Senior Infrastructure Engineer (Network, Datacenter)

erasys GmbH; Berlin; Hybrid; EUR 80.000 - 120.000; Vollzeit

Benefits dieser Stelle

Hybrid work model

German language classes in Berlin

Wellpass gym access

MacBook provided

Flexible hours

Zusammenfassung

erasys GmbH is seeking an experienced Senior Infrastructure/Systems Engineer to operate, maintain, and improve our on-premise infrastructure in a hybrid Berlin setup. You will work hands-on with Linux servers, Kubernetes, Redis, and databases to ensure secure, scalable, and highly available platforms.

The role emphasizes availability, scalability, and security of systems and networks, with a focus on production-grade infrastructure and incident response in a collaborative environment.

Qualifikationen

• 5+ years hands-on experience in network, system, or infrastructure engineering.
• Strong Linux server administration (Debian/Ubuntu preferred).
• Solid expertise with Kubernetes, Docker, and Helm.
• Experience with datacenter operations and hardware maintenance.
• Experience with Terraform, Ansible, GitLab CI/CD, and Puppet.
• Strong networking skills (TCP/IP, routing, switches, firewalls, VPNs).

Aufgaben

• Administer and maintain on-premises network infrastructure and security.
• Manage Kubernetes clusters, deployments, and upgrades.
• Harden Linux servers and manage lifecycle, patching, and decommissioning.
• Implement infrastructure-as-code using Terraform, Ansible, and Puppet.
• Monitor, log, and troubleshoot systems with Prometheus, Grafana, and Zabbix.
• Support incident response and on-call rotations.
• Collaborate with development and product teams to optimize deployments.

Kenntnisse

Networking

Linux

Kubernetes

Docker

Terraform

Ansible

Monitoring

Security

Datacenter

Tools

GitLab CI/CD

Puppet

AWX

Rancher

Terraform

Ansible

Jobbeschreibung

We are seeking an experienced Senior Infrastructure/Systems Engineer to help operate, maintain, and improve our on-premise infrastructure. You will work hands-on with networking equipment, Linux servers, Kubernetes, Redis.Ensuring that our platforms are secure, scalable, and highly available.

In this role, you will be responsible for the availability, scalability, and security of our systems and networks, ensuring smooth day-to-day operations, reliable deployments, and secure access for our teams.

This is a hands-on technical role, ideal for a technically driven engineer who thrives in complex, production-grade infrastructure environments and enjoys keeping systems stable, secure, and performant.

This position offers a hybrid work mode, combining on-site collaboration with flexible remote work.

Key Responsibilities

• Administer and maintain network infrastructure, including switches, routers, VPNs, and firewalls, ensuring reliable and secure connectivity across the datacenter.
• Manage routing, switching, and secure remote access for internal teams and services.
• Perform datacenter maintenance, including hardware installation, cabling, capacity planning, and coordination with datacenter and connectivity providers.
• Operate, maintain, and harden Linux-based servers in our on-premise datacenter.
• Manage server lifecycle activities, including provisioning, patching, upgrades, and decommissioning.
• Manage and enhance Kubernetes clusters, including configuration, upgrades, scaling, and deployment automation using Helm and Docker.
• Manage, monitor, and troubleshoot RabbitMQ clusters, ensuring message delivery reliability, scalability, and fault tolerance.
• Administer and optimize Redis, Elasticsearch, and MariaDB/MySQL for performance, stability, and data integrity.
• Support and execute database migration and infrastructure modernization projects.
• Implement and maintain infrastructure-as-code practices using Terraform, Ansible, GitLab CI/CD, and Puppet.
• Maintain and improve monitoring, logging, and alerting systems (e.g., Prometheus, Grafana, Zabbix).
• Contribute to incident response, root cause analysis, and on-call rotations, and help establish incident response strategies and procedures.
• Collaborate with development and product teams to support deployment pipelines and performance optimization.
• Ensure compliance with internal security and operational policies (e.g., GDPR, data protection).
• Evaluate and maintain third-party tools, hardware, and services.
• 5+ years of hands-on experience in network, system, or infrastructure engineering, focused on on-premise environments.
• Strong networking skills (TCP/IP, routing, switching, firewalls, VPNs, and secure access).
• Strong expertise in Linux server administration (Debian/Ubuntu preferred.
• Hands-on experience with datacenter operations and hardware maintenance.
• Solid practical knowledge of Kubernetes, Docker, and Helm, including cluster management, deployments, upgrades, and troubleshooting.
• Deep understanding of RabbitMQ, including clustering, high availability, performance tuning, and troubleshooting.
• Experience with infrastructure automation and configuration management using Terraform, Ansible, GitLab CI/CD, and Puppet.
• Experience with monitoring and observability tools (Prometheus, Grafana, Zabbix).
• Excellent problem-solving and analytical skills, with attention to performance, reliability, and maintainability.

Bonus Points / Nice to have

• Experience managing RabbitMQ, Redis, Elasticsearch, and MySQL/MariaDB at scale in production.
• Experience with high-availability and distributed on-prem systems.
• Familiarity with Rancher for Kubernetes cluster management, and Foreman for provisioning.
• Knowledge of service meshes (e.g., Istio).
• Familiarity with container security and system hardening best practices.
• Knowledge of disaster recovery and business continuity planning for on-prem environments.

Operating Systems

• Ubuntu
• MariaDB
• Elasticsearch
• Redis

Web & Proxy Services

Orchestration & Automation

• Terraform
• Ansible, AWX
• Rancher
• Puppet

Monitoring & Observability

• Grafana
• New Relic

What We Offer

• Everything you need to do a great job (MacBook, etc.).
• Free weekly German classes to help you settle into Berlin life.
• Wellpass gym access and many other perks.
• Flexible hours with hybrid working between our great offices and home.
• A friendly, diverse group of colleagues from all different nationalities, genders, and orientations!