IT System Administrator (w/m/d) im B2B Software-Unternehmen

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!

Your tasks

• Planning, installing, configuring, maintaining, and optimizing IT infrastructure and existing systems
• Administration of server environments (Windows & Linux), including updates, patch management, and upgrades
• Operation and development of virtualization environments (e.g. VMware, Hyper‑V) and Docker‑based infrastructures
• Monitoring, analyzing, and resolving incidents, alerts, and system issues
• Documentation of system configurations and operational procedures

Your profile

• At least 2 years of experience as an IT System Administrator
• Strong expertise in Windows Server environments and experience with Linux server administration (e.g. Ubuntu, Debian, CentOS)
• Experience with virtualization platforms (VMware, Hyper‑V, or similar) and solid knowledge of Docker/containerization
• Strong analytical thinking and troubleshooting skills
• Basic understanding of cyber security principles
• German and English language skills at minimum B2

We offer

• Flexible working hours and home office possible
• Mobility: free Germany ticket, job bike leasing or car parking
• Allowances for food (e.g., Lieferando) and internet in the home office
• Benefits in the office: Roof terraces & green courtyard, organic fruit and drinks, parcel acceptance
• Get‑together: pizza Friday in the office, regular team events, big summer party