Senior Infrastructure Engineer

XTB is a global company from the financial industry, focusing on online trading of financial instruments. We are the largest FinTech in Poland and a leader in Central and Eastern Europe, and the range of our operations covers several countries, including Asia and South America. At XTB , we focus on the development of our employees, giving them opportunities to gain knowledge and skills in various fields, as well as offering a number of training and development programs. If you are looking for challenges and want to gain valuable experience in an international business environment, XTB is the right place for you. We are a certified Great Place to Work company. We are looking for an experienced Senior Systems Engineer to join our infrastructure team. You will be responsible for maintaining, automating, and scaling our core on-prem and hybrid infrastructure — spanning VMware virtualization, enterprise storage, Linux environments, and critical database clusters. Responsibilities Administering and optimizing VMware virtualization environments (vSphere / vCenter): cluster lifecycle, resource management, performance tuning, and troubleshooting. Maintaining and supporting production database environments (PostgreSQL, MongoDB) Managing enterprise storage infrastructure (SAN / block & file storage) — capacity planning, performance diagnostics, and array maintenance. Administering and hardening Linux servers (Ubuntu/Debian) across production and staging environments. Overseeing ente