<div class="show-more-less-html__markup show-more-less-html__markup--clamp-after-5 relative overflow-hidden"> <p>NAXCON GmbH, headquartered in Weil am Rhein with additional offices, including Stuttgart, is one of Germany's leading engineering and IT service providers.</p><p>Our experts possess extensive expertise in software and hardware development, modern electronics, and cutting-edge technologies such as Artificial Intelligence (AI).</p><p>In addition to delivering high-quality engineering solutions for our customers, we are passionate about driving our own innovation projects as well as research and development activities. Renowned companies from a wide range of industries place their trust in our expertise, reflecting the outstanding knowledge, professionalism, and commitment of our engineers.</p><p><br/></p><p><strong>Position</strong>: Senior System Administrator – Secure Messaging</p><p><strong>Location</strong>: Berlin, Germany</p><p><strong>Field</strong>: Defence</p><p><strong>Type</strong>: Full-time / 50-75% Remote</p><p><br/></p><p><strong>Project and Service Environment</strong></p><p><br/></p><p>The position is part of a secure messaging operations team responsible for providing and operating the backend infrastructure of a Matrix protocol-based enterprise messenger platform.</p><p>The team ensures the stable, secure, and highly available operation of the messaging environment. Its responsibilities include maintaining backend components, ensuring the availability of functions and interfaces, performing cross-functional incident analysis, and providing second-level support.</p><p>A current focus of the team is the automation of operational processes and the improvement of root-cause analysis during live operations.</p><p><br/></p><p><strong>Responsibilities</strong></p><p><br/></p><p>The Senior System Administrator will be responsible for:</p><p><br/></p><ul><li>Installing, configuring, commissioning, administering, and monitoring the secure messaging infrastructure.</li><li>Operating the infrastructure in accordance with current security requirements and internal operational standards.</li><li>Administering Red Hat-based Linux servers.</li><li>Performing advanced troubleshooting and root-cause analysis in live production environments.</li><li>Monitoring the availability, performance, capacity, and threshold values of IT services and infrastructure resources.</li><li>Taking corrective action in the event of performance bottlenecks or availability issues.</li><li>Supporting the achievement of agreed service levels and operational targets.</li><li>Updating, maintaining, and improving technical and operational documentation.</li><li>Automating recurring operational processes using technologies such as Ansible, Bash, and PowerShell.</li><li>Implementing approved infrastructure changes within established change and release management processes.</li><li>Following standard operating procedures during releases, deployments, and configuration changes.</li><li>Recording infrastructure changes in the relevant configuration management databases.</li><li>Analysing and resolving incidents and service requests escalated by first-level support.</li><li>Performing detailed remote troubleshooting to identify underlying technical causes.</li><li>Communicating with affected users or stakeholders when further information or coordination is required.</li><li>Documenting solutions and troubleshooting procedures in the knowledge base.</li><li>Supporting continuous improvement of operational procedures, automation workflows, and incident analysis methods.</li><li>Working with infrastructure, network, security, application, and support teams to resolve cross-functional technical issues.</li></ul><p><br/></p><p><strong>Required Qualifications</strong></p><p><br/></p><p>The candidate should have:</p><p><br/></p><ul><li>Successfully completed vocational training or a university degree in information technology, computer science, system integration, or a comparable discipline.</li><li>Alternatively, at least five years of relevant professional experience supported by suitable technical qualifications.</li><li>A valid IT service management certification at ITIL Foundation level.</li><li>A valid Linux administration certification at LPIC-1 level or higher.</li><li>Relevant certificates must be valid at the time of application.</li><li>Equivalent evidence may be accepted where formal certificates cannot be provided, provided that equivalence can be demonstrated.</li></ul><p><br/></p><p><strong>Required Professional Experience</strong></p><p><br/></p><p>The candidate must have:</p><p><br/></p><ul><li>At least five years of professional experience in system administration.</li><li>At least five years of substantial practical experience with Linux systems and network technologies.</li><li>At least two years of practical experience administering Matrix-based messenger platforms.</li><li>At least two years of practical experience with infrastructure and operations automation using Ansible, Bash, PowerShell, or comparable tools.</li><li>Experience administering Red Hat or comparable enterprise Linux environments.</li><li>Experience operating business-critical or security-sensitive backend services.</li><li>Experience with availability, performance, capacity, and service-level monitoring.</li><li>Experience with incident, problem, change, release, and configuration management.</li><li>Experience handling second-level support tickets and complex technical escalations.