Informix DBA Engineer

Lisbon, Portugal

---

About the Position

Inetum is a European leader in digital services. Our team of 28,000 consultants and specialists strive every day to make a digital impact for businesses, public sector entities, and society. We are looking for an IBM Informix Database Engineer to join a production-focused service center supporting mission-critical database environments. This role is ideal for a highly skilled L3 specialist with deep expertise in Informix architecture, high availability, performance tuning, and automation.

---

Responsibilities

• Design and evolve Informix database architectures, including HA/DR, replication, storage layouts, and hybrid deployment models.
• Perform advanced L3 administration, troubleshoot complex incidents, and lead deep-dive analysis using Informix tooling.
• Monitor and optimize performance through SQL tuning, indexing strategies, statistics management, and capacity tracking.
• Define and maintain backup, restore, and disaster recovery strategies, including regular DR and failover testing.
• Lead major changes such as upgrades, migrations, storage redesigns, and HA/DR improvements, ensuring safe deployments.
• Participate in 24/7 on-call rotation, handling critical incidents, and coordinating with cross-functional technical teams.
• Develop automation scripts and contribute to CI/CD pipelines to industrialize provisioning, patching, and monitoring.
• Implement and enforce security policies, including authentication, privileges, encryption, auditing, and compliance.
• Produce and maintain technical documentation (architectures, runbooks, procedures) and enrich internal knowledge bases.
• Mentor junior DBAs and act as a subject-matter expert in technical committees and customer meetings.

---

Requirements

• Experience: 5–10+ years of experience in production database administration, with strong hands-on expertise in IBM Informix.
• Skills:
  • Solid background in Informix architecture, high availability, migrations, performance tuning, and large-scale database operations.
  • Advanced knowledge of Informix engine components (dbspaces, chunks, logs, onstat/onmode/oncheck tooling, sysmaster/sysadmin).
  • Strong expertise in Informix HA/DR technologies (HDR, RSS, SDS, Enterprise Replication, Connection Manager).
  • Proven skills in performance tuning: query plan analysis, SQL optimization, indexing, fragmentation, and statistics management.
  • Solid understanding of backup/restore mechanisms (ON-Bar, ontape, logical logs, dbexport/dbimport) and complex recovery scenarios.
  • Good knowledge of Linux/AIX environments, OS-level troubleshooting, virtualization (VMware), and storage architectures (SAN/NAS).
  • Experience with scripting and automation (PowerShell, Python, Bash, Ansible) and contribution to CI/CD pipelines.
  • Strong analytical mindset, ability to stay calm under pressure, and perform effectively in on-call situations.
  • Excellent communication skills and ability to collaborate with cross-functional technical teams.
  • Organized, autonomous, customer-oriented, and comfortable working in demanding, SLA-driven environments.
• Languages: Fluent English required; French or Dutch are considered a plus.

---

We Offer

• Competitive salary
• Opportunity to work with a leading European digital services company
• Professional development opportunities
• Collaborative and innovative work environment

---

About the Company

Inetum is a European leader in digital services. Our team of 28,000 consultants and specialists strive every day to make a digital impact for businesses, public sector entities, and society. 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.