Freelance Senior Network Engineer - Long‑Term On‑Site Assignment (Antwerp)
A leading financial organization is looking for a Freelance Senior Network Engineer to strengthen and evolve its enterprise network and security environment. You will work on architecture, lifecycle management, deep‑dive engineering, and complex troubleshooting in a stable, high‑quality setting.
Responsibilities
* Design, maintain, and improve enterprise network and security architecture
* Create HLD/LLD designs and support modernization initiatives
* Configure and operate routing, switching, firewalls, and load balancers
* Troubleshoot multilayer issues using packet flows and performance analysis
* Lead lifecycle management, migrations, and infrastructure upgrades
* Act as senior escalation point for incidents and problem management
* Contribute to security controls (NGFW, IDPS, NAC, WAF, Zero Trust) and compliance
* Maintain documentation and drive automation initiatives
Qualifications
* Minimum 6–7 years of experience as a Network Engineer in an enterprise environment
* MUST‑HAVE: Palo Alto Firewalls
* MUST‑HAVE: Juniper Switching (EX/QFX)
* MUST‑HAVE: Juniper SRX
* MUST‑HAVE: F5 LTM & F5 ASM
* Strong knowledge of routing, switching, load balancing, VPNs, and security protocols
* Experience with packet analysis, performance tuning, and traffic engineering
* Knowledge of EVPN/VXLAN, BGP, Azure Networking, Infoblox, or Cloudflare is a plus
* Strong analytical and communication skills; able to coach and guide others
* Fluency in English required; Dutch is a strong plus
What’s Offered
* Long‑term full‑time on‑site assignment in Antwerp (5 days per week on site)
* Stable, collaborative engineering environment with low turnover
* Opportunities for continuous learning and technical ownership
* A culture built on trust, professionalism, and long‑term vision