Senior Network Engineer
XTB · Remote · Posted November 5, 2026
- Who can apply
- Poland
- Pay
- 21.25k PLN–27k PLN a month
- How you’d be employed
- Employee
- Level
- Senior
- Location in the posting
- Warsaw
- Skills required
- LAN/WAN/WLAN networking, Cisco Nexus, BGP, OSPF, VXLAN/EVPN, F5 BIG-IP, Terraform, Ansible, IPsec VPN, VLAN
- Benefits in the posting
- Health insurance, Home office budget, Coworking budget, Learning budget, Team offsites, Wellbeing budget
Analyzed from the full posting. Quotes are the posting’s own words.
From the posting
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.
Requirements
- 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.
- Knowledge of IP multicast, including IGMP and PIM.
- Knowledge of Kubernetes networking, including CNI, routing, NetworkPolicy, and load balancing.
- Experience in high-availability, low-latency environments, such as fintech, trading, or telecommunications.
What we offer
- 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.
Benefits
- 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.
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