Oracle DBA

<!--block-->Role description and responsibilities

• <!--block-->Optimise Oracle database performance through compression techniques, query tuning and indexing strategy — with a focus on ExaCC CPU efficiency, storage cost reduction and I/O efficiency
• <!--block-->Fine-tune Oracle CPU allocation algorithms on ExaCC to maximise the used/allocated ratio and minimise waste
• <!--block-->Optimise backup and recovery processes for Oracle ZFS and ZDLRA appliances, ensuring reliability and cost-effectiveness
• <!--block-->Lead and support key projects, including migration to Kerberos authentication and Oracle Client upgrades
• <!--block-->Guide development teams on best practices for database design, SQL coding, performance and scalability
• <!--block-->Perform root cause analysis on performance incidents and complex database issues escalated from infrastructure partners
• <!--block-->Enforce access management, TDE encryption, auditing controls and audit-quality documentation
• <!--block-->Contribute to multi-platform environments (Azure SQL, PostgreSQL, Synapse) where relevant
• <!--block-->Collaborate with infrastructure partners, development teams and project stakeholders across initiatives

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<!--block-->Requirements

• <!--block-->University degree in Computer Science, Engineering or comparable technical field
• <!--block-->5–10 years of hands-on experience with Oracle databases in production environments
• <!--block-->Proven expertise in performance tuning, compression and resource optimisation
• <!--block-->OS knowledge: Linux and/or Unix (primary), Windows (secondary)
• <!--block-->Oracle RAC, Data Guard, RMAN, Oracle Enterprise Manager (OEM)
• <!--block-->SQL and PL/SQL scripting (mandatory)
• <!--block-->ExaCC CPU optimisation, compression techniques, query tuning, Exadata awareness
• <!--block-->Kerberos authentication and Oracle Client upgrades
• <!--block-->Transparent Data Encryption (TDE), auditing & compliance controls
• <!--block-->Professional English C1 (spoken and written) — mandatory
• <!--block-->Strong collaboration skills — comfortable working with infrastructure partners, development teams and non-technical stakeholders
• <!--block-->Structured problem-solving mindset; ability to communicate technical findings clearly
• <!--block-->Generalizing-specialist profile — open to working across multiple database technologies
• <!--block-->Must own a valid work permit or EU/Schengen Space nationality to legally work in Portugal
• <!--block-->Lisbon/Portugal-based — hybrid working model

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<!--block-->Nice to have

• <!--block-->Hands-on experience with ExaCC, ZFS and ZDLRA
• <!--block-->Azure SQL or PostgreSQL, Azure Synapse or DB2 knowledge
• <!--block-->Tools: Jenkins, UrbanCode Deploy, Qlik Replicate, Git/Bitbucket, ServiceNow, Jira, DBeaver
• <!--block-->Oracle Certified Professional (OCP) or equivalent certification
• <!--block-->French and/or Dutch language skills
• <!--block-->Experience in regulated environments (e.g., financial services)