Senior Network Security Engineer, Fintech

Optasia
Athens
Workplace: OnsiteFull timeFunction: IT Operations (Systems/Network Admin)Experience: 5+ yearsSkills: ["Problem-solving","Analytical","Communication","Collaboration"]

Design, implement, and continuously improve enterprise network and security infrastructure to ensure stability, performance, and resilience. Deploy and maintain switching, routing, wireless networks, and next-generation firewalls; administer security tech like VPNs, segmentation, and network access control. Monitor, harden, troubleshoot incidents with root-cause analysis, and support Layer 2/Layer 3 services (VLANs, STP, routing, DNS/DHCP). Collaborate with internal teams and vendors and maintain technical documentation.

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FursaFursa
Optasia
Optasia
2 months ago

Senior Network Security Engineer, Fintech

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Last checked: 2 hours agoStatus: Live

Job Summary

Design, implement, and continuously improve enterprise network and security infrastructure to ensure stability, performance, and resilience. Deploy and maintain switching, routing, wireless networks, and next-generation firewalls; administer security tech like VPNs, segmentation, and network access control. Monitor, harden, troubleshoot incidents with root-cause analysis, and support Layer 2/Layer 3 services (VLANs, STP, routing, DNS/DHCP). Collaborate with internal teams and vendors and maintain technical documentation.
Location: Athens
Workplace: Onsite
Employment Type: Full time
Job Function: IT Operations (Systems/Network Admin)
Seniority: Mid level

Key Responsibilities

  • •Design, implement, and continuously improve enterprise network and security solutions.
  • •Deploy, configure, and maintain enterprise network infrastructure (switches, routers, wireless networks, next-generation firewalls).
  • •Administer and support security technologies including firewalls, VPNs, network access control, and network segmentation.
  • •Monitor and troubleshoot network and security infrastructure to ensure availability, performance, resilience, and perform root-cause analysis where needed.
  • •Support Layer 2/Layer 3 network services (VLANs, STP, LACP, routing, DNS, DHCP, TCP/IP) and maintain technical documentation and operational procedures.

Pay and Benefits

Perks:Health InsuranceAnnual Bonus

Key Requirements

  • •5+ years of hands-on experience as a Network Engineer or Network Security Engineer.
  • •Strong enterprise networking fundamentals, including TCP/IP, DNS, DHCP, VLANs, and IEEE 802.1X.
  • •Proficiency with Layer 2 technologies such as Spanning Tree Protocol and Link Aggregation Control Protocol.
  • •Strong knowledge of VPN technologies, including IPsec VPN and SSL VPN.
  • •Hands-on experience with Cisco networking and enterprise firewalls (Cisco ASA, Cisco Firepower) and/or Fortinet FortiGate.
Experience:5+ years
Skills:Problem-solvingAnalyticalCommunicationCollaboration
Certifications:Cisco CCNP EnterpriseCisco CCNP SecurityFortinet NSEFCPFCSS
Tech Stack:TCP/IPDNSDHCPVLANsIEEE 802.1XSpanning Tree Protocol (STP)Link Aggregation Control Protocol (LACP)RoutingVPNIPsec VPNSSL VPNCiscoCisco ASACisco FirepowerFortinet FortiGateWireless networkingWindowsLinuxNetwork monitoringNetwork troubleshooting

Company Brief

Optasia
Operates a digital health platform delivering online mental health and therapy services, connecting users with licensed therapists and providing tools for wellbeing, counselling, and remote treatment management to improve access to behavioral healthcare.
Industry: Mental Health
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