System Administrator

Your mission

As our On-Premises DevOps Engineer, you will be the cornerstone of our technical infrastructure, ensuring the reliability, security, and efficiency of our on-premises systems. You’ll bridge the gap between development and operations, implementing automation to streamline workflows while maintaining robust security protocols. Your expertise will help us build resilient systems that support our business goals while minimizing downtime and optimizing performance.

Your profile

Key Responsibilities

• Design, implement, and maintain secure network infrastructure, including firewall configuration and management
• Provide multi-tiered technical support (1st, 2nd, and 3rd layer) for infrastructure-related issues
• Deploy and manage virtualization and containerization platforms to optimize resource utilization
• Implement Infrastructure as Code (IaC) practices to ensure consistent, reproducible infrastructure deployments
• Build and maintain CI/CD pipelines to automate software delivery processes
• Administer Linux servers and ensure their security, performance, and availability
• Configure and optimize reverse proxy solutions for our web applications
• Manage NAS systems for reliable data storage and backup solutions
• Implement comprehensive logging, monitoring, and alerting systems to ensure infrastructure health
• Collaborate with development teams to improve system reliability and performance
• Document infrastructure components, configurations, and operational procedures
• Stay current with industry trends and recommend infrastructure improvements

• Proven experience with network security, specifically Fortinet firewall configuration and management
• Strong knowledge of network infrastructure and protocols (AOS-CX, TCP/IP, VLANs)
• Experience with virtualization and containerization technologies (Proxmox, Docker, Docker Swarm)
• Proficiency in Infrastructure as Code tools (Ansible, Terraform)
• Experience implementing and maintaining CI/CD pipelines, particularly with GitLab CI/CD
• Strong Linux server administration skills, especially with Ubuntu
• Experience configuring reverse proxies like Nginx and Traefik
• Knowledge of NAS management, particularly TrueNAS
• Experience with log management and analysis using the Elastic Stack
• Proficiency with monitoring tools such as Zabbix, Grafana, and Prometheus
• Excellent problem-solving skills and ability to work under pressure
• Strong communication skills and ability to explain technical concepts to non-technical stakeholders
• Self-motivated with the ability to work independently and as part of a team
• We are looking for someone based in Hamburg or willing to relocate to Hamburg

Why us?

Join Us
We are an innovative startup at the forefront of 3D-printed shoe technology, and we’re looking for passionate engineers to join our dynamic team. In this key role, you’ll have the opportunity to directly influence the future of how shoes are designed and produced, making your mark on an exciting and rapidly growing industry.


Team and Work-Life
At our company, you’ll work with a diverse and multidisciplinary team of engineers, designers, and innovators who share a common goal: to revolutionize the footwear industry. We value humility, teamwork, and pushing boundaries. With a flat hierarchy, your voice will always be heard, and you’ll have the chance to collaborate across the team—including with leadership.


About Us
We are reimagining footwear with the first 3D printing technology for custom-made shoes, aiming to put printed shoes on every foot. Backed by a network of founders, influencers, and celebrities, we’re driven to disrupt the status quo and create long-lasting change. Join us as we continue to innovate and make a positive impact on the industry and beyond.


Diversity
We celebrate diversity and are committed to creating an inclusive culture. Your background, age, race, gender, or beliefs don’t matter to us—what counts is your passion and the value you bring to the team.

About us

Zellerfeld is revolutionizing the footwear industry with the world’s first 3D-printing technology for fully customizable shoes. Our goal is simple: printed shoes on every foot. We’re a passionate team of engineers, designers, and innovators, questioning the status quo and disrupting traditional manufacturing processes. Backed by founders, influencers, and celebrities who believe in our vision, we’re committed to making a lasting, positive impact—not just on the footwear industry, but on the world.