Network & Security Engineer

Bulutistan; Fatih; On-site; TRY 500,000 - 800,000; Full time

Job summary

Bulutistan is seeking a Network Security Engineer to join our team in Turkey. You will manage secure network connectivity, monitor performance, and support security operations across data centers and cloud environments.

The role requires strong routing, VPN, firewall, and incident management skills, with experience in financial services preferred. You will collaborate with cloud and infrastructure teams and contribute to change management and audits.

Qualifications

• Bachelor’s degree in Computer/Electrical/Electronics Engineering or related field.
• 5+ years in network/security engineering, with banking/financial experience preferred.
• Strong routing, switching, VLANs, STP, BGP/OSPF, and traffic optimization knowledge.
• Experience with enterprise network platforms (Cisco/Juniper/HP-Aruba or equivalent).
• VPN, IPSec/GRE/MPLS, load balancing, and network monitoring expertise.
• Ability to troubleshoot L2/L3 incidents in structured environments.

Responsibilities

• Monitor and optimize network infrastructure across data centers, cloud, and connectivity points.
• Operate and maintain routers, switches, load balancers, and wireless networks.
• Perform L2/L3 troubleshooting, incident handling, and escalation as needed.
• Configure VPN tunnels, MPLS, GRE, and IPsec for secure inter-site links.
• Implement firewall rule updates and access changes per security policies.
• Support DR/network continuity, capacity planning, and change management.
• Collaborate with cloud and infra teams for onboarding and testing.
• Maintain topology diagrams, inventories, and operational documentation.
• Assist audits with network-related evidence and RCA participation.

Skills

Routing & Switching

BGP/OSPF

VPN Technologies

Network Monitoring

Firewall Operations

Incident Management

L2/L3 Troubleshooting

Education

Bachelor’s degree in related field

Tools

Cisco

Juniper

HP/Aruba

Zabbix

SolarWinds

PRTG

Job description

We are looking for a Network Security Engineer to join our team, bringing strong expertise in network infrastructure, security operations, and connectivity solutions, preferably within financial services environments.

Responsibilities

• Monitor, manage, and optimize network infrastructure across data centers, cloud environments, and customer connectivity points.
• Operate and maintain enterprise network devices and services, including routers, switches, load balancers, wireless networks, and network monitoring tools.
• Perform L2/L3 troubleshooting, incident management, and escalation to resolve network performance, connectivity, and availability issues.
• Configure and maintain VPN tunnels, MPLS, GRE, and IPsec connections to ensure secure and reliable inter-site connectivity.
• Implement routine firewall rule updates and network access changes in accordance with established security policies and change management procedures.
• Support disaster recovery (DR) network operations, redundancy planning, and network capacity management.
• Support secure connectivity and integration with FinTech partners, SWIFT gateways, and cloud service providers.
• Maintain accurate network topology diagrams, configuration inventories, operational documentation, and change records.
• Collaborate with cloud and infrastructure teams on service onboarding, network provisioning, and connectivity testing.
• Ensure network operations comply with internal standards, documentation requirements, and applicable security and compliance controls.
• Support internal and external audits by providing network-related documentation and operational evidence.
• Participate in root cause analysis (RCA) and contribute to the continuous improvement of network operations and incident management processes.
• Perform packet analysis and investigate suspicious network activities to support troubleshooting and security incident investigations.

Qualifications

• Bachelor’s degree in Computer Engineering, Electrical/Electronics Engineering, or a related field
• 5+ years’ experience in network/security engineering, with at least 2 years in a banking or financial institution
• Strong knowledge of routing, switching, VLANs, STP, BGP/OSPF, and traffic optimization
• Experience with enterprise network platforms (Cisco, Juniper, HP/Aruba, or equivalent)
• Familiarity with VPN technologies, IPSec/GRE/MPLS, and load balancing
• Understanding of network monitoring tools (Zabbix, SolarWinds, PRTG, or similar)
• Ability to troubleshoot L2/L3 incidents and manage operational changes in a structured environment

Preferred Skills & Certifications

• CCNA, CCNP Enterprise, JNCIS/JNCIP, or equivalent
• Basic exposure to firewall operations (Palo Alto, Fortinet, Cisco ASA, or Check Point)
• Understanding of ITIL processes and experience working in NOC/SOC/large-scale operations teams