We are seeking a Senior Full-stack Engineer to join our team in Cluj-Napoca. You will help design and build modern digital products and agentic AI solutions, working closely with colleagues in Romania, Ireland and across Marsh. This is a hands-on role for someone who enjoys fast-paced delivery, rapid prototyping, and turning emerging ideas into practical solutions that deliver real business value.
Depending on experience, the role may be aligned to Engineer or Senior Engineer level.
We will count on you to:
- Design, prototype, and build digital products and agentic AI solutions for clients and colleagues.
- Work closely with teams in Cluj, Dublin, and across the wider business to turn ideas into usable products.
- Move quickly from concept to proof of concept, learn from user feedback, and iterate rapidly.
- Contribute across the full delivery lifecycle in an Agile team, from design and development through deployment and support.
- Help define and improve engineering standards, including prompt engineering, testing, reuse, documentation, and maintainability.
- Share lessons learned, adapt quickly, and contribute to a culture of continuous improvement.
- Stay current with developments in full stack engineering, LLMs, and agent-based AI systems.
What you need to have:
- Strong written and verbal communication skills in English.
- Proven experience in full stack development, ideally 5+ years, with scope aligned to your level.
- Strong experience with Java and Spring Boot.
- Experience with a modern front-end framework like Angular; React also welcome.
- Experience with PostgreSQL, familiarity with MongoDB or other NoSQL databases.
- Strong understanding of RESTful APIs and service integration.
- Hands-on experience with LLMs, prompt engineering, or AI-assisted development tools.
- A creative, problem-solving mindset and a collaborative approach.
What makes you stand out:
- Experience building or integrating AI agents, orchestration frameworks, or LLM APIs.
- Experience with testing, CI/CD, monitoring, and production support.
- Awareness of security, privacy, and responsible AI considerations.
- Experience mentoring others or helping define technical standards.
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 (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.
Skills Required
- Strong written and verbal communication skills in English
- 5+ years of full-stack development experience, depending on role level
- Strong experience with Java and Spring Boot
- Experience with a modern front-end framework such as Angular; React is also welcomed
- Experience with PostgreSQL and familiarity with MongoDB or other NoSQL databases
- Strong understanding of RESTful APIs and service integration
- Hands-on experience with LLMs, prompt engineering, or AI-assisted development tools
- Creative problem-solving mindset and collaborative approach
- Experience building or integrating AI agents, orchestration frameworks, or LLM APIs
- Experience with testing, CI/CD, monitoring, and production support
- Awareness of security, privacy, and responsible AI considerations
- Experience mentoring others or helping define technical standards
Marsh McLennan Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Marsh McLennan and has not been reviewed or approved by Marsh McLennan.
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Leave & Time Off Breadth — Leave offerings are described as generous, including sizable PTO, paid holidays, paid sick days, and additional time off such as paid volunteer time and “Summer days.” These time-off benefits are portrayed as a standout part of the overall rewards package.
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Healthcare Strength — Healthcare coverage is characterized as comprehensive, spanning medical, dental, and vision options, with additional supports like disability and life insurance and access to mental health resources and an EAP. The breadth of plan options is positioned as a core strength of the benefits package.
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Retirement Support — Retirement benefits are framed as solid, with 401(k) programs and employer matching frequently highlighted alongside other financial programs. Stock purchase options are also referenced as an additional wealth-building component of the total rewards mix.
Marsh McLennan Insights
What We Do
Marsh McLennan (NYSE: MMC) brings together nearly 78,000 experts in risk, strategy, and people across Marsh, Guy Carpenter, Mercer, and Oliver Wyman, serving clients in over 130 countries. Marsh enables enterprise worldwide by helping clients manage risks, transforming uncertainty into opportunity. Guy Carpenter helps clients grow profitably with reinsurance broking expertise, advisory services, and advanced analytics. Mercer helps organizations advance the health, wealth, and careers of their most vital asset — their people. Oliver Wyman’s expertise in strategy, operations, risk, and organization transformation changes what is possible for our clients, their industries, and society. Together, we combine a unique range of capabilities to help our clients solve problems, seize opportunities, and build lasting success in increasingly complex operating environments.
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