At Giesecke+Devrient (G+D), we develop cutting-edge technologies that protect digital and physical identities, payments, and data infrastructures. We're looking for a Middleware Engineer to join our IT Infrastructure team in El Prat de Llobregat, Barcelona to help us operate, secure, and evolve our datacenter platforms. Operate and troubleshoot infrastructure and middleware platforms. Maintain and evolve the entire datacenter stack: racks, servers, storage, communications, OS, databases, virtualization, authentication, and security. Fast learner with strong self-management skills. OS, virtualization, container orchestration (Kubernetes), SAN, etc. High level of English (spoken and written)—you’ll use it daily. Networking and firewall administration. Virtualization technologies (VMware, XEN). IBM TSM). Monitoring systems (Nagios, Thruk, SNMP). Linux server administration (especially Red Hat) and scripting. AAA servers/services (external/centralized authentication such as RADIUS, LDAP). Database operations (SQL, RDBMS—especially Oracle). Familiarity with compliance standards (PCI-DSS, ISO 27001, ITIL). Experience with observability tools (Splunk and/or ELK). Global Collaboration : Work in Agile/SCRUM teams and collaborate with stakeholders worldwide. Develop secure solutions for cutting-edge personalization and digital products. Career Development : Continuous training, coaching, and participation in talent programs. Flexible compensation (health insurance, transport, nursery vouchers, training), in-house parking. Flexible work schedule and hybrid model.