Senior Network Engineer

XTB online investing

. Designing, maintaining, and developing LAN/WAN/WLAN networks across offices and data centers.

Posted 11/5/2026full-timeRemote • PolandSenior💰 PLN 21,250 - PLN 27,000 per monthWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing, maintaining, and optimizing enterprise and data center networks, with a strong focus on routing protocols, security policies, and automation tools. Proficient in managing high-availability mechanisms and incident response while ensuring network performance and reliability.

Highest-signal resume keywords

BGP And OSPF RoutingCisco Nexus And Catalyst PlatformsF5 BIG-IP LTM And DNS/GSLB AdministrationTerraform And Ansible For AutomationDDoS Protection Mechanisms

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

LAN/WAN/WLAN Network DesignVXLAN/EVPN IP Fabric ArchitectureFirewall AdministrationNetwork Performance OptimizationRoot Cause AnalysisSwitching TechnologiesHigh-Availability MechanismsMonitoring SystemsNetwork Traffic AnalysisInfrastructure Change Management

Soft Skills

Problem-SolvingOwnershipCollaborationCommunication

Tools & Technologies

Cisco Firepower Threat DefenseCisco ASA FirewallsWiresharkTcpdumpGitLab CI/CD

Industry Keywords

Data Center NetworksIncident ResponseBCP/DR Initiatives802.1XRADIUSTACACS+Azure Networking ServicesAWS Networking ServicesFintechTelecommunications

Tech Stack

Tools & technologies

AnsibleAWSAzureDNSFirewallsiOSKubernetesSwitchingTerraform

About the role

Key responsibilities & impact

Designing, maintaining, and developing LAN/WAN/WLAN networks across offices and data centers.
Managing traditional data center networks and VXLAN/EVPN-based IP fabrics.
Configuring and optimizing BGP and OSPF routing, inter-site connectivity, and connections to service providers.
Administering firewalls, security policies, and IPsec VPN tunnels.
Administering F5 BIG-IP LTM and F5 BIG-IP DNS/GSLB, including load balancing and traffic distribution across data centers.
Maintaining and tuning DDoS protection solutions and participating in incident response.
Monitoring infrastructure, troubleshooting issues, and optimizing network performance and availability.
Planning and implementing changes, upgrading infrastructure, and testing redundancy and failover mechanisms as part of BCP/DR initiatives.
Automating infrastructure management and operational workflows using Terraform, Ansible, and GitLab CI/CD.
Creating and maintaining technical documentation, configuration standards, and operational procedures.
Performing root cause analysis and implementing preventive measures in collaboration with infrastructure, security, and application teams.

Requirements

What you’ll need

5+ years of hands-on experience in maintaining and developing enterprise and data center networks.
Strong practical knowledge of Cisco Nexus and Catalyst platforms, including NX-OS and IOS-XE, as well as Cisco Firepower Threat Defense (FTD), Firepower Management Center (FMC), and Cisco ASA firewalls.
Practical knowledge of switching technologies and high-availability mechanisms, including VLAN, STP, LACP, vPC, and HSRP/VRRP.
Experience in configuring and troubleshooting BGP and OSPF routing.
Practical knowledge of VXLAN/EVPN IP fabric architecture, including underlay and overlay networks.
Experience in managing WLAN networks, controllers, and access points, along with knowledge of 802.1X, RADIUS, and TACACS+.
Practical knowledge of firewalls, security policies, ACLs, NAT, and IPsec VPNs.
Experience in administering F5 BIG-IP LTM and F5 BIG-IP DNS/GSLB, including load balancing, health monitors, and global server load balancing.
Knowledge of DDoS protection mechanisms and the ability to analyze network traffic during incidents.
Strong troubleshooting skills using monitoring systems, logs, NetFlow/sFlow data, and tools such as Wireshark and tcpdump.
Hands-on experience with Terraform, Ansible, and GitLab CI/CD for network infrastructure automation.
Ability to independently manage changes and resolve issues, take ownership of infrastructure, and proactively improve the environment.
Polish proficiency sufficient for fluent communication.
Good technical English, spoken and written, at a minimum B2 level, enabling communication with vendors and work with technical documentation.
Nice to have: Experience with Azure/AWS networking services and their integration with on-premises infrastructure.
Nice to have: Knowledge of IP multicast, including IGMP and PIM.
Nice to have: Knowledge of Kubernetes networking, including CNI, routing, NetworkPolicy, and load balancing.
Nice to have: Experience in high-availability, low-latency environments, such as fintech, trading, or telecommunications.

Benefits

Comp & perks

Real influence on the development of the company and the product
Work in an experienced team that is happy to share its knowledge
A clear vision of development thanks to regular feedback and clear career paths
Regular team-building meetings
A training budget for courses and conferences that interest you
An extra day off on your birthday
An extra day off for parents
Equipment tailored to your needs
Private medical care and group insurance
Access to an e-learning platform for learning English and a benefits platform
Access to a wellbeing platform
Remote work, from the office in Warsaw or from a coworking space in your city