Application Support Engineer
Posted 9 Oct 2026
Advertised as “Senior Application Support Engineer (Full-Stack JavaScript) @Marsh Tech”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 5+ yrs
- Management level
- Individual contributor
- Employment
- Hybrid
No salary listed for this role.
We are seeking a talented individual to join our Marsh Re IT Product Support team at Marsh. This role will be based in Cluj-Napoca, Romania. This is a hybrid role that has a requirement of working at least three days a week in the office.
The successful candidate will support the stability, availability, and performance of our full-stack applications in production. Working closely with development, testing, operations, and business teams, this person will play an important role in incident resolution, service reliability, and the ongoing modernization of our technology landscape.
We will count on you to:
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Support and maintain full-stack applications built on the MERN ( MongoDB, Express.js, React, Node) stack in a production environment.
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Monitor production systems, identify issues or bottlenecks, and coordinate timely resolution with the relevant teams.
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Investigate and troubleshoot production incidents, including root cause analysis and follow-up actions to prevent recurrence.
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Develop and maintain documentation such as runbooks, standard operating procedures, and knowledge base articles.
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Apply best practices for incident, problem, and change management to support a stable production environment.
What you need to have:
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5 years+ experience supporting full-stack applications (Angular &Node.js or React & Node.js) in a production environment.
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5 years+ experience with MongoDB or Express
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Experience supporting enterprise cloud solutions.
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Excellent communication and interpersonal skills.
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Knowledge of DevOps practices and tools, ITIL processes, and hands-on experience with ServiceNow.
What can you expect?
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Join a talented delivery team within an industry-leading organization.
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Play a key role in technical modernization initiatives.
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Enjoy high visibility and strong engagement with senior business leadership.
What makes you stand out?
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Experience with another JavaScript framework, and relational or NoSQL databases such as MSSQL, PostgreSQL,
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Experience supporting microservices architectures, APIs, and application integration solutions.