Network Administrator

Grupo Nexxees

. Manage and maintain physical data center infrastructure, including bare-metal servers, storage systems, switches, and racks .

Posted 9/29/2026full-timeFlorianópolis • BrazilMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in managing and maintaining physical data center infrastructure, including Linux and Windows server administration, networking, and virtualization. Proficient in implementing security measures, backup solutions, and disaster recovery procedures while ensuring optimal performance and connectivity.

Highest-signal resume keywords

Linux Server AdministrationWindows Server AdministrationNetworking Knowledge (TCP/IP, DNS, DHCP)Virtualization Tools ProficiencyFirewall Management (Fortinet, pfSense, Cisco)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Linux Server AdministrationWindows Server AdministrationNetworking (TCP/IP, DNS, DHCP, VLANs)Virtualization ToolsFirewall ManagementUser Authentication Systems (Active Directory, LDAP)Backup Solutions (Veeam, Bacula, Veritas)Automation (PowerShell, Bash, Python, Ansible)BGP and OSPF KnowledgeMonitoring Tools (Zabbix, Grafana, PRTG)

Soft Skills

Advanced English Proficiency

Tools & Technologies

KVM VirtualizationActive DirectoryRADIUSSSOVPN SolutionsIDS/IPS SystemsCloud Environments (AWS, Azure, Google Cloud)Asterisk PBX

Industry Keywords

Data Center InfrastructureDisaster Recovery ProceduresMission-Critical EnvironmentsDedicated Data Transport CircuitsAI for Task Automation

Tech Stack

Tools & technologies

AnsibleAWSAzureCloudDNSFirewallsGrafanaLinuxPythonTCP/IP

About the role

Key responsibilities & impact

Manage and maintain physical data center infrastructure, including bare-metal servers, storage systems, switches, and racks
Administer Linux and Windows Server environments, performing maintenance, updates, and performance tuning
Manage identity and access using Active Directory, RADIUS, and SSO
Operate and optimize KVM virtualization environments, performing migrations and resource management
Manage backup and disaster recovery procedures, ensuring data integrity and conducting periodic restoration tests
Configure and maintain network devices, such as switches, routers, and access points, managing VLANs, routes, and ACLs
Administer firewall rules and client-to-site and site-to-site VPNs, as well as monitor IDS/IPS systems
Maintain connectivity through site-to-site VPN tunnels, manage redundant internet links, and support troubleshooting of L2L and MPLS dedicated circuits with telecommunications carriers
Monitor network performance, analyzing traffic metrics and resolving bottlenecks
Assist with the implementation of OSPF and BGP dynamic routing protocols
Identify opportunities to improve the architecture and propose new technologies
Keep technical documentation up to date, including topologies, configuration manuals, and inventory
Provide Level 2 and Level 3 technical support, resolving complex issues and documenting root causes in postmortems

Requirements

What you’ll need

Solid experience administering Linux and Windows servers
In-depth knowledge of networking, including TCP/IP, DNS, DHCP, VLANs, and routing
Experience with firewalls such as Fortinet, pfSense, Cisco, or equivalent solutions
Proficiency with virtualization tools
Knowledge of encryption protocols and digital certificates
Proficiency with monitoring tools such as Zabbix, Grafana, PRTG, or equivalent solutions
Proficiency with user authentication systems, including Active Directory and LDAP
Advanced English proficiency for technical conversations with clients and vendors
Experience in mission-critical environments
Experience with IP telephony and Asterisk PBX
Advanced knowledge of BGP and OSPF
Knowledge of and troubleshooting experience with dedicated data transport circuits, such as L2L and MPLS
Experience with cloud environments, such as AWS, Azure, or Google Cloud
Knowledge of automation using PowerShell, Bash, Python, or Ansible
Knowledge of enterprise backup solutions, such as Veeam, Bacula, Veritas, or equivalent solutions
Knowledge of AI for task automation and optimization

Benefits

Comp & perks

Hybrid work model
Bicycle parking and locker room facilities
Games and relaxation area
Daily workplace exercise sessions
Fresh fruit at the beginning of each week
Shorts permitted at work
Free functional training classes twice a week on company premises