Principal Software Engineer | Python | Commodities Trading | London

Principal Software Engineer | Python | Commodities Trading | London

Our client is a global investment manager with a strong footprint across major financial centres. They manage multi-asset, commodities, and derivatives strategies for institutional and wholesale clients worldwide.

The environment combines the scale and stability of an established asset manager with the agility of a tech-forward trading shop:

• High focus on alpha generation and risk management
• Strong investment in cloud-native, data-driven technology
• Close collaboration between trading, quant research, risk and technology teams

The firm is now looking for a strong, passionate and experienced Python Engineer to join the Front Office Technology team.

They are re-architecting the stack to be cloud-native on AWS , with Python at the core of backend services and libraries, and modern UIs built in React. Engineering culture is centred on clean code, TDD, and high automation.

📍London City, close to Liverpool Street Station, hybrid working model

💷Competitive Base package + Strong Bonus + Benefits

What you’ll do

• Write clean, well-structured Python code to build reusable components, services and libraries
• Design and build cloud-first solutions in AWS for pricing, risk, and analytics workflows
• Refine and extend the existing platform in response to desk and quant needs
• Work directly with traders, quants, and portfolio managers to co-create maintainable Python solutions
• Coach and develop more junior engineers; drive best practices across TDD, CI/CD, and code quality
• Contribute to the overall architecture of the investment and trading platform

Requirements for the role

• 7+ years of software development experience in an enterprise or financial environment
• 4+ years of hands-on Python development (ideally on data-heavy or mission-critical systems)
• Experience with cloud and serverless services (e.g. AWS Lambda, AppSync, DynamoDB or similar)
• Experience with both SQL and NoSQL databases
• Solid understanding of Python’s built-in libraries and commonly used third-party packages (e.g. for data, APIs, and async workloads)
• Strong grasp of data structures and data transformation patterns
• Experience working in modern engineering environments – Agile/Scrum, DevSecOps, CI/CD, Git/GitHub
• Ability to engage credibly with business stakeholders (traders, quants, product, risk) as well as technical peers

Nice to have

• Experience building software in Financial Services , within FX, rates, commodities, or derivatives trading; Portfolio analytics, risk, or performance measurement
• Understanding of front office workflows and trade lifecycles
• Experience integrating with market data, pricing libraries, or OMS/EMS platforms

Who you are:

• A hands-on technologist who keeps up with modern Python and cloud engineering practices
• Curious about how technology drives trading performance and risk control
• Comfortable owning work from concept to production and support
• Focused on understanding the business problem before writing code
• Collaborative, open, and keen to share ideas and improve the wider engineering culture

If you are interested in this Python Engineering Role, please apply directly to this advert with your updated CV or email it to Chantelle.Smith@sourcegroupinternational.com