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Web Application Firewall (WAF) Security Engineer
Web Application Firewall (WAF) Security EngineerCTG IT Solutions • Bollendorf, DE
Web Application Firewall (WAF) Security Engineer

Web Application Firewall (WAF) Security Engineer

CTG IT Solutions • Bollendorf, DE
Vor 30+ Tagen
Stellenbeschreibung

The WAF Security Engineer is responsible for operating, securing, and evolving the organization’s  application exposure and protection platforms .

The role focuses on  Web Application Firewalls (WAF) ,  reverse proxies ,  anti-DDoS , and  external access services , ensuring the confidentiality, integrity, and availability of business-critical applications.

The engineer works closely with network, security, and application teams to protect Internet-facing services against  Layer-7 threats , bots, abuse patterns, and volumetric or application-level attacks.

Responsibilities :

WAF & Application Security Operations

  • Operate and maintain  multi-vendor WAF platforms  (F5, ADC Netscaler & AWS).
  • Design, configure, and maintain  application security policies , including :
  • Positive and negative security models
  • Signature-based protection and behavioral analysis
  • Bot mitigation, brute-force protection, and abuse prevention
  • Manage the  full lifecycle of WAF rules : creation, tuning, validation, deployment, and optimization.
  • Analyze and reduce false positives / negatives while maintaining application availability and performance.

Reverse Proxy & External Access Services

  • Operate  reverse proxy and external access gateways  ( F5, ADC Netscaler & AWS ).
  • Manage  SSL / TLS offloading , certificate lifecycle, and cryptographic standards.
  • Support secure application exposure across  DMZ, on-premise, private cloud, and hybrid environments .

    • Anti-DDoS & Resilience

  • Support  anti-DDoS solutions  (AWS-based and ISP-managed services) integrated with WAF platforms.
  • Participate in attack mitigation strategies for volumetric and application-layer threats.

    • Security Operations & Governance

  • Monitor security events, alerts, and dashboards related to WAF and external access services.
  • Handle  incident and problem management , including troubleshooting, root cause analysis (RCA), and post-incident reports (PIR).
  • Participate in  change and configuration management , including upgrades, patches, and controlled rollouts.
  • Maintain operational documentation, architecture diagrams, and configuration inventories.
  • Coordinate with vendors and third parties for escalations and technical support.

    • Experience :

  • 7+ years of experience in  network and application security operations .
  • Strong hands-on experience with  Web Application Firewalls  (F5, NetScaler).
  • Solid understanding of  HTTP / S, SSL / TLS, web architectures, and application flows .
  • Experience securing  Internet-facing applications  in large, multi-site enterprise environments.

    • Additional experience or knowledge in the following technologies is considered a strong asset :

  • Network Firewalls (Fortinet FortiGate, CheckPoint).
  • Secure remote access and VPN solutions (Cisco ASA / AnyConnect).
  • Identity and access services (Cisco ISE, RSA MFA).
  • Network security management and policy analysis tools.
  • Secure DNS, IPAM, and infrastructure services.
  • Fluent in English, knowledge of French

    • Our Offer :

  • An  attractive salary  package with or without a company car
  • 5 additional vacation days  each year
  • A dedicated  training program  with personal development plans
  • Extra-legal advantages (IT material, banks, ...)
  • Regular  events  with the CTG team : learning lunchs, team buildings, fun events, Xmas, Marathons, ...

    • If you like multicultural teams and want to join a company with open communication, then apply right now !

    Please note that a criminal record will be asked for this position.

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