Lead Software Engineer, Team Lead

We are seeking a talented individual to join our Client Analytics & Technology (CAT) team at Mercer a Marsh business. This role will be based in London. This is a hybrid role that has a requirement of working at least two days a week in the office.

The CAT team builds and runs internal and client-facing analytics and technology products across Mercer businesses. You will be the hands-on Tech Lead for a small UK-based team working closely with an India engineering pod owning technical direction delivery and day-to-day engineering leadership. The role requires strong domain partnership (risk advisory / consulting stakeholders) alongside pragmatic software engineering and architecture judgment.

We will count on you to:

• Lead end-to-end delivery of CAT products (e.g. Concierge an agentic AI workflow tool Prism a Mercer knowledge fabric for scheme data and similar initiatives) from problem framing and design through build release and support.

• Translate risk advisory / consulting needs into clear technical requirements user stories and solution designs; partner with stakeholders through UAT and rollout.

• Own the backend and integration approach (APIs data flows security RBAC) and ensure solutions are scalable maintainable and well documented

• Provide technical leadership for a distributed team (London India): sprint planning input code reviews mentoring and raising engineering standards.

• Drive quality and operational readiness: testing strategy CI/CD release notes production deployment governance and incident/root-cause management.

• Identify and deliver pragmatic AI/ML opportunities where valuable (e.g. agentic workflows RAG/LLM-enabled capabilities) with appropriate governance and human-in-the-loop controls.

What you need to have:

• Experience managing a team as this role involves leading a team of 5 as well as contributing hands-on coding work.

• Proven experience as a Tech Lead / Lead Engineer delivering production software including hands-on coding and code review ownership.

• Strong backend engineering skills (API design data modelling performance) and experience building secure role-based applications.

• Experience working directly with business stakeholders in a financial firm with the ability to explain technical tradeoffs clearly.

• Demonstrated ability to lead delivery with an agile team across time zones (e.g. sprint ceremonies prioritization support and team coordination).

What makes you stand out

• Prior experience in UK pensions covenant / advisory / trustee-facing tools and strong ability to connect technical design to covenant outcomes.

• Experience with Python-based services (e.g. FastAPI) and modern web stacks (e.g. in real-world delivery.

• Practical experience delivering GenAI/agentic solutions (prompt engineering RAG governance patterns) in production or controlled enterprise environments.

• Worked with data pipelines / SQL databases / Mongo databases or Document storages.

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.