Senior Front Office Software Engineer

Castleton Commodities International LLC; Greater London; On-site; GBP 125,000 - 150,000; Full time

Job summary

A global energy trading firm in Greater London is seeking a candidate to optimize trading processes and develop robust Python-based services for their analytics platform. The ideal candidate should have strong programming skills, preferably in Python, proficiency in SQL, and familiarity with AWS and Snowflake. This role requires effective communication across teams and an ability to thrive in a fast-paced environment. Competitive benefits are offered, including health insurance, employee assistance programs, and more.

Benefits

Comprehensive medical and dental benefits

Employee assistance and wellness programs

Parental and family leave policies

Tuition assistance and reimbursement

Quarterly Innovation & Collaboration Awards

Fitness facilities access

Competitive paid time off

Continued learning opportunities

Qualifications

• Strong professional experience in any programming language, Python is a plus.
• Proficiency in 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.
• Ability to communicate effectively across technical and non-technical audiences.
• Strong attention to detail and problem-solving skills.

Responsibilities

• Partner directly with traders and analysts to engineer and optimize trading processes.
• Build and maintain Python-based services and APIs for analytics platform.
• Develop solutions for supply and demand models and market data analysis.
• Design cloud-native tools including real-time analytics and workflow automation.

Skills

Programming languages (Python preferred)

SQL

DevOps practices

AWS exposure

Snowflake technologies exposure

Back testing engines

Energy and commodities trading experience

Communication skills

Problem-solving

Job description

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)

• Proficiency in 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.

• Ability to work effectively in a fast-paced, dynamic and high-intensity environment including an open-floor plan, 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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