Software Developer - Derivatives in London

About Marex

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 2,300 employees across Europe, Asia and the Americas.

Department description

The Technology Department delivers differentiation, scalability and security for the business. Reporting to the COO, 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.

Role Summary

As a software developer, you will join the ETD Operations Technology team supporting systems used in the operational processing of Exchange-Traded Derivatives (ETD), including futures and options traded on global exchanges. The role focuses on maintaining and enhancing applications that support post-trade operational workflows, including deliveries processing, segregation movements, commission and fee changes, and operational adjustments. These systems ensure that exchange-traded activity is accurately reflected across internal platforms and client accounts. The work is highly data-driven and operationally critical, involving the processing and validation of high-integrity transactional and position data such as balances, margin outputs, cash movements, and fee calculations. Accuracy, traceability, and consistency are essential, as issues can lead to reconciliation breaks, operational risk, or regulatory scrutiny. The developer will work closely with operations stakeholders, business analysts, QA, and other technology teams to deliver reliable solutions that support daily operational processes aligned with exchange and clearing timelines.

Responsibilities

• Design, code and test all components of modern web applications.
• Contribute to the overall architecture and design of the technology created/maintained by the development delivery team.
• Develop solutions to a high standard that is maintainable, testable and meets the requirement's acceptance criteria.
• Adhere to development best practices and processes.
• Communicate with team members, introduce ideas and keep abreast of the latest technologies.
• Liaise with business users to gather application requirements.
• Ensure delivered systems are of production quality. Ensure software is adequately documented for handover to the business.
• Follow coding standards and defined development process.
• Resolve third line support issues in a professional and timely manner.
• Ensuring compliance with the company's regulatory requirements under the SEC, FINRA, NFA, CFTC and other applicable exchanges.
• Adhere to the operational risk framework for your role ensuring that all regulatory or company determined parameters are complied with.
• Role model for demonstrating highest level standards of integrity and conduct and reflecting Company Values, at all times complying with Marex's Code of Conduct.
• To ensure that you are fully aware of and adhere to internal policies that relate to you, your role or any other activities for which you have any level of responsibility.
• To report any breaches of policy to Compliance and/or your supervisor as required.
• To elevate risk events immediately.
• To provide input to risk management processes, as required.

All staff:

• Ensure compliance with the company's regulatory requirements under the FCA.
• Adhere to the operational risk framework for your role ensuring that all regulatory or company determined parameters are complied with.
• Role model for demonstrating highest level standards of integrity and conduct and reflecting Company Values.
• At all times comply with the FCA's Code of Conduct.
• Ensure that you are fully aware of and adhere to internal policies that relate to you, your role or any other activities for which you have any level of responsibility.
• Report any breaches of policy to Compliance and/or your supervisor as required.
• Escalate risk events immediately.
• Provide input to risk management processes, as required.

Competencies:

• Excellent verbal and written communication skills.
• A collaborative team player, approachable, self-efficient and influences a positive work environment.
• Demonstrates curiosity.
• Resilient in a challenging, fast-paced environment.
• Ability to take a high level of responsibility in a fast pace and high-volume environment.
• Excels at building relationships, networking and influencing others.

Skills and Experience:

Essential

• Experienced in C# .NET.
• Experience with Docker / Knowledge of containers.
• Experience of NoSQL or RDMS databases.
• Infrastructure as Code, Terraform or equivalent.
• Modern CI/CD and DevOps practices.
• Cloud technology, ideally AWS (Amazon Web Services).
• Knowledge of BDD/TDD.
• Agile and scrum development methodologies.
• Methodical approach to software architecture and design and experience employing the right design choices for a given project.
• Excellent verbal and written communication skills.

Desirable:

• Experience working in a regulated environment and knowledge of the risk and compliance requirements associated with this.
• Experience with modern frontend frameworks, ideally React, though Angular, Vue, or similar frameworks are also welcome.
• Exposure to JavaScript and/or TypeScript in a frontend or full-stack context.
• Experience with Node.js and/or GraphQL.
• Exchange-Traded Derivatives (ETD) operations or post-trade systems, including:

• Processing of positions, balances, and operational adjustments.
• Deliveries processing and settlement workflows.
• Segregation movements and client money processing.
• Commission and fee calculations.
• Reconciliation processes and operational exception handling.
• Integration with internal and external trading or clearing data sources.

Conduct Rules

• Act with integrity.
• Act with due skill, care and diligence.
• Be open and cooperative with the FCA, the PRA and other regulators.
• Pay due regard to the interests of customers and treat them fairly.
• Observe proper standard of market conduct.
• Act to deliver good outcomes for retail customers.

Company Values

• Respect - Clients are at the heart of our business, with superior execution and superb client service the foundation of the firm. We respect our clients and always treat them fairly.
• Integrity - Doing business the right way is the only way. We hold ourselves to a high ethical standard in everything we do – our clients expect this and we demand it of ourselves.
• Collaborative - We work in teams - open and direct communication and the willingness to work hard and collaboratively are the basis for effective teamwork. Working well with others is necessary for us to succeed at what we do.
• Developing our People - Our people are the basis of our competitive advantage. We look to "grow our own" and make Marex the place ambitious, hardworking, talented people choose to build their careers.
• Adaptable and Nimble - Our size and flexibility is an advantage. We are big enough to support our client's various needs, and adaptable and nimble enough to respond quickly to changing conditions or requirements. A non-bureaucratic, but well controlled environment fosters initiative as well as employee satisfaction.

Marex is fully committed to being an inclusive employer and providing an inclusive and accessible recruitment process for all. We will provide reasonable adjustments to remove any disadvantage to you being considered for this role. We value the differences that a diverse workforce brings to the company. We welcome applications from candidates returning to the workforce. Also, Marex is committed to avoiding circumstances in which the appearance or possibility of conflicts of interest may exist within the hiring process. If you would like to receive any information in a different way or would like us to do anything differently to help you, please include it in your application.