{"id":3454267,"url":"https://alion.io/job/domain-crawler-linux-system-administrator-wroclaw-hybrid","title":"Linux System Administrator (Wrocław, hybrid)","company":{"id":2090340,"name":"Domain Crawler","domain":"domaincrawler.com","url":"https://alion.io/company/domaincrawler","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"middle","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Ukraine"],"countries":["UA"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":3400,"max":3900,"currency":"USD","period":"month","gross":false,"usd_annual":46800},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"CI/CD","optional":false},{"name":"Configuration Management","optional":false},{"name":"Debian","optional":false},{"name":"DNS","optional":false},{"name":"GitLab","optional":false},{"name":"Grafana","optional":false},{"name":"Jenkins","optional":false},{"name":"Linux","optional":false},{"name":"Prometheus","optional":false},{"name":"TCP/IP","optional":false},{"name":"Ubuntu","optional":false},{"name":"VPN","optional":false},{"name":"Graylog","optional":true},{"name":"Loki","optional":true}],"status":"live","first_seen_at":"2026-10-22T16:54:39Z","employer_posted_date":null,"last_verified_at":"2026-10-22T16:54:39Z","board_verified":false,"closed_at":null,"days_open":19,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":19},"description":"About the role.\n\nWe're hiring a mid-level Linux System Administrator in Wrocław to run our on-premise infrastructure: our own physical servers in Stockholm. You'll keep the servers, the operating system, and our core services healthy and secure, work alongside our developers, and travel to Stockholm several times a year to install and replace hardware.\n\nSeniority: Mid (3+ years)\n\nLocation: Wrocław, Poland. Hybrid: remote + office in Wrocław, flexible office days. We’re looking for someone based in or near Wrocław (or willing to relocate).\n\nContract: B2B with DomainCrawler AB, Sweden\n\nRate: 3,000–3,500 EUR net per month (B2B invoice)\n\nTravel: Stockholm, several times a year , costs covered\n\nDomainCrawler is a Swedish company that provides structured domain name data to businesses. Our database covers more than 1.4 billion registered and unregistered domains, with a wide range of data on each: DNS, SSL certificates, ownership, hosting, technologies and more. Domain registries and registrars, brand protection agencies and\n\nOSINT investigators use it to fight counterfeiting, uncover threats and research markets.\n\nResponsibilities:\n\nMonitor the health of the servers and services, and fix issues when they come up.\n\nPatch and update Debian, including major release upgrades.\n\nKeep our self-hosted CI/CD and source control tools running: upgrades, backups runners and agents, plugins. Developers own the pipelines.\n\nKeep the runtime environment for our services working: OS packages, systemd and logs.\n\nRun backups, test restores regularly, and keep the disaster recovery plan up to date.\n\nManage the network: switches, firewalls, VPN.\n\nHandle security: hardening, vulnerability scanning, and access management (SSH keys, sudo, onboarding and offboarding).\n\nExtend our Prometheus and Grafana monitoring, and bring all servers under configuration management.\n\nLook after hardware: catch failing disks, memory and other components early (SMART, ECC and kernel errors), firmware and BMC updates, RAID health.\n\nCoordinate on-site remote-hands support between visits.\n\nTravel to Stockholm several times a year to install and replace hardware.\n\nKeep documentation up to date: hardware inventory , network diagrams and runbooks.\n\nWork with developers on what they need from the infrastructure, and contribute to capacity planning.\nMust-have:\n\n3+ years administering Linux servers in production, with hands-on Debian or Ubuntu experience: apt, systemd, unattended-upgrades and major release upgrades.\n\nHands-on work with physical servers: racking, cabling, replacing components, IPMI or iDRAC, and both hardware and software RAID.\n\nNetworking fundamentals: TCP/IP, VLANs, routing, DNS, firewalls (nftables or iptables).\n\nConfiguring managed switches from at least one major vendor.\n\nConfiguration management with Ansible or a similar tool.\n\nPrometheus and Graf ana: exporters, dashboards and alerting rules.\n\nDesigning backups and testing restores.\n\nSecurity practice: hardening, patch management, access management.\n\nAdministering self-hosted CI/CD tools such as GitLab or Jenkins.\n\nEnglish good enough for documentation and daily communication.\n\nWillingness to travel to Stockholm several times a year and to do physical work such as lifting and racking servers.\nNice-to-have:\n\nEnterprise network equipment such as Juniper or Cisco.\n\nOpenVPN, WireGuard or another VPN technology.\n\nCentralized logging (ELK, Loki or Graylog).\nWhat we offer:\n\n3,000–3,500 EUR per month on a B2B contract with DomainCrawler AB, Sweden, paid in EUR.\n\n24 paid days off per year.\n\nHybrid work with flexible office days at our Wrocław office.\n\nTravel to Stockholm several times a year, with travel costs covered.","description_format":"text","description_chars":3694,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Hybrid work"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Internet Services","Information Security"],"lifecycle":[{"event":"open","at":"2026-10-29T12:21:41Z"}],"visa":[],"liveness":{"score":52,"band":"ok","label":"Likely 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