Castleton Commodities International (https://www.cci.com) is a global leader in energy commodity trading and asset investment. Our Data Science & Technology team is central to our success, engineering the high-performance systems and innovative tools that power our commercial decision-making. We build platforms that help our front-office teams understand market behavior, forecast price movements, and manage risk.

Our team solves complex, high-impact challenges using a modern technology stack. We develop everything in cloud-native infrastructure from real-time analytics to back testing engine, third party integrations, and internal libraries, all designed to give CCI a competitive edge in the global commodities markets.
We are seeking a Front Office Software Engineer to join our Data Science & Technology (DS&T) team in London, sitting at the intersection of technology and trading. The initial scope of work for this role will be centered on short-term power initiatives, building tools and systems that directly enable traders and quantitative analysts to test and execute strategies efficiently in fast-moving power markets. This includes delivering production-grade tools, data services, and real-time applications that enhance decision-making and strategy deployment for the European Intraday Power desk. The successful candidate will design, develop, and maintain real-time trading applications, analytics platforms, and data pipelines that are critical to systematic trading and risk management workflows. This is an exciting opportunity to work within a fast-paced, data-driven trading environment, contributing directly to systematic trading and risk management efforts.

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.

• Design and build a robust, reusable framework that integrates seamlessly with the Data Science & Technology data platform to support back-testing activities.

• Ensure low-latency data access and efficient system performance across real-time price feeds, position tracking, and order execution tools.

• Partner with Data Engineers to integrate live and historical market data for modeling, forecasting, and back-testing workflows.

Qualifications:

• Bachelor’s degree in Computer Science, Engineering, Mathematics, or related field of study.

• 10+ years of professional Software Engineering experience in Python, leveraging modern frameworks, APIs, and cloud-native architecture, with a minimum of 5 years supporting Intraday Short-Term Power trading or similar real-time energy market environment.

• Strong foundation in Computer Science fundamentals, including data structures, algorithms, and software design principles.

• Familiarity with fundamental and weather datasets, as well as market data sources such as EPEX, ENTSO-E, or Nord Pool.

• Advanced knowledge of SQL and relational database technologies.

• Familiarity with DevOps practices, including Docker and cloud-native deployments.

• Experience in Linux and Windows environments.

• Exposure to AWS & Snowflake technologies is highly desirable.

• Ability to communicate effectively across technical and non-technical audiences.

• Strong attention to detail, problem-solving skills, and a passion for technology innovation.

• Must be able to work effectively in a fast-paced, dynamic and high-intensity environment including open-floor plan if applicable to the position, with timely responsiveness and the ability to work beyond normal business hours when required.  ​

Employee Programs & Benefits:

CCI offers competitive benefits and programs to support our employees, their families and local communities. These include:

• Competitive comprehensive medical, dental, retirement and life insurance benefits

• Employee assistance & wellness programs

• Parental and family leave policies

• CCI in the Community: Each office has a Charity Committee and as a part of this program employees are allocated 2 days annually to volunteer at the selected charities.

• Charitable contribution match program

• Tuition assistance & reimbursement

• Quarterly Innovation & Collaboration Awards

• Employee discount program, including access to fitness facilities

• Competitive paid time off

• Continued learning opportunities

Visit  https://www.cci.com/careers/life-at-cci/# to learn more!

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