IT System Administrator

Guardsquare

SUMMARY If you’ve ever built your own PC, run a home lab, broken something just to figure out how it works, or spent hours tuning a setup until it’s just right, you’ll probably feel at home here. We’re looking for a mid-level IT System Administrator who brings a solid foundation and is eager to keep learning and growing. You should be comfortable getting up to speed quickly, contributing early, and taking on more ownership over time. This role sits between helpdesk and systems: part hands-on support, part infrastructure. You’ll work across a global environment covering Unix/Linux systems, networking, cloud infrastructure, and multi-OS endpoints, with a particular opportunity to strengthen our Windows capabilities. How your time is split: roughly 60% infrastructure and automation, 30% hands-on employee support and onboarding, and 10% security and compliance work. This is a hands-on role with real ownership: not ticket-only support, and not a pure architecture role. This role requires being in the Leuven office 4 days per week, with the potential for more flexibility as the team grows. Candidates must be legally authorized to work in Belgium at the time of application. Please note that we are unable to provide visa or work permit sponsorship for this role. WHAT YOU’LL DO INFRASTRUCTURE & AUTOMATION (60%) * Maintain and improve our on-premise and cloud infrastructure (Proxmox virtualization on Dell servers, Google Cloud Platform, networking) * Administer systems and services across Linux/Unix and Windows environments * Deploy, monitor, and troubleshoot containerized services and build environments using Docker * Write and maintain Python scripts and use tools like Ansible to automate provisioning, configuration, and repetitive tasks * Monitor system performance and network health (TCP/IP, DNS, DHCP), resolving issues to minimize downtime * Track IT assets, hardware inventory, and software licenses, and keep technical documentation accurate SUPPORT & ONBOARDING (30%) * Serve as a hands-on IT point of contact for a global team, providing on-site and remote support across macOS, Linux, Windows, and mobile devices * Execute onboarding and offboarding (accounts, devices, access), with the goal of continuously improving and automating workflows through MDM tooling (Mosyle, Intune, NinjaOne) * Manage configurations and integrations for collaboration tools such as Google Workspace, Slack, GitHub, and Atlassian * Be a dependable go-to for day-to-day technical issues and employee support SECURITY & COMPLIANCE (10%) * Manage and test backups, disaster recovery, and business continuity procedures * Implement security measures including access controls, patch management, and event logging * Support IAM practices, vulnerability remediation, audits, incident response, and access reviews ENVIRONMENT Cloud: Google Cloud Platform On-prem: Proxmox on Dell servers Endpoints: macOS, Linux, Windows, mobile Device management: Intune, Mosyle, NinjaOne Tooling: Docker, Python, Slack, Google Workspace WHAT WE’RE LOOKING FOR * ~3–5 years of hands-on experience across IT support and system administration * Comfortable operating across both helpdesk and infrastructure work (not siloed into one) * Comfortable administering a multi-OS environment (Linux/Unix, macOS, Windows), with the motivation to deepen your skills where you’re less experienced * Solid Windows skills are a particular plus * Working knowledge of networking (TCP/IP, DNS, DHCP) and confidence troubleshooting it * Experience with endpoint/device management (any modern MDM) * Some scripting or automation experience (Python preferred) and the motivation to grow it * Able to troubleshoot independently and follow through to resolution * A service mindset: clear communicator, reliable, and easy to work with * Comfortable switching between deep technical work and helping a new hire get set up * Curious, hands-on, and motivated to learn and grow * Fluent in English * Candidates must be legally authorized to work in Belgium at the time of application. Please note that we are unable to provide visa or work permit sponsorship for this role. NICE TO HAVE * Production experience with Docker, Proxmox/VMware, or GCP * Experience with Ansible or other configuration management tools * Familiarity with security frameworks and practices (ISO 27001, CIS, IAM, audits) * Relevant certifications (CompTIA A+/Network+/Security+/Linux+, GCP, or similar) * Experience supporting development teams in a software or scale-up environment WHAT GUARDSQUARE OFFERS YOU * A full-time job with a competitive salary package. * You are provided with the tools & flexibility to develop yourself successfully. * An international environment where you will interact with motivated & open colleagues from different backgrounds. * A workplace where you can share and implement your ideas. * A hybrid work policy, which helps guarantee an excellent work-life balance. At Guardsquare, we take pride in being a diverse and multicultural company with team members representing numerous nationalities. We value different perspectives and opinions throughout the business which has contributed to our being the market leader in mobile application security.  You will be part of a dynamic team that strives for excellence and focuses on continuous education and enhancement in skills. We encourage & empower our trusted colleagues to share their opinions, actively collaborate, and continue to learn and grow. So, what are you waiting for? Join us!  You can apply for this opportunity by filling out the application form below!  ABOUT GUARDSQUARE Guardsquare offers the most complete approach to mobile application security on the market, delivering the highest level of protection, with ease. Guardsquare integrates seamlessly across the full development cycle, from mobile app security testing and code hardening to real-time threat detection and API security. Guardsquare provides enhanced mobile application security across the entire development process. More than 1,000 customers worldwide across all major industries rely on Guardsquare to help them identify security risks and protect their mobile applications and SDKs against reverse engineering and tampering in the ever-evolving threat landscape. Guardsquare is based in Leuven (Belgium), with offices in Gent (Belgium), Boston (USA) and Munich (Germany).

