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ESSS

Senior Infrastructure Analyst – Linux, AD, OPNsense/pfSense

ESSS

. Design, operate, and continuously improve IT infrastructure in a hybrid environment (on-premises and cloud) .

Posted 10/23/2026full-timeFlorianópolis • BrazilSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in administering Linux and Windows servers, managing identity and directory services, and operating cloud resources in GCP and AWS. Proficient in automating tasks, maintaining infrastructure security, and leading vulnerability management efforts.

Highest-signal resume keywords
Linux Server AdministrationWindows Server AdministrationCloud Resource Management (GCP/AWS)Network Security and ManagementAutomation and Configuration Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Linux AdministrationWindows Server AdministrationIdentity and Directory Services (AD/Samba AD, LDAP, SSO)Network Management (VPNs, VLANs, Routing, QoS)Cloud Administration (GCP/AWS)Scripting (Bash, PowerShell)Vulnerability ManagementMonitoring and Incident ResponseInfrastructure as Code (IaC)ITSM (GLPI, Jira Service Management)
Soft Skills
MentoringIndependent Decision-MakingTechnical Reference
Tools & Technologies
OPNsense/pfSenseZabbixPrometheus/GrafanaVMwareProxmoxHyper-V
Industry Keywords
Hybrid IT InfrastructureAutomationSecurity PracticesIncident ManagementBackup and Restore Strategies

Tech Stack

Tools & technologies
ApacheAWSDNSFirewallsGoogle Cloud PlatformGrafanaITSMLinuxMariaDBMySQLNGINXPHPPrometheusPythonSQLTCP/IPVMware

About the role

Key responsibilities & impact
  • Design, operate, and continuously improve IT infrastructure in a hybrid environment (on-premises and cloud)
  • Ensure infrastructure availability, security, and automation
  • Work independently on technical decisions and serve as a technical reference for the team
  • Own critical incidents end to end
  • Administer Linux and Windows servers in production
  • Manage identity, directory, account, and access services
  • Operate and enhance the corporate network, firewalls, VPNs, VLANs, routing, and QoS
  • Administer resources in GCP and/or AWS
  • Maintain monitoring, alerts, metrics, and incident response processes
  • Manage vulnerabilities and remediation
  • Automate tasks and standardize configurations
  • Document architecture, procedures, and runbooks
  • Handle Level 3 support tickets through ITSM
  • Participate in migrations, upgrades, and evaluations of new technologies
  • Mentor mid-level and junior analysts

Requirements

What you’ll need
  • Administer Linux and Windows servers in production (physical, virtualized, and cloud-based), including hardening, patching, and capacity planning
  • Manage identity and directory services (AD/Samba AD, LDAP, SSO) and the account and access lifecycle
  • Operate and enhance the corporate network, including highly available OPNsense/pfSense firewalls, VPNs, VLANs, routing, and QoS
  • Administer cloud resources (GCP and/or AWS), with a focus on IAM, costs, networking, and backups
  • Maintain monitoring and alerts, defining metrics, thresholds, and incident response procedures
  • Lead vulnerability management and remediation in alignment with the company’s security practices
  • Automate recurring tasks and standardize configurations (scripts, IaC, pipelines)
  • Document architecture, procedures, and runbooks, and handle Level 3 support tickets through ITSM
  • Participate in migration and upgrade projects and evaluate new technologies
  • Mentor mid-level and junior analysts
  • Hands-on experience and practical knowledge of Linux (RHEL-based distributions, AlmaLinux/Rocky, Debian/Ubuntu, systemd, LVM, SELinux/AppArmor, and troubleshooting)
  • Experience with Windows Server, Active Directory, GPO, DNS, DHCP, PKI/ADCS, and Linux–AD integration (SSSD/Kerberos)
  • Knowledge of TCP/IP, VLANs, routing, NAT, and VPNs (IPsec, WireGuard/OpenVPN)
  • Experience installing, upgrading, and administering OPNsense/pfSense in production, including high availability, failover, traffic shaping, plugins, backup/restore, and troubleshooting
  • Knowledge of VMware, Proxmox, or Hyper-V
  • Hands-on experience with GCP or AWS, including IAM, VPC, compute, storage, and security
  • Knowledge of Zabbix, Prometheus/Grafana, or equivalent tools
  • Fluency in Bash and PowerShell; Python is a strong plus
  • Knowledge of hardening (CIS), TLS certificates, vulnerability scanners, least privilege, and MFA
  • Knowledge of the 3-2-1 backup strategy, restore testing, and defining RPO/RTO
  • Knowledge of Nginx/Apache, PHP-FPM, MySQL/MariaDB, and SQL Server for basic administration and troubleshooting
  • Knowledge of ITSM and tools such as GLPI, Jira Service Management, or similar platforms

Benefits

Comp & perks
  • Flexible benefits card (Food, Mobility, Culture, Health, and Home Office) provided through a SWILE card
  • Health insurance with full coverage for the employee and no copayment (Bradesco Nacional)
  • Support for continuing education through courses, training, specializations, and language assistance
  • Hybrid work arrangement combining remote and in-office activities (2 remote days)
  • Extended maternity and paternity leave, among other benefits