Senior Software Engineer; Python | Trading Technology

Our client is a leading global proprietary trading firm operating at the intersection of technology, quantitative research, and financial markets. With a strong engineering culture and a long-term outlook on technology investment, they build highly performant, research-driven trading systems that operate at scale across global markets.

As a Senior Software Engineer, you will be responsible for the ongoing development, maintenance, and evolution of a Python-based quantitative research and trading platform. This platform enables researchers and traders to rapidly analyse data, test ideas, and deploy new trading strategies in a production environment.

You will work closely with Traders, Quantitative Researchers, and Strategy Developers, contributing directly to new trading capabilities and improving the performance, stability, and usability of core systems.

• Design, build, and maintain a Python-based platform supporting quantitative research and trading
• Continuously improve system stability, performance, and usability
• Collaborate directly with traders and quantitative researchers to enable new trading behaviours and workflows
• Work with large-scale datasets, building and maintaining production‑grade data pipelines
• Develop and support distributed, message‑based systems used in live trading environments
• Participate in the deployment, monitoring, and support of production systems
• Contribute ideas and technical solutions to improve processes, tooling, and architecture

• Degree in Computer Science, Engineering, or a related technical/scientific discipline
• 5+ years of professional Python development experience
• Strong experience with the Python scientific ecosystem (e.g. Num Py, pandas, Sci Py)
• Experience building server‑side software and distributed, message‑based systems
• Exposure to web services and Python development frameworks
• Experience across the full software development lifecycle
• Familiarity with agile development practices

• A pragmatic engineer who enjoys working close to the business and seeing real‑world impact
• Someone comfortable owning systems and driving continuous improvement
• Strong communication skills and the ability to work effectively with non‑engineering stakeholders
• High attention to detail and the ability to adapt to changing priorities
• A willingness to learn new technologies and propose innovative technical solutions
• Self‑motivated, accountable, and comfortable working in a fast‑paced trading environment

• Work directly on systems that influence real‑time trading decisions
• Collaborate with top‑tier traders and quantitative researchers
• Operate in a meritocratic, low‑bureaucracy engineering culture
• Tackle complex technical and data challenges at scale
• Long‑term, stable environment with significant investment in technology

Apply Now!