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, S3 Virtualization: LXC, KVM Backup: Bacula (and derivatives) CI/CD: GitLab CI/CD Containers: Docker, Podman, containerd Web stack: Nginx, PHP, Golang, NodeJS Orchestration: Kubernetes SCM: SaltStack, Ansible VPN: OpenVPN, OpenConnect Databases: PostgreSQL, MySQL, MongoDB, ClickHouse Queue engines: RabbitMQ, Kafka Cache systems: Redis, Memcached What you will do: Manage and monitor Unix-like systems (primarily Debian/Ubuntu) Coordinate tasks with developers and other sysadmins Work with a professional and experienced sysadmin team Maintain our infrastructure across local and remote environments Communicate task scope and complexity to stakeholders and managers Adopt new technologies and implement automation to improve maintainability of our infrastructure and processes Ensure the security and reliability of systems Share 24x7 coverage of monitoring alerts in coordinated shifts with the rest of the team Must-have requirements: Degree in Computer Science or related field Solid understanding of Linux systems and network stack Experience in system administration (Debian, Ubuntu) Ability to work cross-functionally with developers, sysadmins and project managers Ability to explain complex technical tasks to non-technical stakeholders Ability and motivation to learn about new technologies and approaches Strong team collaboration skills Fluent verbal and written communication skills in English We are looking for someone ready to take full responsibility and show strong commitment to the project Nice to have (big plus): Protocols: OpenVPN, IMAP, SMTP, LDAP, DNS, TCP/IP, OSPF Knowledge of TLS/x509 certificates, encryption basics Hands-on experience running Kubernetes in bare-metal environments Hands-on experience with SCM tools (SaltStack/Ansible) Experience with monitoring and logging tools Familiarity 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 systems Communication skills in Russian What we offer: Simple hiring process B2B or UoP, you can choose any (via our partner CVT services) Stable salary, paid twice a month Free lunches Participation in external training and conferences (75% covered) 14 days of remote work per year Sick leave paid up to 100% of the salary Supportive and friendly environment Team events and company activities Swiss management: horizontal hierarchy, decisions made by the project team, developers gain experience in different roles from project to project No bureaucracy - direct contact with management