London, GB,

Information Technology,

Full-Time

For more information visit https://www.marex.com/

Job Reference: VN2582

Overview of Marex / Department description
Marex has unique access across markets with significant share globally both on and off exchange. The depth of knowledge amongst its teams and divisions provides its customers with clear advantage, and its technology-led service provides access to all major exchanges, order-flow management via screen, voice and DMA, plus award-winning data, insights and analytics.

Role Summary
We are seeking a senior Software Engineer to provide technical leadership, architectural authority, and hands-on delivery across our Equity Market Making Trading platform.
This is a high-impact, regulated environment with distributed systems and DevOps practices. The role is designed for a senior engineer with leadership skills.

Languages & Frameworks: C#, .NET (Framework & Core), ASP.NET Core, RESTful APIs, Microservices, Messaging (AMQ, Kafka, RabbitMQ), SQL Server, JavaScript (desirable). WPF (desirable)

O/S, Cloud & DevOps: Windows and Linux experience, AWS (Lambda, ECS, RDS, SQS, S3, API Gateway, VPC, Terraform/CloudFormation), CI/CD (TeamCity/Octopus), Git workflows, Containers
AI & Developer Productivity: Experience using AI-assisted coding tools, including agentic AI platforms, for code generation, review, automation, and optimization.
Regulatory Experience: Highly desirable in financial services or other regulated environments.

Responsibilities

Role specific:

Architectural Leadership

• Own and evolve platform architecture across on-premise and AWS cloud environments.
  
• Lead modernization initiatives: microservices, distributed systems, cloud-native practices.
• Ensure scalability, resilience, performance, and security-by-design.
• Guide technical governance and engineering standards.

Software Engineering Excellence

• Deliver high-quality, maintainable, and secure systems.
• Implement modern DevOps practices: CI/CD, automation, IaC.
• Promote coding standards, testing, code review discipline, and quality metrics.
• Lead technical delivery of complex initiatives, contributing hands-on where strategic.
• Leverage AI-assisted coding tools, including agentic AI, to accelerate development, enforce quality, and optimize software delivery.

Technical Leadership & Mentorship

• Act as the senior technical authority within engineering.
• Mentor senior and mid-level engineers, raising technical capability.
• Lead complex problem-solving and critical incident resolution.
• Support hiring, technical evaluation, and team development.

Operational & Delivery Accountability

• Maintain platform reliability, scalability, and operational stability.
• Own root cause analysis and remediation planning for incidents.
• Drive/engage in best practise project governance, e.g. Agile to deliver results and manage expectations
• Embed observability, monitoring, and performance metrics.
• Collaborate with operations, compliance, and product teams to deliver business change safely.

Strategic & Commercial Contribution

• Contribute to the technology roadmap and long-term engineering strategy.
• Participate in governance forums, board reporting, and vendor selection.
• Communicate technical direction to senior stakeholders effectively.

All staff:

• Ensure compliance with the companys 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 FCAs 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, Skills and Experience

Competencies:

• Technical authority and credibility with senior engineers.
• Strong communication and stakeholder influence.
• Calm, structured under pressure.
• Commercially aware and strategic-thinking.
• Motivated to grow into a more senior Software Engineering role.

Skills and Experience:
Essential:

• 10+ years in software engineering *
• Proven track record designing and delivering scalable, distributed systems.
• Architectural ownership of complex platforms.
• Mentoring and leading engineering teams.
• Experienced in AI-assisted development workflows.
• Experience of Capital Markets, especially Equity trading, FIX experience, market data and Trading UIs, is beneficial.
• Cloud-native and DevOps expertise.
• Exposure to regulated environments preferred.
• Leadership potential with ability to assume Head of Software Architecture responsibilities.

Desirable:

• Influence enterprise-scale regulated platforms.
• Hands-on and strategic leadership.
• Exposure to roadmap planning, governance forums, and operational oversight.
• Modern AI-assisted software engineering across the tech estate.

Conduct Rules

You must:

• 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

*Applications outside of this range will also be considered

Company Values

Acting as a role model for the values of the Company:

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 clients 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.

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