Software Developer - Clearing Technology

Marex Group; Greater London; On-site; GBP 60,000 - 80,000; Full time

Job summary

Marex Group is looking for a Software Developer specializing in C# .NET to enhance clearing technology with an AI-first approach. This role in London focuses on creating modern web-based platforms that prioritize security and compliance.

The ideal candidate will leverage modern AI tools to improve code quality and accelerate delivery while working within a regulated environment. A strong understanding of financial products and collaborative skills are essential for this position.

Qualifications

• Experience in a regulated environment and knowledge of financial markets.
• Ability to build relationships and network effectively.

Responsibilities

• Design, develop, and test secure web-based post-trade platforms.
• Contribute to technology solutions architecture and design.
• Ensure systems are production-ready and compliant with audit standards.

Skills

AI-assisted development tools

C# .NET

Cloud technology (AWS)

DevOps practices

Agile and scrum methodologies

Strong communication skills

Financial product knowledge

Tools

Terraform

NoSQL or RDMS databases

Job description

Software Developer - Clearing Technology

Location: London, GB

Job type: Full-Time

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.

Responsibilities

• 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.

Essential skills and experience

• Experience leveraging AI-assisted development tools (e.g. code generation, automated testing, developer productivity tooling) to improve delivery speed and quality.
• Strong understanding of applying AI responsibly within the software development lifecycle, ensuring traceability, auditability, and control.
• 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.
• Understanding of financial products across derivatives, FX, commodities, cash equities or fixed income.
• Good knowledge of the post‑trade lifecycle, including confirmation/affirmation, allocations, settlement, clearing, collateral and margin, lifecycle events, reconciliations, and exceptions management.
• Exposure to embedding AI capabilities into end‑user applications (e.g. intelligent workflows, automation, or decision support).
• Experience of SOLID.
• Experience of Domain Driven Design.
• Experience working in a regulated environment and knowledge of the financial markets.
• A collaborative team player, approachable, self‑efficient, and able to foster a positive engineering culture, including adoption of AI‑first practices.
• Demonstrates curiosity, particularly in emerging technologies, AI capabilities, and continuous improvement of development practices.
• Resilient in a challenging, fast‑paced, and regulated environment.
• Excels at building relationships, networking, and influencing others across both technical and business teams.
• Strategic collaborator with insight and agility, able to anticipate future challenges, including those related to scale, regulation, and technology evolution, ensuring operational effectiveness.

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.

Company Values

• Be collaborative – by working together across the organisation, we foster teamwork, can better respond to challenges and successfully deliver for our clients.
• Act with integrity – we pride ourselves on our honesty and high ethical standards. We apply these values when working with all our clients, colleagues and other stakeholders.
• Be adaptable and entrepreneurial – we embrace change as markets evolve to constantly increase our efficiency and create innovative solutions for our clients.
• Be respectful – how we treat each other, and our clients says everything about who we are. We always act respectfully and treat people fairly in everything we do.
• Nurture talent – we aim to grow our own talent and make Marex the place ambitious, hardworking and talented people choose to build their career. This means giving and taking stretch opportunities, taking risks, and committing to career development and support – for ourselves and our teams.
• 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.