Drupal Middleware Administrator Senior

Inetum is a European leader in digital services. Inetum’s team of 27,000 consultants and specialists strive every day to make a digital impact for businesses, public sector entities and society. Inetum’s solutions aim at contributing to its clients’ performance and innovation as well as the common good. Present in 19 countries with a dense network of sites, Inetum partners with major software publishers to meet the challenges of digital transformation with proximity and flexibility. Driven by its ambition for growth and scale, Inetum generated sales of 2.4 billion euros in 2024.

We are looking for a Senior Drupal Platform Infrastructure Engineer to support and evolve mission-critical Drupal platforms on Ubuntu Linux. This role suits an experienced L3 infrastructure specialist with strong expertise in Linux, Drupal platform operations, security, automation and performance, ensuring reliability and continuity across complex web ecosystems.

Responsibilities:

• Design and evolve Drupal platform architectures on Ubuntu Linux, ensuring high availability, performance and resilience;
• Perform advanced L3 administration, troubleshoot complex incidents and lead root-cause analysis across Drupal, Linux, web server, caching, load balancing, search and storage layers;
• Review, assess and approve Drupal modules from an operational, performance, security and maintainability perspective;
• Monitor security advisories across Drupal Core, contributed modules, Linux, Apache/NGINX, Varnish, HAProxy, Solr and supporting components, prioritizing vulnerabilities and coordinating remediation;
• Optimize platform performance across all layers, including Drupal runtime, web servers, caching, load balancing, search, OS, database interactions, storage and network;
• Define and maintain secure operational procedures, enforcing least-privilege access, controlled deployments and auditable change processes;
• Lead major changes such as upgrades, migrations, module lifecycle updates and architecture redesigns, ensuring safe deployments and proper documentation;
• Develop automation scripts and contribute to CI/CD pipelines to industrialize deployments, configuration management, cache operations, validation, health checks and rollback procedures;
• Manage GitLab-based release processes, ensuring deployments are secure, automated, repeatable and consistent across environments;
• Administer Ubuntu Linux servers hosting Drupal workloads, including patching, upgrades, hardening, capacity planning and OS-level troubleshooting;
• Support disaster recovery, business continuity and platform stability through proactive monitoring, capacity management and operational governance;
• Collaborate with development, Linux, database, network, security and observability teams to translate operational requirements into automated and supportable platform solutions;
• Contribute to observability initiatives, supporting Grafana dashboards, Prometheus metrics, Loki logs and operational KPIs, SLOs and alerting;
• Produce and maintain technical documentation (HLD/LLD, runbooks, procedures, deployment guides) and enrich internal knowledge bases.

• 5-10+ years of experience in Linux platform engineering or Drupal infrastructure operations within production environments;
• Strong background in Drupal platform architecture, module governance, lifecycle management and operational stability;
• Experience working in multi-customer or service-center environments (MSP/outsourcing) is highly valued;
• Advanced expertise in Ubuntu Linux, Apache/NGINX, Varnish, HAProxy, Solr and enterprise web hosting components;
• Solid knowledge of HA, caching, load balancing, search, configuration management and controlled deployment strategies;
• Strong skills in performance analysis, bottleneck identification, capacity monitoring and root-cause troubleshooting across multi-layer web platforms;
• Proficiency in automation and scripting (Bash, Shell, Python, Ansible) and contribution to CI/CD pipelines (GitLab);
• Knowledge of security best practices: vulnerability management, hardening, CVE assessment, auditing and compliance frameworks;
• Ability to manage priorities, remain calm under pressure and perform effectively in on-call situations;
• Strong communication skills and ability to collaborate with cross-functional technical teams;
• Organized, autonomous, customer-oriented and comfortable working in demanding, SLA-driven environments;
• Fluent English required; French or Dutch are considered a plus.