Senior Network Engineer, Fintech

Optasia

Network Engineer responsible for the stability and security of enterprise network infrastructure at Optasia. Involved in design, implementation, and continuous improvements of network and security solutions.

Posted 7/20/2026full-timeAthens • 🇬🇷 GreeceSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in enterprise network design, implementation, and security solutions, with a strong focus on network infrastructure management, security technologies, and compliance with industry best practices. Proficient in troubleshooting complex network incidents and maintaining technical documentation.

Highest-signal resume keywords

Network Infrastructure ManagementEnterprise Firewall PlatformsVPN TechnologiesCisco Networking TechnologiesNetwork Security Best Practices

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

TCP/IPDNSDHCPVLANsSpanning Tree ProtocolLink Aggregation Control ProtocolIPsec VPNSSL VPNNetwork HardeningVulnerability Remediation

Soft Skills

Problem-SolvingAnalytical SkillsCommunicationCollaboration

Tools & Technologies

Cisco ASACisco FirepowerFortinet FortiGateNetwork Monitoring ToolsWindows Operating SystemLinux Operating System

Certifications & Qualifications

Cisco CCNP EnterpriseCCNP SecurityFortinet NSEFCPFCSS

Industry Keywords

Network Access ControlNetwork SegmentationZero-Trust PrinciplesSecure Network ArchitectureAuthentication Services

Tech Stack

Tools & technologies

DNSFirewallsLinuxSwitchingTCP/IP

About the role

Key responsibilities & impact

Participate in the design, implementation, and continuous improvement of enterprise network and security solutions.
Deploy, configure, and maintain enterprise network infrastructure, including switches, routers, wireless networks, and next-generation firewalls.
Administer and support security technologies such as firewalls, VPNs, network access control, and network segmentation.
Monitor network and security infrastructure to ensure high availability, performance, and resilience.
Perform network hardening, vulnerability remediation, and security improvement activities.
Investigate and troubleshoot complex network and security incidents, including root cause analysis where required.
Support Layer 2 and Layer 3 network services, including VLANs, STP, LACP, routing, DNS, DHCP, and TCP/IP services.
Manage and support VPN technologies, including IPsec VPN and SSL VPN solutions.
Collaborate with internal technical teams, project managers, and external vendors to deliver infrastructure and security projects.
Participate in infrastructure upgrades, migrations, disaster recovery planning, and operational improvement initiatives.
Ensure network and security solutions comply with organizational policies and industry best practices.
Provide technical support and guidance to other IT teams when required.
Maintain accurate technical documentation, network diagrams, configuration standards, changes, and operational procedures.

Requirements

What you’ll need

5+ years of hands-on experience as a Network Engineer or Network Security Engineer.
Strong understanding of enterprise networking principles and protocols, including TCP/IP, DNS, DHCP, VLANs, and IEEE 802.1X.
Strong knowledge of Layer 2 technologies, including Spanning Tree Protocol and Link Aggregation Control Protocol.
Good understanding of Layer 3 routing technologies and protocols.
Strong knowledge of VPN technologies, including IPsec VPN and SSL VPN.
Extensive experience with Cisco networking technologies, including switching, routing, and enterprise campus networks.
Hands-on experience with enterprise firewall platforms such as Cisco ASA, Cisco Firepower, and Fortinet FortiGate.
Familiarity with enterprise wireless networking solutions.
Working knowledge of Windows and Linux operating systems.
Experience with network monitoring, troubleshooting, and diagnostic tools.
Understanding of network security best practices, including segmentation, zero-trust principles, and secure network architecture.
Familiarity with authentication and identity services such as RADIUS, Active Directory, and LDAP.
Experience with vulnerability assessment, hardening, and remediation processes.
Ability to create and maintain technical documentation, network diagrams, configuration standards, and standard operating procedures.
Excellent problem-solving, analytical, communication, and collaboration skills.
Professional certifications such as Cisco CCNP Enterprise, CCNP Security, Fortinet NSE, FCP, or FCSS will be considered an advantage.

Benefits

Comp & perks

Competitive remuneration package
Extra day off on your birthday
Performance-based bonus scheme
Comprehensive private healthcare insurance
All the tech gear you need to work smart
Be a part of a multicultural working environment
Meet a very unique and promising business and industry
Gain insights for tomorrow market’s foreground
A solid career path within our working family is ready for you
Continuous training and access to online training platforms
Enjoy comfortable open space restaurant with varied meal options every day
Wellbeing activities access such as free on-site yoga classes, plus available squash court on our premises