Remote Senior Network Engineer – FinTech & Data Centers

XTB online investing; Województwo mazowieckie; Hybrid; PLN 240,000 - 420,000; Full time

Benefits offered by this job

Real influence on company/product

Training budget for courses and confs

Birthday day off

Parental day off

Private medical care and group insur

Wellbeing platform

Remote work from Warsaw or coworking

Job summary

XTB online investing in Poland seeks a senior Network Engineer to design, maintain and optimize enterprise networks across offices and data centers. You will manage BGP/OSPF, VXLAN/EVPN, and FTD/FMC/ASA security, and automate workflows with Terraform, Ansible and GitLab CI/CD.

Fluency in English and Polish, 5+ years in large-scale networks, and hands-on Cisco NX-OS/IOS-XE experience are essential. The role offers remote work options from Warsaw or coworking spaces, flexible career paths, and a

Qualifications

• 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.

Responsibilities

• 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.

Skills

Cisco Nexus

Cisco Catalyst

F5 BIG-IP LTM

F5 BIG-IP DNS/GSLB

BGP & OSPF

VXLAN/EVPN

WLAN & 802.1X

IPsec VPN

Firewall/NAT

DDoS protection

Wireshark/tcpdump

Terraform

Ansible

GitLab CI/CD

Education

Tools

Terraform

Ansible

GitLab CI/CD

Job description

XTB online investing in Poland seeks a senior Network Engineer to design, maintain and optimize enterprise networks across offices and data centers. You will manage BGP/OSPF, VXLAN/EVPN, and FTD/FMC/ASA security, and automate workflows with Terraform, Ansible and GitLab CI/CD.

Fluency in English and Polish, 5+ years in large-scale networks, and hands-on Cisco NX-OS/IOS-XE experience are essential. The role offers remote work options from Warsaw or coworking spaces, flexible career paths, and a