Software Developer - Prime Services in Belfast

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. The Software Development function creates and maintains applications, frameworks and other software components to deliver to business requirements.

As a Full‑stack Software Engineer specializing in both front‑end and back‑end development, experienced in React or C# .NET, you will be a key member of our Prime Services Software Development team, contributing to the creation and enhancement of secure, responsive web applications and services tailored for front‑to‑back trading technology. Your coding expertise, alignment to agile principles, and your strong emphasis on quality will be instrumental in delivering robust and reliable applications, including greenfield, re‑platforming and migration to (AWS) cloud.

In this role, you will also work closely with the platform engineering team to ensure seamless integration and deployment, and QA to deliver an automation‑first and shift‑left approach to quality control. You will support and advocate for the Marex Agentic AI augmented development strategy, and also be encouraged to join Marex technology guilds, participate in solution design and technology reviews, and to act as scrum master when needed.

• Code across all proprietary applications and services that constitute the Marex Prime Services (Capital Markets) technology platform.
• Take accountability for the quality of your deliverables, take an automation first approach to quality control, adhere to coding standards and participate in peer reviews and pull requests.
• Work with platform engineering to automate build and deploy of existing and new systems.
• Align with Marex delivery process and agile principles, engage in scrum ceremonies and contribute to estimation and scheduling, and resolving impediments.
• Work collaboratively within scrum team, and more widely within the technology function.

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

• Engineering: C#, .Net 4.8, ASP.Net, React, JS/TS, HTML, CSS, SQL
• Tools / Technologies / Infra: NodeJS, cloud/AWS, Bitbucket (Git), SQL/Server, Jira
• Design: API, HTTP/REST, JSON, micro‑services and distributed systems
• SDLC: Agile, Scrum, Kanban, devOps, CI/CD. Understanding of, and advocacy for, Agentic AI / Context Engineering

• Engineering: Java, Vue, Angular, .Net Core, Kendo UI
• Tools / Technologies / Infra: Docker, Kubernetes, RabbitMQ, Kafka, Azure, GCP, NoSQL, DNS, NServiceBus, IIS
• Design: Serverless, cloud‑native/PaaS, event driven, pub/sub, real‑time/websockets, architectural design records (ADRs)
• SDLC: Agentic AI / Context Engineering; CoPilot, Claude, Codex, building custom agents across full SDLC
• Financial Services Ecosystem: Market data, Bloomberg. Experience working in a regulated environment and knowledge of the risk and compliance requirements associated with this.

• 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.

• 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.

• 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.
• 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.
• Nurture talent – we aim to grow our own talent and make Marex the place ambitious, hardworking and talented people choose to build their career.
• Adaptable and Nimble – Our size and flexibility is an advantage.

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.