Linux System Administrator | On-Call & Preventive Support

Inetum is a European leader in digital services , supporting organizations as they navigate continuous technological change. The company helps clients accelerate their digital transformation through a broad portfolio that includes consulting, application services, digital engineering, cloud, cybersecurity, platforms, and infrastructure services We are looking for an experienced Linux System Administrator to join a team responsible for the operation, maintenance, and continuous improvement of critical infrastructure environments. The successful candidate will play a key role in ensuring system availability, stability, and performance while participating in preventive maintenance activities and an on-call support rotation . Key Responsibilities Administer, maintain, and support Linux-based production environments. Monitor system performance, availability, and capacity, proactively identifying potential issues. Investigate and resolve incidents, service requests, and infrastructure-related problems. Participate in preventive maintenance activities to ensure service reliability and operational excellence. Take part in an on-call rotation and provide support outside business hours when required. Manage and support database environments, preferably SQL-based. Develop and maintain scripts to automate operational and administrative tasks. Collaborate with infrastructure, application, and support teams to deliver stable and scalable solutions. Follow IT Service Management processes and best practices aligned with ITIL. Contribute to cloud, automation, and infrastructure optimization initiatives. 5+ years of experience in System Administration or Infrastructure Operations. Strong hands-on experience with Linux system administration . Solid knowledge of infrastructure operations and system support. Experience working with SQL databases . Understanding of ITIL processes and service management best practices . Knowledge of scripting for automation and task optimization , technologies such as Shell/Bash and Python . English proficiency at C1 level (written and spoken). Availability to participate in on-call and preventive support rotations . Strong communication and interpersonal skills. Nice to Have Experience with Dynatrace . Knowledge of DevOps practices and methodologies . Experience with Ansible . Experience working with Cloud platforms (AWS, Azure, or Google Cloud). Familiarity with Infrastructure as Code (IaC) concepts and automation frameworks. Soft Skills Strong problem-solving and analytical skills. Proactive attitude and ownership mindset. Ability to work independently and as part of a team. Excellent organizational and prioritization skills. Customer-oriented approach. Strong communication and stakeholder management abilities. Adaptability and willingness to learn new technologies. Location / Work Model Lisbon, Portugal - Hybrid work model This position includes participation in an on-call support rotation and preventive maintenance activities. The role offers the opportunity to work in a challenging and dynamic environment, supporting critical systems and contributing to automation and cloud transformation initiatives.