System Administrator, Part-Time

HotelNetSolutions GmbH

. Manage and administer the Windows server environment .

Posted 10/16/2026part-timeBerlin • GermanyMid-LevelSenior💰 €40,000 - €42,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in managing Windows Server environments, Active Directory, Microsoft SQL Server, and Hyper-V, while ensuring system reliability and performance. Proficient in IT support, documentation, and compliance with IT security and PCI-related requirements, with strong communication skills in both German and English.

Highest-signal resume keywords

Windows Server AdministrationActive Directory ManagementMicrosoft SQL ServerHyper-V AdministrationIT Security Compliance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Windows Server AdministrationActive DirectoryMicrosoft SQL ServerHyper-VIISDatabase MaintenanceBackup StrategiesNetwork ManagementCloud TechnologiesTechnical Issue Analysis

Soft Skills

Independent Working StyleStructured ApproachReliable CommunicationProblem-Solving SkillsProfessional Communication

Tools & Technologies

Microsoft 365AzureLinuxDockerMongoDBPostgreSQLRedisVPN ManagementSystem MonitoringInfrastructure Documentation

Industry Keywords

IT SupportPCI ComplianceTechnical DocumentationSystem Performance MonitoringUser Management

Tech Stack

Tools & technologies

AzureCloudDockerLinuxMongoDBMS SQL ServerPostgresRedisSQL

About the role

Key responsibilities & impact

Manage and administer the Windows server environment
Ensure reliable, high-performance operation of systems
Administer Active Directory, user management, Microsoft SQL Server, Hyper-V, and IIS
Manage server certificates and VPN access
Perform database maintenance
Further develop backup strategies
Monitor system availability and performance
Analyze and permanently resolve technical issues
Provide IT support to employees
Ensure the functionality of hardware and workstations
Provide support with technical questions
Document the infrastructure
Support IT security and PCI-related requirements
Advise on the selection of new hardware, technologies, and solutions for the IT architecture
Collaborate with the development team and executive management

Requirements

What you’ll need

Completed vocational training or degree in IT, or equivalent IT expertise acquired through other means
Independent, structured, and reliable working style
Ability to investigate technical issues thoroughly and identify their root causes
Interest in modern cloud technologies and willingness to pursue professional development
German proficiency at least at C1 level
Good professional communication skills in English
Both languages are required for internal communication and documentation
Solid knowledge of Windows Server administration
Solid knowledge of Active Directory
Solid knowledge of Microsoft SQL Server
Solid knowledge of Hyper-V
Solid knowledge of IIS
Experience with networks, particularly WAN, LAN, and VPN, is an advantage
Experience with Microsoft 365, Azure, Linux (particularly Debian or Ubuntu), Docker, MongoDB, PostgreSQL, or Redis is an advantage

Benefits

Comp & perks

Permanent employment contract
25 vacation days
Part-time position, 20–25 hours per week, with the option to increase to full-time in the future
Scope to shape the role and actively contribute to the development of IT structures, technologies, and IT architecture
Direct collaboration with the development team and executive management
Broad technical environment covering Windows Server, databases, virtualization, security, and cloud technologies
Support for professional training and development
Supportive team with knowledge sharing
Hybrid working model with the office/home-office split agreed individually
No dress code
Six-month probationary period