Market Data Engineer

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 company offers comprehensive coverage across four core services: clearing, agency and execution, market making, and hedging and investment solutions.

With access to 60 exchanges and a presence in over 40 offices worldwide, Marex serves some of the largest commodity producers, consumers, traders, banks, hedge funds and asset managers.

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

• Job Reference
• Overview Of Marex / Department Description

The Technology Department delivers secure, scalable digital tools, software services, and infrastructure across all business units.

Agile development teams align with specific business areas while other teams handle enterprise-wide IT operations, support, security, and architecture.

The Data & AI team drives productivity, compliance, and insights by leveraging a robust Data Lakehouse, decentralizing data access, improving client experiences, promoting data‑driven practices, and ensuring efficient, auditable use of data in line with commercial terms.

Role Summary

• Architect and develop enhancements to the Security Master Platform, improving data quality, processing speed, and scalability at enterprise scale.
• Design and implement robust ETL pipelines to extract, transform, and load reference data from the Bloomberg Data License or alternate vendor APIs and/or file feeds.
• Build extensible frameworks to onboard new market data vendors and alternative reference data sources as business requirements evolve.
• Write, optimise, and maintain complex, high‑performance SQL queries, stored procedures, and schemas tailored for large‑scale financial datasets.
• Develop and maintain RESTful services using C#, . NET Core/. NET 8+, and Minimal APIs, following modern secure development practices.
• Provide day‑to‑day operational support to ensure seamless execution of daily data loads, batch processing, and data distribution.
• Monitor the platform proactively, troubleshoot data discrepancies, and rapidly resolve production issues to minimise downstream impact on trading and risk systems.
• Implement automated data validation rules and monitoring alerts to safeguard the accuracy and completeness of Security Master data.
• Develop usage‑tracking capabilities across downstream data consumers to identify and eliminate unused feeds and data duplication, supporting commercial and cost optimisation.
• Deploy and support applications on AWS (EC2, IAM, S3, Redis) using containerised, cloud‑native design principles.
• Build and maintain CI/CD pipelines for automated build, test, and deployment of platform enhancements.
• Act as a technical bridge between the Market Data Engineering team, downstream consumers (trading, risk, compliance), and external vendors.
• All Staff Responsibilities
• Ensuring compliance with the company’s regulatory requirements under the FCA.
• Adhering to the operational risk framework for your role, ensuring all regulatory or company‑determined parameters are complied with.
• Role modelling the highest level standards of integrity and conduct, reflecting Company Values.
• Complying with the FCA’s Code of Conduct at all times.
• Being fully aware of and adhering to internal policies that relate to you, your role, or any other activities for which you have any level of responsibility.
• Reporting any breaches of policy to Compliance or your supervisor as required.
• Escalating risk events immediately.
• Providing input to risk management processes, as required.
• Competencies, Skills And Experience
• Core Competencies
• Excellent verbal and written communication skills.
• A collaborative team player, approachable, self‑efficient and able to influence a positive work environment.
• Exceptional analytical skills, with the ability to debug complex data lineage issues under time‑sensitive constraints.
• Resilient and adaptable, comfortable balancing structured development work with fast‑paced operational demands.
• Ability to take a high level of responsibility in a fast‑paced and high‑volume environment.
• Excels at building relationships, networking and influencing others across technical and business teams.

Essential

• Strong commercial experience developing enterprise applications using C# and . NET Core/. NET 8+.
• Experience building and maintaining RESTful services using Minimal APIs and modern .

NET practices, including async programming, dependency injection, and API performance optimisation.

• Advanced SQL expertise — writing optimisation queries, managing indexes, stored procedures, functions, and views, and debugging complex transactional logic.
• Strong understanding of query execution plans, indexing strategies, transaction management, and database performance tuning.
• Experience designing scalable relational database schemas for high‑volume financial data platforms.
• Proven experience working with financial reference data and a strong understanding of various asset classes.
• Hands‑on experience with Bloomberg Data License fields, file formats (per‑security requests, bulk files), and FTP/API delivery mechanisms.
• Experience building robust ETL pipelines for ingesting, validating, transforming, and distributing financial market data.
• Experience deploying and supporting applications on AWS, including EC2, IAM, S3, and Redis.
• Experience building and maintaining containerised applications using Docker.
• Experience developing modern web applications using React, with familiarity in Java Script/Type Script and component‑based architecture.
• Experience using Git for source control, and implementing CI/CD pipelines for automated build, test, and deployment.

Desirable

• Familiarity with other market data providers (e. g., LSEG/Refinitiv, S&P, ICE).
• Proficiency in a scripting language to automate file transfers, parsing, system alerts, and operational workflows.
• Experience implementing secure authentication and authorisation mechanisms for enterprise applications.
• Understanding of responsive UI design and state management in front‑end applications.
• Familiarity with infrastructure automation and release management processes.
• 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

Be collaborative – by working together across the organisation, we foster teamwork, respond to challenges, and successfully deliver for our clients.

Act with integrity – we pride ourselves on honesty and high ethical standards and apply these values when working with all our clients, colleagues and stakeholders.

Be adaptable and entrepreneurial – we embrace change and continuously increase efficiency through innovative solutions for our clients.

Be respectful – we treat each other and our clients fairly and respectfully in everything we do.

Nurture talent – we aim to grow our own talent, provide stretch opportunities, and support career development for our teams.

Marex is a fully inclusive employer and provides an accessible recruitment process for all.

We offer reasonable adjustments to remove any disadvantage in the hiring process and welcome applications from candidates returning to the workforce.

Marex also maintains a commitment to avoiding conflicts of interest in 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 let us know in your application.

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