IT Application Support Officer (m/f)

Description de tâches

Date: 1 Jul 2026 Location: Luxembourg, LU Company: Deloitte Luxembourg Job Function: Technology & Cyber Security Seniority: Senior levels Contract Type: Open-term On site Full time

Your future team

Join our IT Application Support team, operating in a hybrid Windows/Linux environment. We provide application support to internal users across the firm, while actively contributing to IT projects and the implementation of new solutions.

The advantages of joining us

Career growth, your way - Access top-notch training and career development, with a clear progression path to help you level up at your own pace. Innovative work that matters - Tackle cutting-edge projects and utilize the latest tech, with all the tools you need to stay ahead. Build your network - Gain access to our global network of professionals and attend industry events to connect and grow your professional circle. Participate in firm-wide IT implementation projects beyond day-to-day support. Be empowered to propose automation and continuous improvement initiatives.

How you'll contribute to our success

Centralise, analyse and document technical issues; produce and maintain procedures and documentation with a rigorous methodology. Provide daily assistance to internal users on transversal applications in a hybrid Windows/Linux environment - handling incidents and service requests for applications running on-premises or in the cloud. Diagnose and resolve application incidents (log analysis, service restarts, configuration files). Prioritise, escalate incidents and coordinate with other IT teams - in accordance with SLA guidelines. Participate in projects to implement new solutions for the firm.

Your skills

• Bachelor's degree in Computer Science or a related field (or equivalent experience)
• Minimum 5 years' experience in an operational IT team (support / production / operations).
• Hands-on experience in application support and troubleshooting (logs, services, configuration).
• Experience supporting applications running on premises and in the cloud.
• Experience working with both Windows and Linux environments.
• Good understanding of ITIL processes (Incident Management, Problem Management, Knowledge Management).
• Curious, flexible, and rigorous, with a strong team spirit and comfortable working independently.
• Proactive, able to drive automation and continuous improvement initiatives.
• Strong attention to detail, stress resilient, and excellent analytical and problem-solving skills.
• Excellent analytical skills and problem solving
• Windows Server administration (including IIS 10 administration and hardening, Windows Services and schedule task, event monitoring).
• Linux / RHEL fundamentals (navigation, system services, logs, permissions).
• Basic SQL knowledge for querying and troubleshooting.
• English and French: mandatory (spoken and written).

Nice to have

• Experience with containerisation tools such as Podman and/or Docker.
• Awareness of CI/CD practices and tools (preferably Azure DevOps).
• Basic knowledge of Microsoft Azure Cloud and awareness of AI-related technologies.
• Scripting skills (PowerShell and/or Bash).
• NGINX fundamentals (basic configuration and troubleshooting).
• Understanding of security standards and best practices.