System Administrator (m/f/d) Part-time/Mini-job or Working Student - Karlsruhe

9 Minutes ago • All levels • System Admin

Job Summary

Job Description

At Knuddels, we aim to make social networks truly social by fostering genuine human connection. As a System Administrator, you will be crucial in maintaining our stable technical infrastructure, overseeing our data center and office systems, including Kubernetes clusters, server hardware, VPN, and Wi-Fi. You'll ensure smooth operations, manage clusters, support office IT, monitor system metrics, and onboard new team members, contributing to a unique community platform.
Must have:
  • Responsible for the smooth operation of approximately 100 Linux (Ubuntu LTS) servers.
  • Manage internationally distributed Apache Cassandra and Kubernetes clusters on bare-metal servers.
  • Support cloud backup management.
  • Ensure smooth operation of office network and hardware, including printers.
  • Monitor system metrics using Prometheus and Grafana to identify bottlenecks.
  • Proactively act on problems before they escalate.
  • First point of contact for new team members, handling technical onboarding and offboarding.
Good to have:
  • Experience in Linux, system administration, databases.
Perks:
  • Individual career development path (specialist or leadership).
  • Open culture with honest, constructive exchange, strong cohesion.
  • Team support through discussions, coaching, feedback, and mentoring.
  • Flat hierarchies and co-determination; active participation and idea contribution.
  • Flexible work: home office, spontaneous doctor's appointments, short-term vacation.
  • Office in a prime location with breakfast, fitness, mystery lunch, workshops, and a beautiful rooftop terrace.
  • Direct feedback from end-users (B2C Company).
  • Focus on own product: unique community platform.

Job Details

Job Description

At Knuddels, we have set ourselves the goal of making social networks truly social again – with genuine human connection instead of mere content consumption. Our mission: We bring people closer together. For this mission to succeed, we need a stable technical foundation. This is where you come in: as a System Administrator, you take command of our digital engine room. You and your team are responsible for our infrastructure in the data center and in our office, from Kubernetes clusters and server hardware to company VPN and high-performance office Wi-Fi, everything is included.

Your Tasks

  • Core Systems Operator: As part of our Operations team, you are jointly responsible for the smooth operation of our approximately 100 Linux (Ubuntu LTS) servers and thus become the rock in the surf of our IT landscape.
  • Cluster & Cloud Commander: You gain valuable practical experience in managing our internationally distributed Apache Cassandra Cluster and our Kubernetes Cluster on bare-metal servers. You also support us with cloud backup management.
  • Infrastructure Hero: You ensure that everything runs smoothly in the office, from the network to the hardware. Your mission, should you choose to accept it: Conquer the final boss – our printer. Don't worry, we also provide emotional support and celebrate your heroic deeds.
  • Guardian of the Metrics: With tools like Prometheus and Grafana, you always keep an eye on our system metrics. You help the team identify bottlenecks early and ensure that we can act proactively on problems before they escalate.
  • Onboarding-Captain: You are the first point of contact for new team members and ensure a smooth start. You take over the technical onboarding and offboarding and ensure that new companions are well-equipped from day one.
  • Level Up Your Skills: We provide thorough training and experienced mentors. You play a significant role in determining which skills you develop during your time with us and in which areas you want to advance your career.

What do we offer you?

  • Growth according to your ideas - Whether a specialist or leadership career: with us, you shape your individual development path.
  • Team support through discussions, coaching, feedback, and mentoring - We live an open culture with honest, constructive exchange and strong cohesion.
  • Flat hierarchies and co-determination - Every voice counts with us: actively participate and contribute your ideas.
  • Flexibility that adapts to your life - Home office, spontaneous doctor's appointments, or short-term vacation: we rely on self-organization.
  • Office in a prime location with breakfast, fitness, mystery lunch, workshops and beautiful rooftop terrace - Our work environment offers everything for well-being and creative energy.
  • Direct feedback from end-users (B2C Company) - You see directly how your contribution is received by our users.
  • Focus on our own product - A unique community platform that brings people closer together, with meaning and impact.
  • All benefits can also be found at jobs.knuddels.de

What do we not offer?

  • Dusty corporate structures
  • Working on business customer projects (We are a B2C company)
  • A far-fetched third bullet point, if we can only think of two :)

Job Requirements

  • You are enthusiastic about operating large server landscapes and bring a degree, comparable training, or private/professional practical experience and interest in this area.
  • Ideally, you have already gained experience in Linux, system administration, databases, etc.
  • You have strong analytical intelligence.
  • You show great ambition to learn new topics.

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About The Company

Seit 1999 bringt unsere Chat-Plattform Menschen näher zusammen. Mit über 300.000 monatlich aktiven Mitgliedern in mehr als 1.000 Chaträumen ist Knuddels Deutschlands größte Chat-Community. In einer schnelllebigen, wettbewerbsintensiven Branche setzen wir auf Offenheit, Vielfalt und Inklusion – und auf ein starkes Team. Unser Ziel: Ein Produkt, das Menschen verbindet und ihnen gute Erlebnisse und echte Glücksmomente schenkt.

Karlsruhe, Baden-Württemberg, Germany (Remote)

Karlsruhe, Baden-Württemberg, Germany (Remote)

Karlsruhe, Baden-Württemberg, Germany (Remote)

Karlsruhe, Baden-Württemberg, Germany (Remote)

Karlsruhe, Baden-Württemberg, Germany (Remote)

Karlsruhe, Baden-Württemberg, Germany (Remote)

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