{"id":3818448,"url":"https://alion.io/job/xtb-senior-network-engineer","title":"Senior Network Engineer","company":{"id":2723,"name":"XTB","domain":"xtb.com","url":"https://alion.io/company/xtb","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":95,"open_postings":3,"ghost_share":0,"stale_share":0,"repost_share":0.333,"time_to_fill_p50_days":51,"computed_at":"2026-11-06T05:58:05Z"}},"role":"Networking","role_family":"Networking","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":21250,"max":27000,"currency":"PLN","period":"month","gross":null,"usd_annual":82800},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"BGP","optional":false},{"name":"CI/CD","optional":false},{"name":"DNS","optional":false},{"name":"GitLab CI","optional":false},{"name":"OSPF","optional":false},{"name":"Tcpdump","optional":false},{"name":"Terraform","optional":false},{"name":"VLAN","optional":false},{"name":"VPN","optional":false},{"name":"Wireshark","optional":false},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"Kubernetes","optional":true}],"status":"live","first_seen_at":"2026-11-05T13:36:44Z","employer_posted_date":"2026-11-05","last_verified_at":"2026-11-06T11:01:44Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"XTB is a global company from the financial industry, focusing on online trading of financial instruments. We are the largest FinTech in Poland and a leader in Central and Eastern Europe, and the range of our operations covers several countries, including Asia and South America. At XTB, we focus on the development of our employees, giving them opportunities to gain knowledge and skills in various fields, as well as offering a number of training and development programs. If you are looking for challenges and want to gain valuable experience in an international business environment, XTB is the right place for you.\nWe are a certified Great Place to Work company.\nResponsibilities\nDesigning, maintaining, and developing LAN/WAN/WLAN networks across offices and data centers.\nManaging traditional data center networks and VXLAN/EVPN-based IP fabrics.\nConfiguring and optimizing BGP and OSPF routing, inter-site connectivity, and connections to service providers.\nAdministering firewalls, security policies, and IPsec VPN tunnels.\nAdministering F5 BIG-IP LTM and F5 BIG-IP DNS/GSLB, including load balancing and traffic distribution across data centers.\nMaintaining and tuning DDoS protection solutions and participating in incident response.\nMonitoring infrastructure, troubleshooting issues, and optimizing network performance and availability.\nPlanning and implementing changes, upgrading infrastructure, and testing redundancy and failover mechanisms as part of BCP/DR initiatives.\nAutomating infrastructure management and operational workflows using Terraform, Ansible, and GitLab CI/CD.\nCreating and maintaining technical documentation, configuration standards, and operational procedures.\nPerforming root cause analysis and implementing preventive measures in collaboration with infrastructure, security, and application teams.\nRequirements\n5+ years of hands-on experience in maintaining and developing enterprise and data center networks.\nStrong 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.\nPractical knowledge of switching technologies and high-availability mechanisms, including VLAN, STP, LACP, vPC, and HSRP/VRRP.\nExperience in configuring and troubleshooting BGP and OSPF routing.\nPractical knowledge of VXLAN/EVPN IP fabric architecture, including underlay and overlay networks.\nExperience in managing WLAN networks, controllers, and access points, along with knowledge of 802.1X, RADIUS, and TACACS+.\nPractical knowledge of firewalls, security policies, ACLs, NAT, and IPsec VPNs.\nExperience in administering F5 BIG-IP LTM and F5 BIG-IP DNS/GSLB, including load balancing, health monitors, and global server load balancing.\nKnowledge of DDoS protection mechanisms and the ability to analyze network traffic during incidents.\nStrong troubleshooting skills using monitoring systems, logs, NetFlow/sFlow data, and tools such as Wireshark and tcpdump.\nHands-on experience with Terraform, Ansible, and GitLab CI/CD for network infrastructure automation.\nAbility to independently manage changes and resolve issues, take ownership of infrastructure, and proactively improve the environment.\nPolish proficiency sufficient for fluent communication.\nGood technical English, spoken and written, at a minimum B2 level, enabling communication with vendors and work with technical documentation.\nNice to Have\nExperience with Azure/AWS networking services and their integration with on-premises infrastructure.\nKnowledge of IP multicast, including IGMP and PIM.\nKnowledge of Kubernetes networking, including CNI, routing, NetworkPolicy, and load balancing.\nExperience in high-availability, low-latency environments, such as fintech, trading, or telecommunications.\nWhat we offer\nReal influence on the development of the company and the product.\nWork in an experienced team that is happy to share its knowledge.\nA clear vision of development thanks to regular feedback and clear career paths.\nRegular team-building meetings.\nBenefits\nA training budget for courses and conferences that interest you.\nAn extra day off on your birthday.\nAn extra day off for parents.\nEquipment tailored to your needs.\nPrivate medical care and group insurance.\nAccess to an e-learning platform for learning English and a benefits platform.\nAccess to a wellbeing 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