Operations Engineer (Linux)

About the role Joining Lumen Dynamics as an Operations Engineer, you will participate in a 24/7 operations team that operates, monitors, maintains, and troubleshoots our global cloud service operations . We have extensive installations throughout the world. Our focus is on ensuring reliable and predictable operations. You will: Implement and monitor logging, alerting, and monitoring to ensure system health, performance, and reliability Work on the development and extension of automation tooling to improve operational efficiency Provide support for both hardware and software systems Maintain and update documentation for daily operations and procedures Deploy, operate, and maintain Linux systems in a data center environment Participate in incident response, troubleshooting, and post-incident root cause analysis Collaborate with development and infrastructure teams to improve system stability, reliability, and performance Collaborate closely with the security team to design and implement new security solutions. Support system upgrades, patching, and security updates across the infrastructure Contribute to capacity planning and performance optimization of infrastructure systems Working Hours This role requires adherence to a shift work schedule . The workweek consists of four working days of 10 hours each, followed by three days off (40 hours a week). As our team operates 24/7, you may expect to work on holidays, however, you can always trade shifts with colleagues. About you Must-haves: Strong knowledge of Linux systems Good understanding of networking concepts, including: TCP/IP / NAT / VLANs / Firewalls (nftables) Excellent troubleshooting skills and strong command-line proficiency Experience with automation tools and IaC, preferably Ansible and AWX Familiarity with the Grafana LGTM stack (Grafana, Mimir, Loki, Prometheus) is highly desirable Strong analytical thinking and ability to solve problems independently Self-discipline, creativity, and motivation for continuous learning Good verbal and written English skills (minimum B2 level) Nice-to-haves: Experience with Debian/Ubuntu environments Experience working in an Agile environment Hands-on experience with CI/CD pipelines using GitLab CI/CD Knowledge of PostgreSQL (administration, basic performance tuning, backups) Experience with Pacemaker / Corosync high-availability clustering Experience with containers and Kubernetes Familiarity with ISO 27001 and ISAE 3402 standards CCNA certification or equivalent networking knowledge About us We are growing fast as a company and do our best to bring our SaaS cloud-based backup services to the global audience. Our platform is designed to provide customers with an immutable historical archive of their primary data in systems such as Microsoft 365, Google Workspace, Salesforce, Entra ID, Dynamics 365, and Zendesk. It aims to protect them against everything, starting from ransomware to simple accidents. Most of our back-end components are written in clean, modern C++ using mainly purpose-built components. Several components that deal with business processes and data mining are built using Common Lisp. Everything runs on Linux. Backing up billions of objects over foreign APIs using imperfect networks on systems with finite memory and making it all happen in as little time as possible, is no small feat. If you think solving hard problems is fun, we have strong indications that we will not run out of hard problems any time soon. We offer Official employment – Umowa o pracę contract 4 additional working days of vacation leave per full calendar year 3 days of internal sick leave without a doctors note Health and Life Insurance Employee Capital Plan (PPK) Multisport card compensation Coverage of professional training sessions, meetups, etc. English-speaking club with native speakers Polish language classes Internet and Glasses reimbursement Cosy office in Krakow city centre (Długa, 72) with beverages, fruit, and cookies Winter and summer parties, events, team-buildings We kindly ask you not to provide us with any sensitive categories of personal data when applying for a job with us. We kindly ask you not to provide us with any sensitive categories of personal data when applying for a job with us. When applying for the vacancy, Lumen Dynamics will process your personal data, and therefore we recommend that you also read our privacy policy , which describes our processing of personal data and your rights as a data subject. If you notice any misconduct or irregularities that fall within the scope of our whistleblowing procedure, please click here to report them.