IDnow

IDnow is a leader in digital identity and fraud prevention in Europe with a mission to transform trust into the most powerful asset in the digital world, empowering enterprises with AI-driven, SaaS-based identity solutions that deliver scalable security, adaptive compliance, and real-time fraud prevention. Through its broad portfolio of digital identity and fraud prevention solutions, IDnow establishes, maintains and enriches trust throughout the customer journey, ensuring businesses can confidently and securely operate while leveraging digital identity to drive growth, security and scalability. The company has offices in Germany, United Kingdom, Romania and France, and is backed by renowned institutional investors, including Corsair Capital and Seventure Partners. Its portfolio of international clients spans a wide range of end markets including financial services, telecommunications, travel & mobility, gaming, and other industries. This position is based in Rennes, France. IDnow France is strengthening its in-house IT team and is looking for its future System Administrator. As part of a team split between France and Germany, you will be involved in providing support for our internal teams.   KEY RESPONSIBILITIES   This is a truly multi-skilled position covering a wide range of technical subjects: internal infrastructure, workstations, technical environments (Linux/Windows), security projects, etc. Here are a few examples: * Support for overhauling and securing the internal IT infrastructure * Participation in IDnow inter-team projects (France, Germany & Romania) * Implementing common tools and processes at group level * You will be responsible for maintaining the internal IS in operational condition * N1/N2/N3 support for internal incidents * MCO of internal IT tools (Microsoft Active directory, LDAP, Microsoft Azure, MS O365, JIRA, Confluence, Gitlab, etc.) * Administration of the company network (firewall, wifi, etc.)   PREFERRED EXPERIENCE   With at least 3 years' experience in a similar position, you are organized and a good communicator and are used to working in a team. * Mastery of Linux "Debian/Ubuntu" & Windows "10/11" environments. * Experience of hosting and infrastructure issues. * Knowledge of networks, routing, switching and firewalls * Professional level in both French and English (written and spoken), you feel able to work in an international context. Experience we would like to see (but which can be improved / acquired): * Virtualisation environments: Proxmox * Desktop management tools: Puppet, Salt and/or Intune * Experience in an ISO27001 environment   PERKS & BENEFITS * Health & Wellbeing: Use your full access to the mental health platform nilo, including 1on1 sessions. * We value personal and professional development: make full use of Udemy, our training platform with 24/7 access and unlimited content/course consumption incl. certification. * We make your remote work comfy: we provide support on equipment and offer flexible working hours. * We value collaboration & love to come together: regular onsite gatherings, internal initiatives and summer parties to connect outside of work. * May your family require your attention or other reasons apply: use the benefit of our paid special leave days. * Enjoy the possibility to combine work with a longer stay at your holiday destination or extend a weekend with our Workcation possibilities. * In addition to the perks & benefits above, we offer specific benefits that differ between our locations.   IDnow applies the principles of non-discrimination and equality: We strive to establish, maintain, and promote an open and inclusive recruitment process and working environment by respecting the principles of equal opportunities. Including but not limited to: sex, race or ethnic origin, religion or convictions, gender identity, citizenship, marital status, disability, age, or sexual orientation.

