Senior System Administrator
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Job Description
Senior System Administrator managing Microsoft, VDI, virtualization, and cloud infrastructure for global social discovery platforms. Supporting migrations, operations, security, patching, and high availability across distributed teams.
Responsibilities:
- Administer the corporate Microsoft infrastructure, including Active Directory, DNS, DHCP, Certificate Authority (PKI), and Group Policy
- Administer Atlassian Jira and Confluence, the 1C/ERP application and SQL servers, monitoring, backup, Google Workspace, and Slack
- Support VDI and terminal server farms; administer domain services and certificates; patch and document systems
- Resolve incidents and service requests within agreed SLAs
- Participate in infrastructure projects including Active Directory domain migration, Citrix VDI replacement, application publishing and load-balancing stack replacement, Windows server upgrades, and legacy system decommissioning
- Prepare implementation steps, build test environments, and run project pilots
- Maintain infrastructure documentation and inventory in NetBox and Confluence
- Participate in the on-call rotation to maintain system availability
- Collaborate with NOC, InfoSec, DevOps, and L2 Support teams
Requirements:
- Bachelor's degree in Computer Science, IT, or a related field
- Minimum 5 years administering Microsoft and VDI infrastructure
- Completed at least one Active Directory domain or forest migration, including object migration between domains and forests with minimal downtime
- Production experience administering VDI or terminal access platforms
- Expertise in multi-domain Active Directory Domain Services, including domains, forests, trusts, replication, FSMO, DFS, GPO, delegation, Kerberos/NTLM, auditing, and new domain controller deployment
- Experience with ADMT/PES, SID History, dependency inventory, and phased domain/forest migration
- DNS administration: zones, forwarders, zone transfers, and split horizon
- PKI/AD CS: templates, auto-enrolment, revocation, renewal, and TLS lifecycle
- Citrix or alternative VDI administration, including deployment, golden images, troubleshooting, and Windows 11
- Windows RDS farm operation, including Connection Broker, RD Gateway, Session Hosts, published apps, CAL, FSLogix, and Duo MFA
- Windows Server upgrades, WSUS, patching, file services, Veeam backup/restore, and addressing audit findings
- Linux administration with Ubuntu, AlmaLinux, CentOS/RHEL, including systemd services, packages, users/access, logs, and troubleshooting
- Load balancing with nginx and HAProxy, including reverse proxy, publishing, TLS termination, health checks, NLB, and keepalived/VRRP
- Hyper-V and VMware ESXi virtualization administration, including VMs, hosts, datastores, and snapshots
- Google Workspace/GCP administration, including tenants, domains, groups, SSO/OAuth, domain-wide delegation, administration, billing, GWS backup, and GCP projects
- PowerShell for routine administration
- Fluent Russian and English proficiency, with English at B1 (Intermediate) or above
- Clear communication, collaboration, problem-solving, adaptability, critical thinking, attention to detail, and customer focus
- Nice to have: Bash or Python, Terraform, Ansible, VMware Horizon, Azure Virtual Desktop, Amazon WorkSpaces, AWS/Azure/GCP, storage administration, HCI, and ITIL or another service management certification
Benefits:
- Vacation 28 calendar days per year
- 7 wellness days per year
- Bonuses up to $5000 for recommending successful applicants
- 50% payment for professional training, international conferences, and meetings
- Corporate discount for English lessons
- Health benefits, including compensation of up to $1,000 gross per year per employee for health insurance or doctor’s fees when not eligible for corporate medical insurance
- Equipped workplace and necessary equipment in company offices or co-working locations
- Reimbursement of workplace costs up to $1,000 gross once every 3 years for eligible other locations
- Internal gamified gratitude system with bonuses exchangeable for merchandise, team building activities, massage certificates, etc.
- Remote opportunity to work full-time
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