Software Developer - Clearing Technology

Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets.

The group provides comprehensive breadth and depth of coverage across four core services: clearing, agency and execution, market making, and hedging and investment solutions. It has a leading franchise in many major metals, energy and agricultural products, with access to 60 exchanges. The group provides access to the world’s major commodity markets, covering a broad range of clients that include some of the largest commodity producers, consumers and traders, banks, hedge funds and asset managers.

With more than 40 offices worldwide, the group has over 3,000 employees across Europe, Asia and the Americas.

The Technology Department delivers differentiation, scalability and security for the business. Technology provides digital tools, software services and infrastructure globally to all business groups. Software development and support teams work in agile ‘streams’ aligned to specific business areas. Our other teams work enterprise-wide to provide critical services including our global service desk, network and system infrastructure, IT operations, security, enterprise architecture and design.

The Software Development function creates and maintains applications, frameworks and other software components to deliver to business requirements. Developers conceive, specify, design, engineer, document, test, and deliver bug fixes as needed to provide high quality software solutions. Each Development team is aligned to one of Marex’s business divisions and works with a corresponding Business Technology and Application Support team.

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As a Senior Full Stack Developer specialising in C# .NET, you will be a pivotal member of our Software Development team in Clearing Technology, driving an AI-first approach to the creation and enhancement of secure, responsive web-based platforms. Marex is a full clearing member of major financial exchanges – across energy, commodities, metals and financial markets.

You will leverage modern AI-assisted development tools and practices to accelerate delivery, improve code quality, and enhance developer productivity, while ensuring solutions meet the high standards of control, auditability, and reliability required within financial systems, including compliance with SOX (Sarbanes‑Oxley) requirements.

Your expertise as a full stack developer in C# .NET and Node.js will be instrumental in delivering robust, scalable, and well‑governed applications. You will maintain a strong emphasis on testing, traceability, and deterministic system behaviour.

• Design, develop, and test components of modern, secure web‑based post trade platforms, applying AI‑assisted development practices to improve quality and delivery speed.
• Contribute to the overall architecture and design of technology solutions, incorporating AI‑enabled tooling and automation while ensuring control, transparency, and auditability.
• Develop solutions to a high standard that are maintainable, testable, and aligned to acceptance criteria, with a strong emphasis on traceability and deterministic behaviour in regulated environments.
• Leverage AI tools responsibly across the software development lifecycle (e.g. code generation, testing, documentation), ensuring outputs are reviewed, validated, and compliant with engineering standards.
• Communicate effectively with team members, contribute ideas, and stay current with emerging technologies and modern engineering practices.
• Ensure delivered systems are production‑ready, secure, and well‑documented, supporting operational handover and ongoing audit requirements.
• Follow coding standards and defined development processes, ensuring consistency, quality, and compliance across all deliverables.
• Resolve third line support issues in a professional and timely manner, applying a structured and analytical approach to problem solving.

• Ensuring compliance with the company’s regulatory requirements under the FCA, NFA, AMF, AFM, MAS.
• Adhe…