FEL261001P2A1: Senior F5 BIG-IP Engineer (60% Remote, Brüssel, NL/FR/EN)

joyIT Recruiting GmbH
Contact person: joyIT Recruiting GmbH
Brüssel,  Belgium
60% remoteFreelanceStart date 11/2026Duration 14 months100% workload

Description

The Belgian, German and European energy landscape is in full swing. The client is a European transmission system operator that ensures the reliability and sustainability of the electricity supply in Belgium and Germany.
Side-by-side with other contingent workers and internal staff, you will play a part in building a sustainable, green and reliable energy infrastructure that stimulates economic growth and reduces the ecological footprint. The client believes that an inclusive and diverse work environment leads to more innovation, creativity and better results.
The F5 BIG-IP solution is an important central component within the client’s data-centre infrastructure and is heavily used to implement application load balancing, high-availability concepts and security features. The client is looking for an F5 Networking and Security Engineering Service.

Responsibilities
The F5 Networking and Security Engineering Service consists of following tasks:
  • Load-balancing and high-availability architecture design.
  • Design and implementation of F5 BIG-IP solutions for application delivery and network traffic management.
  • Configuration and administration of virtual servers, pools, nodes, monitors, iRules, SSL profiles and traffic policies.
  • SSL/TLS certificate management, SSL offloading, encryption configuration, traffic inspection and reporting.
  • Web Application Firewall (AWAF) deployment and policy management, depending on the client’s needs.
  • Authentication and access management integration using APM and enterprise identity services.
  • Performance tuning, capacity planning and service optimisation.
  • Incident, problem and change management support.
  • Security patching, software upgrades and lifecycle management of F5 infrastructure.
  • Root cause analysis and troubleshooting of application delivery, connectivity and performance issues.
  • Documentation, operational procedures and knowledge transfer activities to stakeholders.
Qualifications
  • Should hold a bachelor’s or master’s degree in electronics, ICT or telecommunications, or have equivalent technical experience in this field.
  • Must have all-round and in-depth conceptual, practical and operational knowledge of IP networks and their management in multi-site environments and data centres.
  • Must have advanced knowledge of F5 solutions and extensive experience in designing and implementing them in complex environments.
  • Should have all-round knowledge and experience of IT security concepts, architectures and implementations, for example Check Point and Palo Alto firewall technology.
  • Must be willing to continuously refine and broaden technical knowledge.
  • Needs to be able to work independently and methodically, have a sense of responsibility and assess risks accurately.
  • Needs to be customer-oriented and cope well with stress.
  • Needs to be flexible and approachable; tasks may be suddenly interrupted by urgent operational issues.
  • Must have good communication skills for interacting with colleagues, departments, suppliers and service providers.
  • Must be able to speak, read and write Dutch, French and English.

Additional informations
  • Work duration and estimated hours: 40 hours/week.
  • City: Brussels.
  • Remote: Remote working is allowed for a maximum of 3 days/week and depends on the tasks.
  • Languages: Dutch, French and English.

Next Steps
If the application process provides an option to send an email or a comparable notification, please activate it so that we can remain in contact with you.
After submitting your application, you will automatically receive an application link for the next steps in the process.
Please apply only if you are professionally qualified for the position and your rate expectations are suitable for the project.

We look forward to receiving your application.
Your team at joyIT.

Application form