Permanent / Full-time / Leipzig, Erfurt or Ilmenau (hybrid) – remote within Germany possible / Start ASAP Cuculus is looking for a hands-on senior engineer to design, build, implement and manage secure, scalable and cost-effective cloud and infrastructure environments for customer projects across cloud, on-premises and hybrid platforms. Own customer environment delivery from approved architecture through cloud provisioning, Infrastructure as Code, OpenShift/Kubernetes implementation, migration, production readiness, optimization and handover. This is not a routine Production Support role; the engineer will assist with critical customer issues requiring specialist expertise. Cloud infrastructure and services Design, deploy and manage cloud infrastructure and services across AWS, Azure or equivalent platforms, including on-premises and hybrid integrations. Configure networking, identity and access management, compute, storage, databases, load balancers, DNS, firewalls and customer connectivity. Translate approved architecture into development, UAT, staging, production, High Availability and Disaster Recovery environments. Infrastructure as Code, platforms and CI/CD Implement version-controlled Infrastructure as Code using Terraform and develop secure, reusable modules for repeatable customer environment builds. Deploy, configure and manage OpenShift and Kubernetes platforms, including networking, ingress, storage, certificates, RBAC, secrets and workload resources. Build and maintain CI/CD pipelines and cloud automation using approved tools such as Ansible, Helm, GitOps, Python and Bash/Shell. Security, resilience, monitoring and cost Apply cloud security, compliance and governance requirements across IAM/RBAC, encryption, secrets, network controls, operating systems and platform configuration. Implement backup, High Availability and Disaster Recovery practices and validate recovery against defined RTO and RPO requirements where applicable. Monitor performance, availability, security and cost; optimize scalability, resilience, capacity and cloud spending without compromising service requirements. Migrations, delivery and technical escalation Assess and support infrastructure and workload migrations, including dependencies, cutover planning, rollback, validation and post-migration stabilization. Troubleshoot complex infrastructure, cloud-platform, CI/CD and deployment issues during implementation, testing, go-live and major technical escalations. Complete production-readiness checks, acceptance evidence, knowledge transfer and formal handover; routine operational ownership remains with Production Support. Standards, collaboration and responsible AI adoption Develop cloud and infrastructure standards, architecture records, reusable modules, implementation guides, operational runbooks and support documentation. Collaborate with developers, security teams, architects, DBAs, network specialists, project teams and customers to deliver complete working environments. Use approved AI tools for IaC, pipeline development, automation, troubleshooting and documentation. Review, test and security-validate outputs and protect confidential data in line with company policy.