System Administrator

Relax Tech Sweden AB; Skåne län; On-site; SEK 400,000 - 600,000; Full time

Job summary

Relax Tech Sweden AB is seeking a skilled System Administrator to join our infrastructure team in Skåne län. This practical role focuses on maintaining a reliable, scalable, and secure platform. Responsibilities include administering Linux-based systems, automating infrastructure, and optimizing databases.

The ideal candidate will have at least 3 years of Linux administration experience, strong skills in Ansible, and familiarity with cloud platforms. Candidates must be fluent in English.

Qualifications

• Minimum 3 years of experience in Linux system administration.
• Strong experience with automation and configuration management.
• Ability to troubleshoot complex infrastructure issues independently.

Responsibilities

• Administer and maintain Linux-based infrastructure (Debian).
• Automate infrastructure provisioning and configuration using Ansible.
• Manage and optimize databases (MariaDB, MongoDB, PostgreSQL).

Skills

Linux system administration

Ansible

Infrastructure as Code

Proxmox

AWS

MariaDB

PostgreSQL

Networking fundamentals

Docker

English fluency

Tools

Zabbix

Prometheus

Grafana

InfluxDB

Elastic Stack

Kubernetes

Jenkins

Bitbucket Pipelines

Bash

Python

Go

ZFS

Job description

We are looking for a System Administrator to join our infrastructure team and help build, maintain, and improve a reliable, scalable, and secure platform.

This is a practical, engineering-focused role with direct involvement in day-to-day infrastructure operations. You will work closely with production systems, improve automation, and ensure stability and security across the environment.

We place strong emphasis on building consistent, standardized, and maintainable infrastructure, avoiding ad-hoc solutions and ensuring systems are reliable and scalable.

This role is available in these locations: Tallinn, Malmö, Malta or Helsinki.

Key responsibilities

• Administer and maintain Linux-based infrastructure (Debian)
• Automate infrastructure provisioning and configuration using Ansible
• Manage and optimize databases (MariaDB, MongoDB, PostgreSQL)
• Perform regular security patching and vulnerability remediation
• Participate in server sizing, capacity planning, and performance tuning and security monitoring
• Troubleshoot system, network, and application issues
• Work with containerized workloads using Docker
• Collaborate with other teams to improve infrastructure reliability, security and deployment processes

Skills required

• Strong experience with Linux system administration (preferably Debian-based systems)
• Practical experience with configuration management (Ansible)
• Experience or familiarity with Infrastructure as Code (e.g. Terraform)
• Experience with virtualization platforms, preferably Proxmox
• Familiarity with cloud platforms (e.g. OpenStack, Amazon Web Services)
• Experience managing relational databases (MariaDB, PostgreSQL, MongoDB)
• Good understanding of networking fundamentals (TCP/IP, routing, firewalls, DNS)
• Hands-on experience with container technologies (Docker)
• Ability to troubleshoot complex infrastructure issues independently
• Fluency in spoken and written English is critical for success in this role

Years of experience: Minimum 3 years of experience

Nice to have

• Experience with monitoring and observability tools such as
• Zabbix, Prometheus, Grafana, InfluxDB, Elastic Stack
• Experience with container orchestration using Kubernetes
• Familiarity with CI/CD practices and tools (e.g. Jenkins, Bitbucket Pipelines)
• Scripting or programming skills (Bash, Python, or Go)
• Experience with ZFS (e.g. storage management, snapshots, replication)

We will be extra excited if you have any of the following

• Certified Kubernetes Security Specialist (CKS)
• Certified Kubernetes Administrator (CKA)
• AWS Certified Solutions Architect – associate