Linux Administrator (Ops)

Quadcode

45d • Remote

About The Position

Quadcode is a fintech company offering financial brokerage services and a SaaS trading platform to brokers. The Linux Administrator will join the Ops team, which works across infrastructure and software development to support PHP- and Go-based applications. The team maintains the stable, secure, and reliable production infrastructure behind the company’s products, spanning virtual machines, databases, CI/CD, monitoring, automation, and internal platform services. The infrastructure includes more than 2,000 virtual machines and 300 physical servers, predominantly running Ubuntu.

The team uses Scrum and Agile practices, works in two-week sprints, and emphasizes data-driven continuous improvement. This is a full-time remote role with a flexible start time before 12:00 pm EET/EEST. The administrator will support a production environment serving millions of users, work directly with development teams on infrastructure issues, and help improve infrastructure reliability and scalability. The offer describes the engagement as a service provider contract.

Requirements

• At least 3 years of hands-on experience administering Linux servers in production environments.
• Strong practical knowledge of Linux internals, networking, system services, and troubleshooting.
• Experience administering PostgreSQL and/or Greenplum.
• Experience with containerization and orchestration technologies, including Docker and Kubernetes.
• Hands-on experience with Ansible for infrastructure automation.
• Good scripting skills with Python and/or Bash.
• Hands-on experience with CI/CD, particularly GitLab CI and/or Jenkins.
• Experience with monitoring, logging, and system profiling, particularly Prometheus and Grafana.
• Fluent Russian at C2 level or higher for team communication.
• English at B1 level or higher for technical documentation and written communication.

Nice To Haves

• DBA experience, including hands-on administration of databases and data infrastructure.
• Experience with Patroni.
• Experience supporting high-load or distributed production systems.
• Experience with AWS and OpenStack.
• Experience with PCI DSS.
• Experience reading and/or writing code in PHP or Go.
• Experience with Ceph.
• Experience in fintech or trading.

Responsibilities

• Administer Ubuntu Linux servers in development and production environments.
• Administer PostgreSQL databases and Greenplum clusters, including troubleshooting performance and reliability issues.
• Administer and support KeyDB, ClickHouse, and Kafka.
• Configure and maintain infrastructure services, including Nginx, Jenkins, GitLab CI, DataHub, Allure, and Airflow.
• Automate infrastructure and operational tasks using Ansible and scripting languages such as Python and Bash.
• Work with Docker and Kubernetes environments, including application deployments using Helm.
• Monitor production systems, troubleshoot incidents, and improve system performance and reliability.
• Build and maintain CI/CD pipelines using tools such as GitLab CI and Jenkins.
• Work with OpenStack and AWS infrastructure.
• Support development teams with infrastructure-related issues and their working environments.
• Coordinate with the Infrastructure team to troubleshoot issues and infrastructure changes, including new hardware provisioning.
• Contribute to security practices and PCI DSS requirements.

Benefits

• Competitive compensation in EUR.
• Flexible working hours.
• Corporate AI subscriptions, including Claude, Gemini, and GPT.
• Access to a rewards marketplace offering products and language courses, redeemable using the company’s internal currency.
• A strong team of engineers and a positive, friendly atmosphere.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed