(Sr.) Linux / DevOps Engineer (f/m/d)

Zertificon Solutions – Software Manufacturer since 2004. We are IT security specialists: our products encrypt business communications. More than 25% of the 100 highest-revenue companies in Germany, as well as hundreds of medium-sized enterprises across all industries, already use our Z1 encryption solutions. We have big plans and continue to grow steadily. Nearly 140 employees are already working with us in Neukölln. Join our professional, highly qualified team: take on challenges, share your knowledge, learn new things, and discover your potential! The (Sr.) Linux / DevOps Engineer plays a pivotal role in managing Zertificon Operational Services (ZOS) platforms and environments where Zertificon products are developed, tested and run. The role ensures infrastructure health and security to guarantee smooth and uninterrupted development on our various stages. This role contributes to risk mitigation ensuring operational resilience and strengthening the company through: Proactive maintenance and monitoring of Zertificon environments ensuring their availability and full functionality.Maintenance of production and R&D hardware, supporting release process and troubleshooting pipelines.Ownership and management of our R&D smart self-service solutions. Your tasks Infrastructure & Automation Design, building and automated maintenance of Linux infrastructure (Ansible, Terraform, Bash, Python)Solve internal customer needs with infrastructure, tooling and self-serviceDevelop and extend CI/CD pipelines using JenkinsManage, troubleshoot and automate hypervisor clusters (XCP-ng) Monitoring & Maintenance Manage monitoring solutions (Prometheus, Grafana) and plan strategic alertsMaintain environments: Hardware testing, installation, patches, OS, certificates, firmware Collaboration Contribute to a team of 4-6 by sharing knowledgeReview pull requests for scripts, playbooks, manifests to safeguard code quality Your profile Strong Linux knowledgeSolid network knowledge (TCP/IP, routing, proxy) and InfoSec (TLS, certificates)Knowledge of databases (backup, restore, troubleshooting, migration)Basic datacenter expertise with firewalls, switches, routers, cabling and serversSolid understanding of virtualization (XCP-ng / XenServer a plus)Strong understanding of Ansible for configuration managementSolid understanding of Jenkins CI/CD pipelines and GitExperience with container technologies (images, registries)Excellent English language skills and effective communication Nice to have Kubernetes, Docker SwarmWork with cloud providers (Azure, AWS, Google Cloud)Experience using Terraform We offer: Flexible hours and home office optionsMobility: free Germany-wide public transport ticket, bike leasing, or parkingSubsidies for meals (e.g., delivery services) and home office internetUrban Sports Club membership for flexible fitness and wellnessOffice perks: rooftop terraces & green courtyard, organic fruit and drinks, personal packages accepted at the officeGet-togethers: monthly Pizza Friday, regular team events, big summer partyResponsible leadership: structured onboarding, regular feedback, clear goalsInnovative without startup risk: profitable for 20+ years, self-funded innovation with strong global potentialInternational team: 120+ colleagues from 30+ countries, open and collaborative culture If that resonates with you, we’d love to hear from you. Want to know more? Please have a look at our Work at Zertificon page: https://www.zertificon.com/en/it-jobs-berlin/work-at-zertificon Questions? You can reach our HR team at jobs@zertificon.com