System administrator in Poland

XIAGis an international IT company that has been creating mobile and web applications for Swiss businesses in the B2B and B2C sectors for 25 years.Our projects cover a variety of industries, such as B2B platforms for food products, airlines, banks, travel portals, and more. Our partnerships with clients typically last 7-8 years or more.Location: Mokotowska 9, 00-640 WarszawaTech stack we use (experience with any of these is a plus):Network storage: DRBD, Ceph, S3Virtualization: LXC, KVMBackup: Bacula (and derivatives)CI/CD: GitLab CI/CDContainers: Docker, Podman, containerdWeb stack: Nginx, PHP, Golang, NodeJSOrchestration: KubernetesSCM: SaltStack, AnsibleVPN: OpenVPN, OpenConnectDatabases: PostgreSQL, MySQL, MongoDB, ClickHouseQueue engines: RabbitMQ, KafkaCache systems: Redis, MemcachedWhat you will do:Manage and monitor Unix-like systems (primarily Debian/Ubuntu)Coordinate tasks with developers and other sysadminsWork with a professional and experienced sysadmin teamMaintain our infrastructure across local and remote environmentsCommunicate task scope and complexity to stakeholders and managersAdopt new technologies and implement automation to improve maintainability of our infrastructure and processesEnsure the security and reliability of systemsShare 24x7 coverage of monitoring alerts in coordinated shifts with the rest of the teamMust-have requirements:Degree in Computer Science or related fieldSolid understanding of Linux systems and network stackExperience in system administration (Debian, Ubuntu)Ability to work cross-functionally with developers, sysadmins and project managersAbility to explain complex technical tasks to non-technical stakeholdersAbility and motivation to learn about new technologies and approachesStrong team collaboration skillsFluent verbal and written communication skills in EnglishWe are looking for someone ready to take full responsibility and show strong commitment to the projectNice to have (big plus):Protocols: OpenVPN, IMAP, SMTP, LDAP, DNS, TCP/IP, OSPFKnowledge of TLS/x509 certificates, encryption basicsHands-on experience running Kubernetes in bare-metal environmentsHands-on experience with SCM tools (SaltStack/Ansible)Experience with monitoring and logging toolsFamiliarity with CI/CD pipelines and related tooling (Jenkins, ArgoCD, GitLab CI/CD)Familiarity with distributed systems (ClusterEngine: Corosync, Pacemaker)Hands-on experience with software defined networking-based systemsCommunication skills in RussianWhat we offer:Simple hiring processB2B or UoP, you can choose any (via our partner CVT services)Stable salary, paid twice a monthFree lunchesParticipation in external training and conferences (75% covered)14 days of remote work per yearSick leave paid up to 100% of the salarySupportive and friendly environmentTeam events and company activitiesSwiss management: horizontal hierarchy, decisions made by the project team, developers gain experience in different roles from project to projectNo bureaucracy - direct contact with management