Application Support System Engineer Service

B2B Freelance contract and CDI both option available
Start Date: 5-10-2026
End Date: 31-12-2027
Type: Onsite
Location: Brussels,Belgium

Key responsibilities

• Assist on day-to-day operational tasks like deploy and update all in-house developed applications in acceptance & production environments (mostly Windows IIS & SQL based).
• Assist on application server architecture for deployment of new applications: analyse requirements, assist on the design, and setup/deploy the application in acceptance and production environments.
• Contribute to and validate the technical and infrastructure parts of DRP and BCP documents, as well as being involved in their execution.
• Interface with (mainly IT) clients.
• Second-line troubleshooting of issues.
• Configuration of F5 load balancing VIPs for web applications.
• Supporting implementations on core applications: RabbitMQ, Redis Cache and other shared technologies – knowledge of these products is a nice to have.
• Ensure optimal 2nd/3rd level (interface to Microsoft and other 3rd parties) support.
• Keep operating and installation documentation for the above areas up to date.

• Be part of the duty role (24/7, 1 in 6 weeks) in this team.

Requirements:
• You are able to speak, read and write fluently English and French or Dutch. English mandatory for documents and international meetings, German is a plus.
Technical Skills:

• Proven recent experience in supporting Applications on Linux RedHat (deploy an application, verify logs, monitor health and performance of a system, create scripts).
• Proven recent expert experience with Windows Server (2012-2022).
• Proven knowledge of IIS management and web site deployments.
• Knowledge of PowerShell.
• Knowledge of MS-SQL, MongoDB, RabbitMQ, NEO4J or Redis Cache is a plus (on the job coaching/training as operator will be provided in missing knowledge).
• Understanding of firewalls and network load balancing concepts (product knowledge will be provided).
• Knowledge of DevOps and CI/CD pipelines.

Non-technical Skills:

• Team player, but able to work independently.
• Analytical skills for troubleshooting work.
• Pragmatic mindset and customer minded.
• Must be able and eager to learn new products or technologies (if not all of the above technologies are known, it is expected to learn them within a year maximum).
• For the Duty, you must have a driver's license and a mobile phone.

Additional information:

• Location: Brussels
• Telework: Elia's remote work policy is applicable to the delivery of the service. By default, a physical presence on site is required for 2 days per week.
• Must be available for duty role (24/7, 1 in 6 weeks)
• Must have a driver license and car (required for the duty role) and mobile phone;

• STANDBY: After the training period, the consultant will be assigned to standby duties as agreed in advance with the manager. While on standby, the consultant is not actively working but must remain reachable and ready to respond if needed. The consultant may stay at home or elsewhere, provided they can respond promptly and intervene using their ELIA laptop. If necessary, the consultant will return to the site during the standby period to perform the intervention.
o The consultant must be available and able to act immediately if contacted.
o Standby periods will be scheduled and agreed upon beforehand.