Senior Front Office Software Engineer

Posted:
11/24/2025, 4:00:00 PM

Location(s):
England, United Kingdom ⋅ Greater London, England, United Kingdom

Experience Level(s):
Senior

Field(s):
DevOps & Infrastructure ⋅ Software Engineering

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 the 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 backtesting engines, third party integrations, and internal libraries—all designed to give CCI a competitive edge in the global commodities markets. This role is an opportunity to build solutions that have a direct commercial impact from day one.

What You Build: 

  • Partner directly with traders and analysts to engineer and optimize trading processes, analytical models, and systematic strategies. 

  • Build and maintain robust, performant Python-based 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. 

What You Bring: 

  • Strong professional experience in any programming language (python would be a plus) 

  • Good knowledge of SQL and relational database technologies. 

  • Familiarity with modern DevOps practices. 

  • Exposure to AWS and Snowflake technologies is highly desirable. 

  • Prior experience building or working on back testing engines and systematic trading is a plus. 

  • Prior experience in energy or commodities trading is a major plus. 

  • 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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Castleton Commodities International

Website: http://www.cci.com/

Headquarter Location: Stamford, Connecticut, United States

Employee Count: 501-1000

Year Founded: 2001

IPO Status: Private

Last Funding Type: Debt Financing

Industries: Oil and Gas