Senior Application Support Engineer (Full-Stack JavaScript)

About the role

We are looking for a Senior Application Support Engineer to join the Marsh Re IT Product Support team in Cluj‑Napoca. The role is hybrid, requiring at least three days per week on‑site, and focuses on maintaining the stability, availability, and performance of our full‑stack applications in production.

Key responsibilities

• Support and maintain full‑stack applications built on the MERN (MongoDB, Express.js, React, Node) stack.
• Monitor production systems, identify bottlenecks, and coordinate timely resolution with development, testing, and operations teams.
• Investigate production incidents, perform root‑cause analysis, and implement preventive actions.
• Create and update runbooks, SOPs, and knowledge‑base articles.
• Apply ITIL best practices for incident, problem, and change management.

Required profile

• 5+ years of experience supporting full‑stack applications (Angular or React with Node.js) in a production environment.
• Strong communication and interpersonal skills.
• Experience with enterprise cloud solutions and micro‑services architectures.

Required skills

• MERN stack (MongoDB, Express.js, React, Node.js)
• Angular (optional)
• ServiceNow
• ITIL processes
• DevOps tools and practices

What we offer

• Professional development opportunities and a supportive leadership team.
• Inclusive culture with flexible benefits up to 20% of annual salary.
• 30+ days off including legal holidays and birthday leave.
• Performance bonus scheme and matching charity contributions.
• Core benefits: pension, life and medical insurance, meal vouchers, travel insurance.