• Must be based in the UK with legal right to work
• Availability during core market hours required

Responsibilities

• Own and improve a production Python codebase that runs during market hours
• Build and optimize real-time market data pipelines for throughput and latency
• Perform profiling-driven performance work across ingestion, compute, messaging, and consumers
• Improve system reliability including freshness handling and fault isolation
• Strengthen developer leverage through tools for replay, simulation, and regression testing
• Work with cloud infrastructure, deployment, monitoring, and incident response
• Collaborate directly with the founder and engineering team on architecture and roadmap

Technologies

• API
• Cloud
• Python
• ETL
• Frontend
• Support
• Web
• Windows

More

We are hiring a Senior Software Engineer (Python) - Trading Systems to own and evolve a production options trading system. Our system runs during market hours and ingests real-time market data, requiring expertise in performance engineering to maintain tight latency and reliability bounds. We offer a competitive salary and performance-related bonus, with a mostly remote working style and occasional in-office collaboration days. You will have direct impact on a live system and high ownership over the system design and roadmap.

last updated 19 week of 2026