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NRB

System Engineer Medior Domain Expert

On site

Brussels, Belgium

Freelance

29-10-2025

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Skills

Communication Python Bash PowerShell SQL MongoDB Neo4J Coaching Architecture Linux Redhat Windows SQL Server Software Development Redis Windows Server

Job Specifications

Job Description

Looking for a change? New challenges?

Want to boost your career in a System Engineer role? Join our Local Managed Staffing team at NRB!

The NRB Group, now a leader in Belgium's ICT sector, offers a wide range of IT services to meet all your IT needs, from Infrastructure & Cloud to Software Development, Consultancy & Managed Staffing.

Find out more here.

Our client, a European transmission system operator, along with 50Hertz in Germany, ensures the reliability and sustainability of electricity.

Working alongside other team members, you will contribute to building a sustainable, reliable, and environmentally friendly energy infrastructure.

The IT Infrastructure department is looking for a System Engineer Medior (Domain Expert) to join the application team. You will be responsible for deploying in-house applications in acceptance and production environments, as well as managing system architecture, capacity planning, and performance optimization of applications and middleware (Microsoft SQL Server, MongoDB, RabbitMQ…).

Expertise in Windows deployment strategies is required. Knowledge of Linux and hybrid cloud environments is a plus.

We are seeking a candidate with a strong understanding of system architectures and support, who can quickly learn the specifics of the client’s infrastructure.

Service Description:

Deploy and manage the infrastructure for internal applications (Windows IIS, SQL) in acceptance and production environments.
Participate in the design and architecture of new applications, analyze requirements, and oversee their deployment.
Provide advanced support and perform root cause analysis for complex system issues.
Configure F5 load balancing and optimize overall system performance.
Support core applications (RabbitMQ, Redis Cache …).
Ensure level 2/3 support and maintain system architecture documentation.

Job requirements

Requirements:

Fluent in English; French or Dutch a plus
Experience with Windows Server (2012-2022); Linux (RedHat) a plus
Skills in IIS, application deployment, system integration, PowerShell, scripting (Bash/Python)
Knowledge of MS-SQL, MongoDB, RabbitMQ, NEO4J, Redis Cache a plus
Understanding of networks and security
Team-oriented yet autonomous, quick learner, able to share knowledge
Excellent communication skills

Additional information :

Location: Brussels (Schaerbeek), occasional travel to Berlin
24/7 on-call duty (1 week out of 6)
Driver’s license and vehicle required
Start: ASAP, Duration: 1 year (extendable)

Our offer:

Contractual flexibility, a permanent contract or a freelance assignment;²
Flexible working hours with the possibility of teleworking (1 to 3 days a week);
A team of enthusiastic, professional and talented colleagues in a good mood and atmosphere;
Personalized career coaching to support your development;
A company with a pleasant, dynamic and innovative working atmosphere.

About the Company

In 2023, The NRB Group realised total revenues of €577.5 million, employing over 3,670 collaborators. This positions the Group amongst the top 3 of the ICT sector in Belgium. NRB offers a complete range of ICT services in four areas: consultancy, software, infrastructure & cloud services and managed staffing. NRB disposes of state of the art datacenters at two geo-resilient sites in Belgium. Whereas NRB focuses on specific sectors such as the public and social sector, the sector of energy & utilities, the financial service... Know more