03/18/2026 updated
100 % available
OCM 19c – Exadata / ODA / RAC / Data Guard | Senior Oracle DBA | Contract
Chorzów, Poland
Worldwide
MSc in Computer ScienceAbout me
I am an Oracle Certified Master (19c) with 10+ years of experience in Exadata, RAC, Data Guard, and mission-critical banking systems. I specialize in database architecture, high availability, and disaster recovery. Available for B2B contracts in Europe, including on-site or remote projects.
Systems EngineeringArchitectureAutomationBackup DevicesBankingBash ShellChange ManagementDatabasesData ManagementOracle Data GuardDevOpsOracle ExadataMaintenanceOracle DatabasesOracle Applications
Oracle Database Administration
- Oracle Database 11g / 12c / 19c
- RAC, Data Guard, Multitenant Architecture
- Security, Data Management, Backup & Recovery
- Performance Tuning, SQL Reporting, Patching
Oracle Engineered Systems
- Exadata & Oracle Database Appliance (ODA)
- High-performance and mission-critical database environments
Automation & DevOps
- Database automation, maintenance workflows
- Bash / Shell scripting for system administration and automation
Performance Optimization
- Advanced tuning techniques for production environments
- Patch and upgrade management
Enterprise Management Tools
- Oracle Enterprise Manager (OEM/Grid Control) for monitoring & administration
Experience
Professional experience10+ years
Freelancer since2021
Languages
EnglishFluentPolishNative speaker
Project history
Managed Oracle Exadata and Oracle Database Appliance systems, including patching, performance optimization, and high availability configuration in production environments. Administered Oracle Databases with focus on Data Guard and RAC. Designed and implemented automation solutions to streamline operations.
Administered Oracle Databases including RAC and Data Guard. Provided L3-level support, resolving major incidents for enterprise clients. Led automation initiatives to improve database maintenance workflows. Conducted backup and recovery operations, performance tuning, patching, and scripting in shell.
Managed over 200 Oracle database environments on RHEL and AIX, primarily in multitenant architecture. Administered RAC and Data Guard configurations in mission-critical environments. Conducted backup/recovery operations, advanced performance tuning, and PL/SQL development. Applied regular patching and system updates, delivered reporting solutions. Utilized Oracle Enterprise Manager for monitoring and management. Worked with Oracle Exadata systems and participated in agile development processes.