About the Team

We are Quadcode, a fintech company excelling in financial brokerage activities and delivering advanced financial products to our general clientele. Our flagship product, an internal trading platform, is offered as a Software-as-a-Service (SaaS) solution to other brokers.

About the role

We’re looking for a Linux Administrator to join our Infrastructure team, responsible for building, operating and continuously improving a private cloud infrastructure based on OpenStack and Kubernetes.

Our infrastructure supports the stable operation of a large-scale trading platform and includes 2,000+ virtual machines and 500+ physical servers, as well as a wide range of Linux systems and infrastructure services such as DNS, GitLab, Artifactory, Prometheus, Loki and Vault.

You’ll work in a team of experienced infrastructure engineers, using Scrum and Agile practices, with two-week sprints and a strong focus on automation, reliability and continuous improvement.

The position is full-time remote, with a flexible start time — anytime before 12:00 pm EET/EEST.

Why this role?

You’ll be part of the team responsible for the production environment behind products used by millions of users, working directly with development teams, helping them troubleshoot infrastructure-related issues and keep their services running reliably in production.

It’s a good fit for an engineer who enjoys troubleshooting, automation and making infrastructure more reliable and scalable, rather than simply maintaining servers.

Tasks

- Oversee various services and associated infrastructure components, including DNS, Gitlab, Artifactory, Vault, etc;
- Perform day-to-day operational tasks such as upgrades, CVE patching, backup and restore, security scans, and monitoring;
- Manage and support private clouds (Openstack and Kubernetes);
- Design,



configure, maintain and troubleshoot Linux systems across different environments, including bare metal, virtual machines and containers.
- Resolve incidents, provide support coverage, categorize issues, conduct post-mortems, and perform root cause analysis;
- Ensure environments are stable and adhere to availability SLAs;
- Work towards reducing operational effort;
- Automate repetitive operational tasks and continuously reduce manual effort;
- Collaborate with development teams to troubleshoot infrastructure-related issues in production;
- Keep infrastructure documentation and operational procedures up to date;
- Engage in constant upskilling to stay updated with industry best practices.

Requirements

- 5+ years of professional experience as a Linux system administrator, DevOps Engineer, or Site Reliability Engineer;
- Extensive experience in designing, building, configuring, and troubleshooting Linux servers across various environments (bare metal, container, cloud);
- Experience with Linux server configuration, maintenance and troubleshooting in production.
- Understanding of process control, logging and Linux service management.
- Experience with infrastructure services such as Vault, Artifactory, DNS and similar platform components.
- Proficiency with automation tools such as Ansible, Salt, or Chef;
- Experience with Docker, Kubernetes and containerized environments;




- Experience with monitoring and log aggregation tools like Grafana, ELK, or Graylog;
- Hands-on experience in deploying and maintaining systems on cloud solutions such as OpenStack, VMware, Proxmox, or public cloud platforms such as AWS, GCP, Azure.
- Skilled in scripting languages such as Bash and Python;
- Familiarity with configuring various servers and databases, including Apache Tomcat, Nginx, MySQL DB, PostgreSQL, Kafka, RabbitMQ, etc;
- Experience with DevOps tools and CI/CD workflows.
- At least C1 in Russian and B1 in English.

Nice to have

- Hands-on experience with Kubernetes, including troubleshooting workloads and cluster-related issues.
- Hands-on experience with OpenStack, including deployment, configuration, maintenance or troubleshooting of private cloud environments.
- Experience with GitLab CI/CD, Jenkins or GitHub Actions.
- Experience working with fintech/trading, or other high-load and mission-critical systems.

We offer

- Full-time remote work (service provider contract).
- Competitive compensation (EUR).
- Flexible working hours.
- Corporate AI subscriptions (Claude, Gemini, GPT, etc.).
- Access to a rewards marketplace offering products and language courses, redeemable using the company’s internal currency.
- A strong team of engineers.
- Positive and friendly atmosphere.

With a team of 500+ creative and tech-driven people across the globe, Quadcode is the place where ideas turn into impact, where every project is a chance to grow, innovate, and make your mark.

Join us today, and let's shape the future of fintech together!

Note: All applications will be treated with strict confidence. We thank all applicants for their interest, however, only those candidates selected for interviews will be contacted.

#LI-JM1

📌 Linux Administrator (Infrastructure) (España)
🏢 Quadcode
📍 España