Senior Infrastructure Engineer w Warszawa, Polska

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 enterprise backup and recovery solutions (Commvault) — designing retention policies, automation, and leading regular disaster recovery tests.
• Automating operational workflows and standardizing infrastructure using Ansible, Bash, Python, and Git (IaC mindset).
• Supporting BCP/DR initiatives
• Participating in a structured on-call rotation to guarantee high availability of mission-critical systems.
• Collaborating with cross-functional platform, security, and development teams.

Requirements

• 5+ years of hands-on experience in infrastructure engineering (on-premise / data center / hybrid environments).
• Deep technical knowledge of VMware vSphere and vCenter administration and troubleshooting.
• Operational experience with database clusters (PostgreSQL, MongoDB) — maintenance, replication, backup/restore, and health monitoring.
• Strong practical administration skills in Linux (Debian/Ubuntu) — performance diagnostics, security hardening, and log analysis.
• Proven experience with enterprise storage concepts (SAN, zoning, multipathing, performance tuning).
• Practical experience with enterprise backup platforms (Commvault preferred or equivalent).
• Hands-on scripting and automation skills: Ansible, Bash or Python, and version control (Git).
• Solid understanding of high-availability architectures and BCP/DR frameworks.
• Readiness to participate in paid on-call rotations and occasional travel to data centers.
• Good technical English (spoken and written, min. B2 level).

Nice to Have

• Experience in high-availability, low-latency environments (e.g., fintech, trading, telecommunications).
• Familiarity with Terraform, Ansible AWX, and GitLab CI/CD pipelines.
• Experience with hyper-converged infrastructure (HCI, e.g., Dell VxRail).
• Awareness of regulatory and security standards (e.g., NIS2, ISO 27001, GDPR).
• Industry certifications: VMware (VCP), Red Hat (RHCSA/RHCE), or storage/backup platforms.

What We Offer

• Real influence on the development of the company and the product.
• Work in an experienced team that is happy to share its knowledge.
• A clear vision of development thanks to regular feedback and clear career paths.
• Regular team-building meetings.

Benefits

• A training budget for courses and conferences that interest you.
• An extra day off on your birthday.
• An extra day off for parents.
• Equipment tailored to your needs.
• Private medical care and group insurance.
• Access to an e-learning platform for learning English and a benefits platform.
• Access to a wellbeing platform and the opportunity to take advantage of workshops and private therapy sessions.
• Remote work, from the office in Warsaw or from a coworking space in your city.