</li><li>Experience maintaining configuration data, technical documentation, and knowledge base articles.</li><li>Experience coordinating technical issues across infrastructure, network, security, application, and support teams.</li></ul><p><br/></p><p>The required experience should represent continuous, repeated, and substantial work in the relevant subject area rather than isolated or occasional assignments.</p><p><br/></p><p><strong>Technical </strong>Skills</p><ul><li>Linux administration</li><li>Red Hat Enterprise Linux</li><li>Matrix protocol</li><li>Matrix-based messenger administration</li><li>Secure messaging infrastructure</li><li>Network fundamentals and troubleshooting</li><li>Ansible</li><li>Bash scripting</li><li>PowerShell</li><li>Infrastructure automation</li><li>System monitoring</li><li>Capacity management</li><li>Availability management</li><li>Performance monitoring</li><li>Threshold monitoring</li><li>Incident management</li><li>Problem management</li><li>Root-cause analysis</li><li>Change management</li><li>Release management</li><li>Configuration management</li><li>Configuration management databases</li><li>Second-level support</li><li>Remote troubleshooting</li><li>Knowledge base management</li><li>Technical documentation</li><li>IT service management</li><li>ITIL processes</li><li>Security-conscious system operation</li></ul><p><br/></p><p><strong>Language Requirements</strong></p><p><br/></p><ul><li><strong>German</strong>: C1 according to CEFR</li></ul><p><br/></p><p>Native German speakers do not need to provide separate language certification. For other candidates, the language level should be demonstrated through the CV and a recognised certificate or equivalent evidence.</p><p><br/></p><p><strong>Required Soft Skills</strong></p><p><br/></p><p>The candidate should demonstrate:</p><p><br/></p><ul><li>Strong ability to explain complex technical topics clearly and understandably.</li><li>Excellent structured troubleshooting and root-cause thinking.</li><li>High quality awareness.</li><li>Strong accuracy and attention to detail.</li><li>A systematic and analytical working style.</li><li>Ability to work independently in production environments.</li><li>Strong documentation discipline.</li><li>Clear and professional communication with users, technical teams, and stakeholders.</li><li>Ability to remain calm and solution-oriented during incidents and service disruptions.</li><li>Strong collaboration skills across different technical disciplines.</li><li>Reliability when implementing changes in security-sensitive environments.</li></ul><p><br/></p><p><strong>Travel and Working Model</strong></p><p><br/></p><ul><li>Willingness to travel for up to approximately 10% of working time is required.</li><li>Travel may be undertaken by private car, rental car, train, or other public transport.</li><li>The expected remote-working proportion is approximately 50–75%, depending on operational requirements.</li><li>On-site presence may be required for commissioning, troubleshooting, releases, security-related activities, workshops, or team coordination.</li></ul><p><br/></p><p><strong>Security-Related Requirements</strong></p><p><br/></p><ul><li>Candidate profiles must include nationality information.</li><li>Applicable security-related country-list restrictions must be observed.</li><li>Country-specific travel or security restrictions may apply even where no formal security clearance is required.</li><li>Eligibility for deployment in a security-sensitive environment must be confirmed before assignment.</li><li>Failure to meet the applicable security requirements may result in exclusion from the recruitment process.</li></ul><p><br/></p><p><strong>Project Reference Requirements</strong></p><p><br/></p><p>Where project references are required, each reference should include:</p><p><br/></p><ul><li>Industry</li><li>Project title</li><li>Short project description</li><li>Duration of the candidate's assignment</li><li>Detailed description of the candidate's responsibilities and activities</li><li>Linux and network administration scope</li><li>Matrix-based messenger administration experience</li><li>Automation activities using Ansible, Bash, PowerShell, or comparable technologies</li><li>Incident, change, release, and configuration management responsibilities</li><li>Second-level support and troubleshooting activities</li></ul><p><br/></p><p><strong>What we offer:</strong></p><p><br/></p><ul><li>International Working Environment: Join a diverse and multicultural team where people from different backgrounds and cultures collaborate to achieve outstanding results.</li><li>German Language Development: Whether you are a beginner or an advanced speaker, we provide a supportive environment to help you improve your German language skills.</li><li>Dedicated Point of Contact: You will have a personal contact within the company who will support and guide you throughout your employment.</li><li>Professional Growth: Our engineers have the opportunity to work on exciting projects across different industries, continuously expanding their expertise and developing new skills.</li><li>Regular Team Events: We organize regular company events to strengthen team spirit, encourage collaboration, and create a positive working atmosphere.</li><li>Competitive Compensation: We value our employees and offer an attractive compensation package that reflects your qualifications, experience, and performance.</li></ul><p><br/></p><p><strong>Note</strong></p><p><br/></p><ul><li>Travel expenses for on-site interviews are covered by the candidates themselves.</li></ul> </div>