adorsys

WER WIR SIND Wir sind ein buntes Team aus begeisterten Softwareentwickler*innen und Architekt*innen, die gern über den Tellerrand hinausschauen und sich stetig weiterentwickeln. Als IT System Administrator bist du für den reibungslosen Betrieb unserer internen IT-Landschaft mitverantwortlich. Du sorgst dafür, dass unsere Mitarbeitenden optimal arbeiten können, bringst eigene Ideen zur Weiterentwicklung unserer IT-Infrastruktur ein und übernimmst Verantwortung für moderne Systeme und Prozesse. Dabei arbeitest du eng mit Kolleginnen und Kollegen aus unterschiedlichen Fachbereichen zusammen und trägst aktiv zu einer sicheren, stabilen und zukunftsfähigen IT-Umgebung bei. Wir pflegen eine kollegiale Firmenkultur, kurze Entscheidungswege und ein dynamisches Arbeitsumfeld, in dem Eigeninitiative und Wissensaustausch ausdrücklich erwünscht sind. Zu deinen internen Stakeholdern gehören unter anderem unsere Mitarbeitenden, Führungskräfte, HR, Finance, Security sowie unsere Software- und Consulting-Teams. WAS DICH ERWARTET * Regelmäßige Präsenz in Nürnberg wird vorausgesetzt, Homeoffice ist möglich * Verantwortung für den stabilen, sicheren und leistungsfähigen Betrieb unserer IT-Infrastruktur * Administration und Weiterentwicklung unserer Linux-Systemlandschaft * Betreuung und Verwaltung unserer Microsoft-365-Umgebung inklusive Entra ID, Exchange Online, Teams und Intune * Konfiguration, Betrieb und Optimierung von Netzwerkkomponenten wie Router, Switches, Firewalls und Access-Points * Weiterentwicklung von Netzwerksegmentierung, VPN-Verbindungen und Sicherheitskonzepten * Aufbau, Betrieb und Pflege containerbasierter Umgebungen mit Docker und Docker Compose * Automatisierung wiederkehrender Betriebsaufgaben mit Skripten und geeigneten Tools * Unterstützung bei Monitoring, Logging, Backup- und Recovery-Prozessen * Mitarbeit im 1st- und 2nd-Level-Support sowie lösungsorientierte Unterstützung unserer Anwender:innen * Nutzung moderner KI-Tools wie ChatGPT, Copilot oder vergleichbarer Assistenten zur effizienteren Bearbeitung von Betriebs-, Analyse- und Dokumentationsaufgaben * Modernes, technisch anspruchsvolles Arbeitsumfeld mit aktueller Infrastruktur; flache Hierarchien und kurze Entscheidungswege WAS WIR VON DIR ERWARTEN * Abgeschlossene IT-Ausbildung in der Systemintegration, ein Studium mit IT-Bezug oder eine vergleichbare, mehrjährige praktische Qualifikation * Einschlägige, mehrjährige Berufserfahrung in der Systemadministration, idealerweise mit Schwerpunkt Linux und Infrastruktur * Gute Kenntnisse in Linux, Microsoft 365 und der Administration moderner IT-Umgebungen * Praktische Erfahrung in der Netzwerkadministration mit Routern, Switches, Firewalls, WLAN und VPN * Erfahrung mit Docker, Containerisierung und idealerweise ersten Berührungspunkten mit Kubernetes oder K3s * Know-how in Scripting und Automatisierung, zum Beispiel mit Bash, Python, PowerShell oder Ansible * Verständnis für Monitoring, Logging, Backup, Incident- und Change-Management * Sicherer Umgang mit Ticketsystemen, technischer Dokumentation und serviceorientierter Anwenderkommunikation * Vorzuweisende Zertifikate im Bereich Linux, Microsoft und Docker wünschenswert * Offenheit für den produktiven und verantwortungsvollen Einsatz von KI-Tools im IT-Betrieb * Analytisches Denken, strukturierte Arbeitsweise, Eigenverantwortung, Hands-on-Mentalität und Teamfähigkeit * Deutsch fließend in Wort und Schrift (C2) sowie Englisch C1 WAS WIR DIR BIETEN * Innovatives, modernes und anspruchsvolles Arbeitsumfeld mit flachen Hierarchien und der Möglichkeit, eigene Stärken individuell einzubringen * Langfristige berufliche Perspektiven * Attraktive Entlohnung * Flexible Arbeitszeiten und Home-Office * Modernes Arbeitsumfeld in coolen Büros, in denen wir auch auf deine Gesundheit achten, z. B. durch ergonomische Stühle, höhenverstellbare Tische und frisches Obst * Hochwertige Hardware deiner Wahl * Jährliche Weiterbildungen, die du selbst gestalten darfst (von Fachseminaren bis hin zur Teilnahme an internationalen Konferenzen) Zahlreiche Benefits: * VGN-Firmenabo (Zuschuss öffentliche Verkehrsmittel) * JobRad * Kinderbetreuungszuschuss * Corporate Benefits, Einkaufsrabatte, Sportrabatte (z. B. Compustore, Urban Sports uvm.) * Zuschuss zur Betrieblichen Altersvorsorge / VWL * Getränke, Müsli, Obst am Arbeitsplatz Du fühlst dich angesprochen? Dann bewirb dich jetzt bei adorsys! DEINE ANSPRECHPARTNER Maria Hurtig