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Senior Windows System Administrator

Sofia, Bulgaria

Senior Windows System Administrator

Location: Sofia, Bulgaria

About the job

Your new workplace 

We are a global technology company, with offices in Bulgaria and the USA, which focuses on creating and implementing innovative IoT solutions for the security industry. We pride ourselves on best-in-class engineering capabilities that allow us to bring the highest value of products at the most affordable price to our clients. Our footprint is spread to 30+ countries on 5 continents, serving over 5000 businesses and impacting the daily lives of more than 1 million end users. 

Your new role

As a Senior Windows System Administrator, you will be responsible for providing support to critical internal infrastructure and applications.

This position provides a great opportunity to maintain a private cloud infrastructure that includes 50+ servers in 4 different sites in two countries.

The Senior Windows System Administrator will be responsible for Windows servers, office network, cyber security, O365 and will interact with various stakeholders. 



  • Manage Windows Servers and services in a domain environment.
  • Execute performance tuning, patching, and other Windows system administration tasks to support a fault-tolerant, high availability and redundant IT infrastructure.
  • Analyze, isolate and resolve issues.
  • Install, configure and maintain physical and virtual servers, firewalls, etc.
  • Secure the company’s digital data: storage, backup, restore and data protection.
  • Administer access control and video surveillance systems.
  • Support office IT infrastructure, including firewalls, core and edge switches, VLANs and Wi-Fi.
  • Manage Hyper-V virtualization platform.
  • Administer Azure Applications and Services (Office 365, Dynamics 365, SharePoint Online, Power Automate, etc.)
  • Evaluate technologies and standards to meet security requirements.
  • Contribute to the development and documentation of internal IT procedures.
  • Supervise security analytics and event correlation tools, rules development, etc.



  • Bachelor or Master`s Degree in Computer Science, Electronics, Informatics or equivalent.
  • 3+ years’ experience as a System Administrator.
  • Extensive experience with Microsoft Windows Server.
  • Practical experience in configuring and maintaining Hyper-V, MS Exchange, MS Office 365;
  • Basic knowledge and experience with networking (Routing, Switching, VLAN, DHCP, TCP/IP, VPN).
  • Fluency in English – verbal and written.


  • Experience in administering CI/CD platforms, MS Azure, Microsoft SQL server, NoSQL databases, FortiWeb - Web Application Firewall.
  • Familiarity with Cisco and MikroTik Network equipment.
  • Experience with any of Jira, Azure DevOps and SharePoint.
  • Knowledge of SQL clusters and DR environments.


What we offer?

  • Join a stable, constantly growing global company;
  • Work locally – impact globally. Challenge yourself to grow professionally while having a key role in the execution of international projects;
  • Friendly and dynamic working environment;
  • Year-end bonus (13th salary);
  • Additional premium health insurance package;
  • Membership card for a number of sports venues;
  • Dedicated free parking slot right in front of the office or subsidized public transport pass

For more questions, you can write to neli(@) 
We take data protection seriously, you can read about our policy:

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