Network Security Engineer

For one of our clients based in Schaerbeek, Brussels, we are looking for an experienced Senior F5 Network & Security Engineer to join a mission-critical infrastructure team. The F5 BIG-IP platform is a key component of the customer's data center environment, supporting application delivery, load balancing, high availability, security services, and network traffic management.

Key Responsibilities

- Design load balancing and high-availability architectures.
- Design and implement F5 BIG-IP solutions for application delivery and network traffic management.
- Configure and administer Virtual Servers, Pools, Nodes, Monitors, iRules, SSL Profiles, and Traffic Policies.
- Manage SSL/TLS certificates, SSL off loading, encryption configurations, traffic inspection, and reporting.
- Deploy and manage Web Application Firewall (AWAF) policies based on business and security requirements.
- Integrate authentication and access management services using F5 APM and enterprise identity platforms.
- Perform performance tuning, capacity planning, and continuous service optimization.
- Provide support for Incident, Problem, and Change Management processes.
- Execute security patching, software upgrades, and lifecycle management activities for the F5 infrastructure.
- Conduct root cause analysis and troubleshoot application delivery, connectivity, and performance issues.
- Develop and maintain technical documentation, operational procedures, and knowledge transfer materials for stakeholders

Required Qualifications

- Bachelor's or Master's degree in Telecommunications,



ICT, Electronics, Computer Science, or equivalent relevant experience.
- Strong conceptual, operational, and practical knowledge of IP networking in multi-site and data center environments.
- Extensive hands-on experience designing, implementing, and supporting F5 BIG-IP solutions in complex enterprise environments.
- Solid understanding of IT security principles, architectures, and implementations.
- Experience with security technologies such as Check Point and Palo Alto firewalls is highly desirable.
- Commitment to continuous learning and professional development.
- Strong analytical, troubleshooting, and problem-solving skills.
- Ability to work independently, take ownership, and accurately assess risks.
- Customer-focused mindset with the ability to work effectively under pressure.
- Flexible and adaptable approach to managing operational priorities and urgent incidents.
- Excellent communication and stakeholder management skills.

Languages

Applicants must be able to speak, read, and write:

- Dutch
- French
- English

What We Offer

- A challenging role within a highly critical and innovative infrastructure environment.
- Exposure to advanced networking, application delivery, and security technologies.
- Opportunities for professional growth and continuous technical development.
- A collaborative team environment with a strong focus on expertise and knowledge sharing.
- Adaptable hybrid working arrangements, with up to 3 days of remote work per week depending on operational requirements

📌 Network security engineer (España)
🏢 Econocom Belgium
📍 España