Senior Oracle Dba — Lisbon, Portugal
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Senior Oracle DBA (ExaCC / Exadata) — Freelance — Lisbon, Portugal (Hybrid)
We're looking for a Senior Oracle DBA to join a freelance project via Shakers, a European tech talent marketplace. This is a specialist, optimization-focused role — day-to-day operational coverage is handled in partnership with infrastructure teams, so the focus here is performance tuning, resource efficiency, and cross-team collaboration.
What you'll do:
Optimize Oracle performance via compression, query tuning, and indexing — with a focus on ExaCC CPU efficiency, storage cost, and I/O
Fine-tune Oracle CPU allocation algorithms on ExaCC to maximize used/allocated ratio
Optimize backup and recovery on Oracle ZFS and ZDLRA appliances
Lead projects including Kerberos authentication migration and Oracle Client upgrades
Guide development teams on database design, SQL, and scalability best practices
Perform root cause analysis on performance incidents escalated from infrastructure partners
Enforce access management, TDE encryption, auditing, and audit-quality documentation
Contribute to multi-platform environments (Azure SQL, PostgreSQL, Synapse) where relevant
What you'll need:
5-10 years of hands-on production experience with Oracle databases
Proven expertise in performance tuning, compression, and resource optimization
Solid experience with Oracle RAC, Data Guard, RMAN, and OEM — must
SQL and PL/SQL scripting — must
Linux/Unix OS knowledge (primary), Windows (secondary)
Professional English, C1 spoken and written — mandatory
EU/Schengen nationality or valid Portuguese work permit
Nice to have: Hands-on ExaCC/ZFS/ZDLRA, Azure SQL/PostgreSQL/Synapse/DB2, OCP certification, French and/or Dutch, regulated-environment experience (financial services), Jenkins/UCD/Qlik Replicate/Git/ServiceNow/Jira/DBeaver. Location:
Lisbon, Portugal — hybrid.
Engagement:
Freelance, through Shakers.
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