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.

They are seeking a Senior Software Engineer (Python) to join a core options trading strategy development team in Dublin. This role sits close to trading and quantitative research, building critical platforms that underpin research, analysis, and live trading.

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.

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• 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
  

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• 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. NumPy, pandas, SciPy)
  
• 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
  

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• 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 xcfaprz to learn new technologies and propose innovative technical solutions
  
• Self‑motivated, accountable, and comfortable working in a fast‑paced trading environment
  

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• 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
  

Dublin, County Dublin, Ireland

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• Seniority level: Mid‑Senior level
  
• Employment type: Full‑time
  
• Job function: Finance
  
• Industries: Capital Markets, Financial Services, and Investment Management