Front Office Software Engineer

Castleton Commodities International LLC; London; On-site; GBP 50,000 - 80,000; Full time

Job summary

A leading global energy trading company seeks to enhance its Data Science & Technology department. Candidates will join a dynamic team, focusing on building cutting-edge tools and services that support trading processes, market analysis, and data-driven strategies in a high-performance environment.

Benefits

Competitive medical and dental benefits

Employee wellness programs

Parental and family leave

Charity volunteer days

Tuition assistance

Quarterly innovation awards

Paid time off

Learning opportunities

Qualifications

• Strong experience with Python and object-oriented programming.
• Advanced knowledge of SQL and relational databases.
• Familiarity with DevOps practices and cloud-native deployments.

Responsibilities

• Partner with commercial trading teams to optimize processes.
• Build and maintain Python-based services and APIs.
• Design solutions for supply-demand models and market data analysis.

Skills

Python

SQL

Problem Solving

Attention to Detail

Tools

Docker

AWS

Snowflake

Linux

Windows

Job description

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Castleton Commodities International (www.cci.com) is redefining how data and technology drive the future of global energy trading. Our Data Science & Technology team is at the forefront of this evolution, designing powerful systems and innovative tools that help our front-office teams understand market behavior, forecast price movements, and manage risk more effectively.

With a commitment to excellence and a modern, open-source technology stack, we solve complex, high-impact challenges at scale. From cloud-native infrastructure and machine learning platforms to real-time analytics, custom APIs, and internal libraries, we build the tools that give CCI a competitive edge in the global commodities markets.

If you're looking to build cutting-edge solutions in a high-performance trading environment, we’d love to hear from you. Apply today and take the next step in your technology career at CCI! What You Build:

• Partner directly with commercial trading teams to engineer and optimize trading processes and analytical models.

• Build and maintain Python-based services and APIs using modern frameworks and best-in-class design patterns.

• Design & develop solutions to support supply and demand models, market data analysis, and position management.

• Design cloud-native tools that integrate seamlessly into our Front Office platform, including visualization and analytics interfaces.

What You Bring:

• Strong professional experience with Python and deep understanding of object-oriented programming.

• 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 and Snowflake technologies is highly desirable.

• 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.

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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