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System Administrator Miejsce pracy: Warszawa Technologies we use Expected Bash Python Operating system Linux Your responsibilities ✔ Manage and expand large-scale Linux server infrastructure running in multiple global data centers ✔ Monitor production systems and respond to infrastructure alerts and incidents ✔ Automate routine administrative tasks using scripts and infrastructure tools ✔ Support development teams by maintaining stable and scalable infrastructure environments ✔ Ensure system security, reliability, scalability and high availability Depending on the team you join, you may also work on: BOM Team – Backup, Orchestration, Monitoring ✔ Maintaining configuration management systems based on Puppet ✔ Developing and maintaining monitoring systems and dashboards ✔ Managing on-premise container platforms and infrastructure services ✔ Maintaining backup systems and internal infrastructure tools ✔ Supporting Machine Learning teams with GPU and storage infrastructure HW Infrastructure Team ✔Deploying and integrating new servers into production infrastructure ✔ Maintaining physical server infrastructure across multiple datacenters ✔ Managing virtualization and storage clusters ✔ Troubleshooting hardware and low-level infrastructure issues ✔ Participating in hardware capacity planning and performance testing of new components ✔ Collaborating with datacenter technicians during infrastructure upgrades and maintenance Our requirements 3 years of experience in Linux system administration Experience working with production infrastructure environments Ability to write automation scripts (Bash, Python or similar) Understanding of Linux networking concepts (iptables, bridging, bonding, VPNs, network namespaces) Experience troubleshooting systems via Linux console Familiarity with container technologies and infrastructure tooling Ability to quickly learn new technologies and adapt to evolving environments Fluency in English (written and spoken) What we offer Work with large-scale infrastructure processing millions of requests per second Collaboration with experienced system administrators and engineers Opportunity to work with modern open-source infrastructure technologies Real impact on the development of a global AdTech platform Flexibility when it comes to work model and time Training, development and conferences attendance budget Friendly work environment and supportive team culture Office location near Wilanowska metro station in Warsaw Our infrastructure processes over 23 million requests per second and runs across four global data centers (EU, APAC, US East and US West), powered largely by open-source technologies and modern infrastructure automation. Our System Administration team is responsible for designing, maintaining and scaling the infrastructure that powers RTB House’s global platform. We manage thousands of servers, develop internal infrastructure tooling and ensure the reliability, scalability and security of our production environment. We are currently expanding two infrastructure teams: ✔ BOM (Backup, Orchestration, Monitoring) – focused on infrastructure automation, configuration management, monitoring systems and internal tooling. ✔ HW Infrastructure – focused on physical server infrastructure, hardware lifecycle, and deployment of new servers across our datacenters. If you enjoy working close to large-scale infrastructure and solving complex system problems, RTB House might be the right place for you. Selected Technologies: Linux Docker Git Kubernetes Puppet / Ansible Icinga Grafana Ceph DNS BGP Aerospike, PostgreSQL, MySQL, ArangoDB, InfluxDB RTB House RTB House is a next-generation performance demand-side platform (DSP) that uses proprietary Deep Learning AI algorithms to help brands grow. The company is the market leader in driving performance using Deep Learning across the entire purchase funnel. Founded in 2012, and now operating in 90 markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients.