Senior Unix System Engineer – Aix/Linux, Automation

Inetum; Almada; Presencial; EUR 52 000 - 72 000; Tempo integral

Resumo da oferta

Inetum in Portugal seeks an experienced Unix Systems Engineer to manage and troubleshoot critical Unix/Linux environments (AIX, RHEL, Debian) across on‑prem and cloud-adjacent infrastructures. You will support high‑availability systems, cluster services, and enterprise workloads, with emphasis on automation and security.

The role requires 5–10 years in enterprise Unix administration, strong scripting skills, and fluent English; French or Dutch is a plus.

Qualificações

• 5–10 years of Unix/Linux administration in enterprise environments.
• Deep expertise in IBM AIX, Red Hat Enterprise Linux, and Debian.
• Strong knowledge of boot processes, filesystems, LVM, networking, and performance.
• Hands-on with high-availability clustering and automation tooling.
• Security hardening, SSH/PAM, auditing, and compliance relevant to enterprises.
• Experience with LDAP/AD/Kerberos/SSSD integrations.
• Fluent English; French or Dutch a plus.

Responsabilidades

• Administer and troubleshoot complex Unix/Linux environments across multiple platforms.
• Operate high-availability clusters and perform performance diagnostics.
• Implement security hardening and policy controls; manage backups and DR tests.
• Automate tasks with Bash, ksh, Python, and Ansible; maintain runbooks.
• Collaborate with DBAs, middleware, storage, network, and security teams.

Conhecimentos

Unix/Linux administration

AIX

RHEL

Debian

High-availability clustering

Scripting & automation

Security hardening

LDAP/AD/Kerberos/SSSD

Backup & DR

Cloud knowledge

Monitoring tools

English proficient

French/Dutch a plus

Ferramentas

VMware

Serviceguard

Pacemaker/Corosync

Ansible

SCADA/observability tools

Descrição da oferta de emprego

Descrição do cargo

Job Description

As a Unix Systems Engineer, you will be responsible for the administration, maintenance, and advanced troubleshooting of critical Unix/Linux environments, ensuring the stability, security, and continuous availability of AIX, RHEL, and Debian platforms across on-premises and cloud-adjacent infrastructures. You will act as an L3 technical reference, supporting high-availability systems, clustered services, and enterprise workloads.

Responsibilities:

• Administer and troubleshoot complex Unix/Linux environments (AIX, RHEL, Debian);
• Install, configure, patch, and upgrade Unix/Linux systems and related components;
• Operate and support high-availability clusters (HP Serviceguard, Bull ARF, Pacemaker/Corosync);
• Perform advanced performance and system diagnostics across CPU, memory, storage, networking, kernel, and applications;
• Implement security hardening, permissions, SSH/PAM policies, firewall rules, audit logging, and vulnerability remediation;
• Integrate Unix/Linux systems with enterprise authentication (LDAP/AD, Kerberos, SSSD);
• Execute and validate backup, restore, DR, and failover procedures;
• Automate operational tasks using Bash, ksh, Python, and Ansible;
• Monitor system health, capacity, and performance, ensuring proactive issue detection;
• Collaborate with DBA, middleware, application, storage, backup, network, and security teams;
• Create and maintain technical documentation, runbooks, and operational procedures;
• Provide L3 support and resolve complex incidents across Unix/Linux platforms;
• Participate in on-call rotations, ensuring rapid response and SLA compliance;
• Plan and execute system migrations, lifecycle upgrades, and infrastructure improvements.

Profile:

• 5–10 years of experience in Unix/Linux administration in enterprise environments;
• Strong expertise in IBM AIX, Red Hat Enterprise Linux (RHEL), and Debian;
• Deep knowledge of Unix/Linux internals: boot process, services, package management, filesystems, LVM, multipath, networking, logging, and performance troubleshooting;
• Hands‑on experience with high‑availability clustering (Serviceguard, Bull ARF, Pacemaker/Corosync);
• Strong scripting and automation skills (Bash, ksh, Python, Ansible);
• Solid understanding of security, hardening, permissions, PAM/SSH, audit frameworks, and compliance;
• Familiarity with network protocols and services (TCP/IP, DNS, DHCP, NTP);
• Experience with VMware or equivalent virtualization platforms;
• Cloud knowledge (AWS, Azure, GCP) is a plus;
• Experience with monitoring and observability tools (Icinga, ScienceLogic, syslog, SNMP);
• Relevant certifications (RHCE, LPIC, AIX) are preferred;
• Fluent English;
• French or Dutch are a plus.

About Inetum

Inetum is a European leader in digital services. Inetum’s team of 28,000 consultants and specialists strive every day to make a digital impact for businesses, public sector entities and society. Inetum’s solutions aim at contributing to its clients’ performance and innovation as well as the common good.

Present in 19 countries with a dense network of sites, Inetum partners with major software publishers to meet the challenges of digital transformation with proximity and flexibility.

Driven by its ambition for growth and scale, Inetum generated sales of 2.5 billion euros in 2023.

Additional Information