Unlimitail

Senior System Administrator/Infrastructure Engineer

Unlimitail • RS
About Unlimit
 
Unlimit is the global fintech powerhouse behind the world’s largest proprietary payments infrastructure.
Founded in 2009, Unlimit operates across 17 global offices with 700+ experts, seamlessly integrating 1,000+ payment methods into a single platform. From London to São Paulo, we empower businesses to scale across borders with a unified suite of financial tools — including payment processing, alternative payment methods, multicurrency business accounts, card issuing, banking-as-a-service, and crypto on- and off-ramps.
Our mission is to break down financial barriers and enable seamless money movement across borders. We give forward-thinking businesses the tools to accept, send, and manage payments effortlessly, wherever they operate.


About the Role
We are looking for a hands-on System Administrator to manage and support our on-premise IT infrastructure. This role is responsible for maintaining high availability, security, and operational stability of local systems. The ideal candidate is structured, proactive, security-aware, and comfortable working in a regulated environment (fintech).

Responsibilities

  • Administration of Windows and Linux servers (AD, DNS, DHCP, File Services)
  • Management of virtualization platforms (VMware / Hyper-V)
  • Support and maintenance of the on-premise equipment
  • Backup administration and restore testing
  • Monitoring system health and availability
  • Patch management and vulnerability remediation
  • Managing local integrations with cloud services and migration to AWS
  • Maintaining technical documentation and runbooks
  • Participating in BCP/DR testing (including DR site switchovers)
  • Vendor coordination for on-site hardware and connectivity
  • Supporting office expansions or relocations
  • Required Qualifications

  • 3–5+ years experience as System Administrator / IT Infrastructure Engineer
  • Strong knowledge of:
  • Windows Server (AD, GPO, DNS, DHCP)
  • TCP/IP networking fundamentals
  • VLANs, routing, firewall basics
  • Virtualization (VMware or Hyper-V)
  • Experience with backup solutions
  • Understanding of IT security best practices
  • Experience in regulated environment is a plus
  • Good written and spoken English
  • Nice to Have

  • AWS experience
  • Linux administration
  • Experience with monitoring systems (Zabbix / Prometheus / etc.)
  • ITIL understanding
  • Scripting skills (PowerShell / Bash)
  • Experience in fintech or banking sector