Full-Stack Engineer, Generative AI @Marsh Tech

Company:

Marsh

Description:

We are seeking an experienced Senior Full-Stack Engineer, Generative AI to design, build, and operate enterprise-grade AI-enabled solutions across our technology organization. This role is for a senior individual contributor who combines strong hands-on engineering skills with sound technical judgment and the ability to raise the quality of delivery within a team or domain. This role will be based in Cluj and has a requirement of working at least three days a week in the office.

You will work on complex, real-world problems, developing AI-enabled web applications across the full stack using modern frontend and backend technologies, Large Language Models (LLMs), and cloud infrastructure. You will play a key role in evolving solutions from early proof of concept through to scalable, production-ready systems used by internal stakeholders.

In this role, you are relied upon to ensure solutions meet enterprise standards for security, reliability, scalability, maintainability, and testability, and to help teams apply generative AI responsibly and effectively in production environments.

We will count on you to:

- Lead the technical design and delivery of complex, AI-enabled features or services.

- Design, build, and evolve full-stack applications using modern frontend and backend frameworks.

- Build and maintain robust, high-performance APIs using NestJS / NodeJS or FastAPI / Python.

- Integrate Large Language Model (LLM) capabilities into production systems, selecting appropriate patterns, tools, and architectures.

- Guide the evolution of proofs of concept into production-ready, scalable solutions within enterprise constraints.

- Own technical solutions end-to-end, including design, implementation, deployment, and operational readiness.

- Make sound engineering decisions that balance security, scalability, reliability, maintainability, and testability.

- Act as a hands-on engineer: write production code, review code, and contribute to testing and observability.

- Champion strong engineering practices, including code quality, testing, CI/CD, and documentation.

- Identify opportunities for reuse and contribute to shared components, patterns, and standards.

- Collaborate closely with product, architecture, security, and platform teams in an Agile delivery environment.

- Provide technical guidance and mentorship to other engineers through design discussions and example.

- Contribute to continuous improvement of engineering practices within the team or domain.

What can you expect?

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 marsh.com, or follow us on LinkedIn and X.

Marsh is committed to creating a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age, background, disability, ethnic origin, family duties, gender orientation or expression, 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.

Marsh 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.