Senior Network Security Engineer - Firewall & SDN

Natixis in Portugal; Lisboa; Híbrido; EUR 60 000 - 90 000; Tempo integral

Resumo da oferta

Natixis in Portugal seeks an experienced Network Security Engineer to design, implement, and maintain secure network perimeters and security infrastructure in a hybrid work setting. The role emphasizes firewall administration, incident handling, and security policy compliance.

The candidate should bring 5+ years in network security, deep knowledge of TCP/IP, BGP, OSPF, VLANs, VPNs, and experience with NSX/SDN environments, plus comfort with audits and on-call duties.

Qualificações

• 5+ years of experience in network security engineering.
• Proven expertise in firewall administration in large-scale enterprise environments.
• Strong knowledge of network protocols (TCP/IP, BGP, OSPF, VLANs, VPNs).
• Experience with NSX / SDN environments is a strong plus.
• Familiarity with compliance frameworks (ISO 27001, NIST, etc.).
• Experience participating in security audits (internal and external).
• Ability to work autonomously and manage priorities in a fast-paced environment.
• Strong communication skills — capable of clearly explaining technical decisions to both technical and non-technical stakeholders.
• Availability for on-call duties and out-of-hours interventions.

Responsabilidades

• Implement flow matrices aligned with project requirements and security standards.
• Design and deploy firewall filtering rules in compliance with internal security policies.
• Contribute to the architecture and evolution of the security infrastructure.
• Analyze and process filtering policy modification requests.
• Perform troubleshooting to identify root causes of network dysfunctions and propose corrective actions and workarounds.
• Implement and maintain firewall filtering rules on a daily basis, respecting operational guidelines and internal security policies.
• Define and enforce best practices for system management, operability, and technical qualification.
• Propose solutions to improve RUN activity performance and efficiency.
• Apply and enforce the internal Security Policy.
• Conduct Level 1 Periodic Security Controls to monitor policy compliance.
• Validate and process security policy derogation requests.
• Participate in internal and external audits.
• Implement audit recommendations and compliance remediation requests.
• Write and maintain security guides and standards.
• Ensure Operational Maintenance of security infrastructures (Firewall filtering, Web filtering, Proxies).
• Supervise, handle, and resolve incidents and problems.
• Install, configure, and qualify security systems and products.
• Propose innovative solutions to improve security, quality, performance, and operational costs.
• Conduct technology watch to stay up to date with the latest trends and threats in network security.
• Provide expert advice on the implementation of new security solutions.
• Participate in out-of-hours interventions and regular on-call duties covering network and security perimeters (Firewall filtering, Web filtering, Proxies).
• Collaborate effectively within the team, demonstrating autonomy and clear communication — being able to explain clearly what is being done and why.

Conhecimentos

Network security engineering

Firewall administration

Communication skills

Autonomy

On-call management

Formação académica

Bachelor's degree in Computer Science, Network Engineering, or Cybersecurity

Ferramentas

NSX

SDN

SIEM

SOC tools

Ansible

Python scripting

Cloud security

ITIL processes

Descrição da oferta de emprego

Natixis in Portugal seeks an experienced Network Security Engineer to design, implement, and maintain secure network perimeters and security infrastructure in a hybrid work setting. The role emphasizes firewall administration, incident handling, and security policy compliance.

The candidate should bring 5+ years in network security, deep knowledge of TCP/IP, BGP, OSPF, VLANs, VPNs, and experience with NSX/SDN environments, plus comfort with audits and on-call duties.