Unix Systems Engineer
We are seeking a highly skilled and experienced Linux/Unix System Administrator to join our IT team. The ideal candidate will be responsible for the administration, configuration, and maintenance of our Unix-based systems. This role requires deep technical knowledge of Unix operating systems, as well as strong problem-solving and communication skills.
The role requires hands-on expertise with enterprise Unix/Linux platforms, specifically IBM AIX, Red Hat Enterprise Linux (RHEL) and Debian, including production operations, troubleshooting, patching, automation, security hardening and high-availability clustering.
Act as a Level 3 technical reference for Unix/Linux infrastructure, including AIX/RHEL/Debian internals, storage/filesystems, networking, authentication, backup/restore, performance tuning and cluster technologies such as HP Serviceguard, Bull ARF, Pacemaker and Corosync.
Responsibilities:
- Administer and support AIX, RHEL, and Debian systems (installation, configuration, patching, upgrades)
- Manage high availability environments (HP Serviceguard, Pacemaker/Corosync, Bull ARF)
- Perform advanced troubleshooting and performance analysis (CPU, memory, I/O, network, kernel, applications)
- Implement and maintain security and hardening standards (SSH, sudo, PAM, firewalls, SELinux, auditing, access control)
- Support backup and disaster recovery (mksysb, NIM, restores, DR testing)
- Automate tasks using Bash/KSH/Python and Ansible
- Participate in on-call rotation and DR/failover validation
- Collaborate with cross-functional teams (DBA, application, storage, network, security)
- Maintain technical documentation and runbooks
- 5–10+ years of experience in Unix/Linux production environments
- Strong expertise in:
- IBM AIX (LPAR, VIOS, NIM, LVM, JFS2)
- RHEL and Debian
- Solid knowledge of:
- HA clustering, storage (SAN/NAS, multipath), networking (TCP/IP, DNS, VLANs)
- Advanced system troubleshooting
- Scripting and automation experience (Ansible preferred)
- Strong understanding of system security and compliance
- Fluent in Portuguese and English
Nice to Have
- VMware
- Cloud platforms (AWS, Azure, GCP)
- Monitoring tools (Icinga, ScienceLogic)
- Containers (Docker, Kubernetes)