IT Security Engineer
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Do you want to join the exciting and innovating world of online banking?
Keytrade Bank is part of the Crédit Mutuel Arkéa Group, a well-established and reliable French banking group headquartered in Brest. As a pioneer in online banking in Belgium, Keytrade has grown into a fully digital bank offering a wide range of daily banking, investment and trading services.
Over the past years, we have experienced strong growth, doubling our client base in 5 years and continuously expanding our teams.
Unlike traditional banks, we operate with a dynamic, agile and scale-up mindset. We are a Brussels-based financial institution (± 400 employees) operating in a highly available, hybrid multi-cloud environment.
We are looking for a senior network & security engineer to reinforce our Network & Security team.
This role is both hands‑on and technical lead oriented (50/50). You will stabilize, maintain, and oversee a complex hybrid infrastructure while mentoring junior team members and acting as the go‑to escalation point.
You will report directly to the Head of Network & Security and collaborate closely with our dedicated Risk & Security team.
Responsibilities
Main Responsibilities
- Oversight of routing & switching infrastructure (Cisco-based environment)
- Oversight of firewalling and perimeter security (Palo Alto, Fortigate, Juniper)
- Oversight of load balancing (F5 BigIP LTM)
- L3 escalation support for internal IT teams
- Maintain, monitor, and stabilize hybrid cloud connectivity
- Coordinate with telecom providers, partners and external vendors
- Ensure documentation and operational best practices
Technical environment
- Network fabric
- Cisco switches & routers
- F5 BigIP LTM
Skills
What we are looking for
Must have
- 5+ years of experience in network engineering
- Strong expertise in enterprise routing & switching
- Proven hands‑on experience with:
- Cisco Catalyst switches and routers
- Palo Alto and/or Fortigate firewalls
- F5 bigIP LTM
- Experience working in hybrid cloud-connected environments
- Solid troubleshooting skills (L3 level)
- Professional English (written & spoken)
- Have a clean certificate of good behavior.
Nice to have
- Certifications such as CCNP/CCIE, Palo Alto next gen firewall engineer or Fortinet NSE
- Experience with Cisco Catalyst center
- Experience with scripting/automation languages
(Python, Ansible and/or Terraform) - Experience in financial services environments
- Experience with Linux RedHat
- Experience with traditional Microsoft products
- Operationally strong and comfortable in complex environments
- Structured, documentation-oriented mindset
- Calm and pragmatic under pressure
- Capable of balancing hands‑on work with technical coordination
- Natural mentor with strong communication skills
- Autonomous and delivery-focused
Offer
- Hybrid way of working: 50% office / 50% home working
- Agile way of working
- Green surroundings
- An inclusive workplace with nice colleagues
- A competitive salary package with advantages such as:
- Meal vouchers: €10 / working day
- Teleworking allowance
- Transport allowance
- Group insurance
- Hospitalisation insurance
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