We are looking for an Senior Infrastructure Engineer to join Sopra Steria Polska on the French project. You will support operational services for the OSS environment of a major international telecom operator. Please note that we can only offer a 5-month cooperation period to candidates who are based in Poland. The position operates within a three-shift schedule: 08:00–16:00, 09:00–17:00, and 10:00–18:00 with the project scheduled to start on November 1st, 2026. Responsibilities: System administration of Linux-based servers (Ubuntu, RHEL). Installation, maintenance, and updates of infrastructure-level software and services. Ensuring server–network communication (DNS, routing, firewalls, syslog). Automating processes using Ansible, Bash scripting, Python. Maintenance of virtualized environments (VMware). Handling incident resolution and supporting performance optimization. Participating in knowledge transfer, supervised practice, and gaining autonomy. Provide source code and support compilation, installation, and configuration within the new platform. Assist with production deployment and validate correct operation through functional testing in the new environment. Tech stack on the project: Operating systems: Linux (Ubuntu, RHEL) Networking: DNS, routing, firewall configuration, syslog servers Virtualization: VMware vSphere Automation: Ansible, Shell scripting CI/CD: GitLab CI/CD Languages: Bash, Python