Description
Senior System Administrator/Infrastructure Engineer
Team: Information Security
Location: Belgrade
Commitment: Full-Time
Workplace Type: onsite
About Unlimit
Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform.
Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed. Driving the evolution of payments, Unlimit is transforming its infrastructure from human-operated fintech into AI-native financial infrastructure — where APIs are consumed by machines, integrations are negotiated by agents, and systems evolve continuously through intelligent automation. Our next users are not only humans. They are AI agents acting on behalf of humans and businesses.
Unlimit serves more than the needs of businesses today; we are building the nervous system for a borderless global economy.
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
Join Unlimit Team now!
Unlimit is an equal opportunity employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion or belief.
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