Front Office Software Engineer

Castleton Commodities International; City Of London; On-site; GBP 80,000 - 100,000; Full time

Job summary

A global energy trading firm in London is seeking a Data Engineer to optimize trading processes and build Python-based services. The ideal candidate will have strong Python and SQL skills, experience in cloud-native deployments, and a passion for technology innovation. This position offers competitive benefits including comprehensive medical coverage and professional development opportunities.

Benefits

Comprehensive medical, dental, and life insurance benefits

Employee assistance & wellness programs

Tuition assistance & reimbursement

Competitive paid time off

Qualifications

• 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.

Responsibilities

• Partner directly with commercial trading teams to engineer and optimize trading processes.
• Build and maintain Python-based services and APIs using modern frameworks.
• Design cloud-native tools that integrate seamlessly into our Front Office platform.

Skills

Python

SQL

DevOps

Attention to detail

Problem-solving

Tools

Docker

AWS

Snowflake

Job description

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

• 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!