Job Title : Senior Linux Engineer

Location : Brussels - next to public transport

Contract : Freelance / long-term mission (+2 years)

About the Role

We are looking for a System Engineer to join a Sysadmins team responsible for ensuring that tailor-made infrastructure solutions for clients in the railway and mobility sector operate smoothly. You’ll work across a variety of technologies — on-premise, hybrid, and cloud — all requiring high levels of availability, continuity, and security.

Key Responsibilities

Maintain, install, and configure both hardware and software components.
Participate in migration projects, testing, debugging, and deploying updates or patches.
Ensure infrastructure and data security, while maintaining system stability.
Monitor and resolve incidents, failures, and changes to keep environments operational.
Provide second-line support, including participation in an on-call rotation.
Research and implement new technologies and tools to improve operational efficiency.
Contribute to testing, documentation, and implementation processes.
Perform on-site interventions at customer locations (31 sites across Belgium).

What We’re Looking For

Professional & Personal Skills:

Structured, precise, and detail-oriented working style.
Strong documentation mindset (writing and maintaining documentation is second nature).
Excellent team player with strong communication skills.
Knows when to work independently and when to seek support.
Able to perform under pressure.
Customer-focused, discrete, and professional in interactions with clients.
Willing to support go-live and hypercare phases (occasionally during nights or weekends).
Flexible regarding working hours and travel within Belgium.

Required Technical Skills

Strong knowledge of Linux (Red Hat) systems and scripting (bash or similar).
Solid experience with VMware, including vSphere, vCenter, and vMotion.
Basic understanding of network administration (routers, switches, VPN, firewalls).
Fluency in Dutch and French (spoken and written).
Experience in high-availability production environments.

Nice-to-Have Skills

Experience with Veeam (setup, configuration, administration).
Puppet (Open Source) administration.
Monitoring tools: Nagios, Zabbix.
Openshift and Elastic Stack (including Kibana).
Database knowledge: MySQL, PostgreSQL.
Atlassian Suite (Jira, Confluence, Git).
GIT version control.
Familiarity with Stratus and Fujitsu hardware.

If you’re passionate about IT operations, value teamwork, and want to contribute to reliable and secure infrastructure environments, we’d love to hear from you.