LeadAIEngineer

## Company: Marsh ## ## Description: **_What can you expect?_** Mercer Marsh Benefits (MMB) is a leading global consultancy that specializes in employee benefits, workplace wellness, and health insurance. MMB is seeking to appoint a hands-on, full-stack Lead AI Engineer to deliver a strategically key AI-first software product. The Lead AI Engineer is a senior role combining solution architecture and engineering. The role designs and delivers high‑quality features using AI and enables teams to use AI tooling effectively and responsibly. The Lead AI Engineer provides architectural leadership, oversees design quality, and builds production-ready solutions, balancing strategic thinking with AI enabled hands-on delivery. **_We will count on you to:_** * Design end-to-end solutions aligned with business goals, architectural standards, security and reliability requirements, and operational needs. * Build and deliver business value, using AI-enabled tools to improve speed, quality, and consistency. * Guide and support teams adopting AI-assisted delivery approaches, providing practical patterns and guardrails. * Lead small, cross-functional delivery teams, set technical direction, and mentor senior engineers. * Make sound technical decisions in complex or ambiguous environments, identifying trade-offs and improvement opportunities. * Own cross‑functional coordination across dev, product, business, security, data and platform teams. **_What you need to have:_****__** * Senior experience in solution architecture and hands-on engineering roles for key software applications, particularly SaaS. * Strong experience of AI-first applications and agentic technologies. * Strong proficiency with AI-enabled development and productivity tools. * Practical experience embedding AI/LLMs into the SDLC (prompt engineering, LLM‑assisted development, automated model tests and model CI/CD). * Proven ability to design and deliver complex solutions end to end. * Demonstrated leadership of small en