Linux Administrator (Infrastructure)

About the Role

Quadcode is seeking an experienced Linux Administrator to join their Infrastructure team, responsible for building, operating and continuously improving infrastructure services that support a large-scale global trading platform. The infrastructure spans 2,000+ virtual machines and 300+ physical servers running predominantly on Ubuntu.

Key Responsibilities

• Oversee core services including DNS, GitLab, Artifactory, Vault, Prometheus, Loki and Grafana

• Perform operational tasks such as upgrades, CVE patching, backup/restore, security scans and monitoring

• Design, configure, maintain and troubleshoot Linux systems across bare metal, virtual machines and containerized environments

• Resolve incidents, provide support coverage and conduct root cause analysis

• Manage and support private cloud infrastructure based on OpenStack and Kubernetes

• Automate repetitive operational tasks to reduce manual effort

• Collaborate with development teams to troubleshoot infrastructure issues in production

• Maintain infrastructure documentation and operational procedures

Requirements

• 3+ years professional experience as a Linux System Administrator, DevOps Engineer or Site Reliability Engineer

• Extensive experience designing, building and troubleshooting Linux servers across various environments

• Proficiency with automation tools such as Chef, Ansible or Salt

• Experience with Docker, Kubernetes and containerized environments

• Experience with monitoring and log aggregation tools like Grafana, ELK or Graylog

• Scripting skills in Bash and Python

• Experience with DevOps tools and CI/CD workflows

• C1 Russian and B1 English language proficiency