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Salary
≈ $78k – $192k per year (Estimated)
Location
Hybrid (London, United Kingdom)
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 23, 2026. First seen by Alion on Jun 19, 2026. Marsh McLennan scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Marsh McLennan is a global professional services firm in risk, strategy and people, headquartered in New York and listed on the New York Stock Exchange. It operates through four businesses, Marsh in insurance broking, Guy Carpenter in reinsurance, Mercer in health, wealth and benefits consulting and Oliver Wyman in management consulting, with about 90,000 colleagues in some 130 countries. It hires catastrophe risk analysts, reinsurance brokers, benefits consultants, sales executives, paralegals, software engineers and IT support staff in hubs such as London, Cluj-Napoca and Mexico City.

Company:

Mercer

Description:

Mercer is seeking candidates for the following position based in the London office:

Applications Developer

What can you expect?

This is a hands-on technical role focused on improving the robustness, stability, and performance of our technology systems. You will work across the technology platform, with an initial focus on data pipelines, helping to redesign and enhance data processes to make them more fault tolerant, scalable, and efficient. The role offers broad exposure to investment management data, systems, and the wider business.

We will count on you to:

  • Work closely with the Head of Production and support teams to identify areas for improvement

  • Learn our technology architecture and systems, with a focus on trading systems and the data lake used for regulatory reporting

  • Collaborate with the broader Engineering team to understand practices and architecture

  • Perform technical analysis to identify root causes of issues

  • Design and implement technical changes and improvements

  • Take part in coding and code reviews

  • Work closely with business teams as needed

What you need to have:

  • BSc or MSc in a financial, technological, mathematical, or scientific discipline, with a strong analytical foundation

  • Current experience with C# and Python and a passion for software development

  • Strong SQL skills

  • Experience in designing robust data flows and systems

  • Strong, clear, and concise communication skills, both verbal and written

  • A strong sense of responsibility and commitment to quality

  • Self-driven, motivated work ethic

  • Energetic and enthusiastic personality

What makes you stand out:

  • IMC or another investment management qualification

  • Experience with Apache Airflow

  • Experience with Databricks

  • Experience with asset management data

  • Passion for design and architecture

Why join our team:

  • We help you be your best through professional development opportunities, interesting work and supportive leaders

  • We foster a vibrant and inclusive culture where you can work with talented colleagues to create new solutions and have impact for colleagues, clients and communities

  • Our scale enables us to provide a range of career opportunities, as well as benefits and rewards to enhance your well-being

Marsh (NYSE: MRSH) is a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of over $27 billion and more than 95,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit corporate.marsh.com, or follow us on LinkedIn and X.Marsh is committed to embracing a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age background, civil partnership status, disability, ethnic origin, family duties, gender orientation or expression, gender reassignment, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, or any other characteristic protected by applicable law. We are an equal opportunities employer. We are committed to providing reasonable adjustments in accordance with applicable law to any candidate with a disability to allow them to fully participate in the recruitment process. If you have a disability that may require reasonable adjustments, please contact us at [email protected] is committed to hybrid work, which includes the flexibility of working remotely and the collaboration, connections and professional development benefits of working together in the office. All Marsh colleagues are expected to be in their local office or working onsite with clients at least three days per week. Office-based teams will identify at least one “anchor day” per week on which their full team will be together in person.
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