Associate Front Office Software Engineer

Salary: £34,000 - 57,000 per year

Requirements:

• Bachelors or Masters degree in Computer Science or a related STEM field.
• 0-3 years of professional software engineering experience; talented new graduates are encouraged to apply.
• Strong foundation in computer science fundamentals, including data structures, algorithms, and software design principles.
• Proficiency in Python for backend development, including services, APIs, and data processing.
• Prior experience developing front-end applications using React, Angular, or TypeScript is preferred.
• Excellent problem-solving and analytical skills with strong attention to detail.
• Strong communication skills, with the ability to collaborate effectively with both technical and commercial teams.
• Must be able to work effectively in a fast-paced, dynamic, and high-intensity environment, including an open-floor plan if applicable, with timely responsiveness and the ability to work beyond normal business hours when required.
• Familiarity with cloud platforms such as AWS and data warehousing solutions such as Snowflake is preferred.
• Experience working in a Linux/Unix environment is preferred.
• Knowledge of DevOps practices and CI/CD pipelines is preferred.
• Prior exposure to, or a demonstrated interest in, finance, quantitative trading, or the commodities markets is preferred.

Responsibilities:

• Partner directly with traders and analysts to engineer and optimize trading processes, analytical models, and systematic strategies.
• Build and maintain scalable, high-performance Python services and APIs that power our analytics platform.
• Develop solutions to support supply and demand models, market data analysis, and strategy research.
• Design and implement cloud-native tools, including real-time analytics, visualization interfaces, and workflow automation, that integrate seamlessly into our Front Office platform.

Technologies:

• AWS
• Angular
• Backend
• CI/CD
• Cloud
• DevOps
• Support
• Linux
• Python
• React
• Snowflake
• TypeScript
• Unix

More:

We are Castleton Commodities International, a global leader in energy commodity trading and asset investment. Our Data Science & Technology team is central to our success, building high-performance systems and innovative tools that power our commercial decision-making. We develop cloud-native platforms, real-time analytics, back testing engines, third-party integrations, and internal libraries that support our front-office teams in understanding market behavior, forecasting price movements, and managing risk. This is a full-time role based in London, UK, with access to competitive benefits and programs, including medical, dental, retirement, and life insurance, employee assistance and wellness programs, parental and family leave, volunteer time, charitable contribution matching, tuition assistance, innovation awards, an employee discount program, paid time off, and continued learning opportunities.

last updated 34 week of 2026