Senior AI Full-Stack Developer

Marsh & McLennan Companies; United States; Remote; USD 80,000 - 120,000; Full time

Job summary

A leading firm in risk and strategy is seeking a Senior AI Full-Stack Developer to join its innovation team based in Cluj. This role demands minimum 5 years experience, focusing on frontend frameworks, NodeJS, and Agile methodologies. Join a vibrant tech hub fostering innovation and collaboration among teams across Europe.

Benefits

Professional development opportunities

30+ days off

Performance Bonus scheme

Core benefits - Pension, Life and Medical Insurance

Flexible benefits package

Charity contributions and days off

Qualifications

• Experience contributing to rapidly evolving fields.
• Ability to engage in Agile collaborative environments.
• Proven problem-solving skills and creativity.

Responsibilities

• Design, develop, and maintain web applications.
• Operationalize prototypes and ensure seamless handover.
• Contribute to a dynamic, start-up-like culture.

Skills

Proficiency in modern frontend framework (React, Vue, Angular)

Hands-on experience with NestJS / NodeJS

Experience with Python

Strong comprehension of RESTful APIs

Knowledge of Large Language Models (LLMs)

Familiarity with prompt engineering techniques

Understanding of Retrieval-Augmented Generation (RAG)

Excellent communication skills in English and Romanian

Education

Minimum 5 years of relevant experience

Tools

Kubernetes

MongoDB

Job description

Company:MMC Corporate

Description: Marsh McLennan (MMC)has established its EMEA Technology Hub in Cluj, Romania, reflecting our commitment to innovation and excellence. This hub is central to our digital strategy, addressing emerging challenges and enhancing service delivery through advanced technology solutions that empower our clients and promote sustainable growth. We are currently seeking a highly skilled and motivatedSenior AI Full-Stack Developerto join ourInnovation Team. In this role, you will play a vital part in designing, developing, and maintaining state-of-the-art web applications. You will work with a diverse group of talented professionals in a dynamic, start-up-like environment, helping to shape the future of digital solutions. This position will be based in Cluj-Napoca, Romania. We will count on you to:

• Contribute early to a rapidly evolving field with strong executive backing.
• Experience the excitement of a start-up culture while being backed by a global pioneer in the industry.
• Engage in thrilling initiatives like Hackathons and connect with the broader MMC Tech ecosystem.
• Be part of our strategic tech hub that delivers innovative digital solutions for clients and colleagues alike.
• Embrace a fast-paced, experimental approach with a focus on rapid iteration and a willingness to pivot quickly—adopt a proof-of-concept mindset to drive innovation and efficiency.
• Be able to learn from failures, adapt quickly, and effectively communicate the lessons learned.
• Engage effectively with our counterparts in the Dublin and Cluj AI teams.
• Operationalise prototypes developed by the Dublin or local AI teams.
• Ensure seamless handover of operationalised prototypes to business technology teams.
• Thrive as a collaborative developer in an Agile environment.
• Embrace a lifelong learning mindset, continuously seeking opportunities for improvement.
• Establish and maintain best practice development frameworks and standards, such as Prompt Engineering.
• Develop practices and guidelines to improve consistency and reuse of solutions.

What you need to have:

• Minimum 5 years of relevant experience.
• Proficiency in a modern frontend framework, ideally React (Vue or Angular are also great).
• Hands-on experience with NestJS / NodeJS or a similar technology stack.
• Experience with or knowledge of Python.
• Strong comprehension of RESTful APIs.
• Knowledge of Large Language Models (LLMs).
• Familiarity with prompt engineering techniques.
• Understanding of Retrieval-Augmented Generation (RAG).
• A creative, problem-solving mindset that drives your work.
• Excellent communication skills in both English and Romanian.

What makes you stand out?

• Practical experience with Kubernetes and MongoDB.
• Knowledge of deployments and infrastructure.

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 an 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;
• A yearly budget and the opportunity to build your flexible benefits package (up to 20% of your annual salary);
• 30+ days off (25 legal days off, 1 extra day off on your birthday, public holiday replacement days, extra buy/sell from your benefits budget);
• Performance Bonus scheme;
• Matching charity contributions, charity days off, and the Pay it Forward charity challenge;
• Core benefits - Pension, Life and Medical Insurance, Meal Vouchers, Travel Insurance;

Marsh McLennan (NYSE: MMC) is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue of $24 billion and more than 90,000 colleagues, Marsh McLennan helps build the confidence to thrive through the power of perspective. For more information, visit marshmclennan.com, or follow on LinkedIn and X. Marsh McLennan 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 McLennan 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 McLennan 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.