Senior IT Infrastructure & Cloud Engineer (m/f/d)

Permanent / Full-time / Ilmenau, Erfurt or Leipzig - on site, especially during the first months / Start ASAP We are looking for a Senior IT Infrastructure & Cloud Engineer to own and improve Cuculus’ IT infrastructure, Jira Cloud administration, Linux systems, operational security, and transition from VM-based hosting to Microsoft Azure. This role combines hands-on infrastructure operations with architecture, automation, security, and cloud migration responsibilities. The successful candidate will help build a reliable, secure, and increasingly cloud-based IT environment. Azure & cloud migration Lead the migration of selected virtual machines and services to Microsoft Azure. Design and maintain Azure infrastructure, including virtual networks, virtual machines, storage, identity, monitoring, backup, access controls, and cost management. Establish infrastructure-as-code and automation using tools such as Terraform, Bicep, Ansible, PowerShell, Bash, or Python. Linux & server operations Maintain and support Linux servers, virtual machines, Docker environments, and internal services. Plan and perform operating system upgrades, security updates, patching, hardening, and lifecycle management. Monitor infrastructure health, capacity, availability, backups, performance, and security vulnerabilities. Establish reliable backup, restore, disaster-recovery, and business-continuity procedures. Jira Cloud & Microsoft 365 Administer and govern Jira Cloud, including projects, workflows, permissions, roles, automations, integrations, marketplace applications, and license usage. Support Microsoft 365 and Entra ID administration, including identity, access, MFA, RBAC, and integrations. Network & security Maintain secure connectivity, DNS, certificates, VPNs, firewalls, reverse proxies, and internal network services. Support security monitoring, logging, incident investigation, vulnerability remediation, and operational security controls. Support & documentation Provide advanced technical support and act as the escalation point for complex infrastructure and access issues. Document systems, dependencies, maintenance procedures, architecture decisions, and recovery processes. Coordinate with vendors and external service providers where required. Experience & education Several years of experience in IT infrastructure, systems administration, cloud engineering, or IT operations. A degree in computer science or a related field, or an equivalent qualification. Azure & cloud migration Hands-on experience with Microsoft Azure, especially Azure VMs, networking, storage, monitoring, backup, Entra ID, RBAC, and security controls. Experience planning or executing cloud and infrastructure migrations. Linux, infrastructure & security Strong Linux administration experience, preferably with Ubuntu, Debian, or Red Hat-based systems. Practical experience with virtualization, Docker, networking, DNS, TLS certificates, SSH, firewalls, and backup systems. Strong understanding of patch management, least-privilege access, secrets management, vulnerability remediation, and secure system design. Tools & automation Experience administering Jira Cloud and integrating Jira with other systems through APIs, webhooks, or automation. Familiarity with Microsoft 365 and Entra ID. Experience with scripting and automation using Bash, PowerShell, Python, Terraform, Bicep, or Ansible. How you work Ability to troubleshoot independently and communicate clearly with technical and non-technical colleagues. Strong documentation and change-management habits. Location & language You can work on site at one of our offices in Ilmenau, Erfurt or Leipzig, especially during your first months. Our company language is English - good English skills are a must. Tools & platforms Keycloak, LDAP, or other identity platforms. MDM or endpoint-management systems. GitLab, CI/CD, container orchestration, or internal developer platforms. SIEM, log collection, monitoring, and alerting systems. Jira Service Management or Confluence administration. Frameworks & certifications ITIL, ISO 27001, GDPR, or other security/compliance frameworks. Azure certifications or Atlassian certifications. We at Cuculus believe that work should be meaningful, fun, and enable growth. When you join us, you can expect an environment that trusts you, values collaboration, and gives you the freedom to take ownership. Working model: On site in Ilmenau, Erfurt or Leipzig, especially during your first months. Flexibility: Flexible working hours & workation option (up to 4 weeks per year). Mobility: 50% subsidy for the Germany ticket and bike leasing. Security: Company pension scheme and capital-forming benefits. Culture: Short decision-making paths, open feedback culture and genuine trust. Onboarding: A structured onboarding plan and a buddy to support you from day one. Office Life: We enjoy spending time together in our offices - whether for a coffee, a shared lunch or a spontaneous after-work get-together.