10/11/2026 updated
100 % available
Senior Database Administrator & Technical Consultant | Oracle, PostgreSQL, Cloud & AI
Warszawa, Poland
Worldwide
B.Sc. in Computer ScienceAbout me
25+ years in database engineering (Oracle, PostgreSQL, Cloud). AI enthusiast. Coffee lover. Off-terminal, I analyze the stock market, hit the gym, and enjoy Italian cars. Core rule: keep queries fast, coffee strong, and production dead silent on weekends.
Oracle Data GuardPostgreSQLOracle DatabasesOracle RacPerformance ImprovementOracle 10g/11gSybaseOracle Golden GateOracle Cloud InfrastructureSql Database Administration
Database Administration
Over 25 years of experience architecting, managing, and optimizing enterprise-grade database environments including Oracle (8i-19c, RAC, Data Guard, ASM, OEM, GoldenGate), PostgreSQL, MySQL with HeatWave, Sybase (12-15, Replication Server), MS SQL Server, and Informix.
Cloud & AI Infrastructure
Expertise in Oracle Cloud Infrastructure (OCI), Enterprise AI integration including Vector Search and LLM data preparation, Azure Fundamentals, Autonomous Database deployment, and MySQL HeatWave on Oracle Cloud. Holder of multiple 2025 Oracle Cloud and AI certifications.
Performance Tuning & Cross-Platform Migration
Proven track record in executing complex cross-platform database migrations with minimal downtime, advanced performance query tuning for mission-critical high-volume transactional databases, and storage modernization including migration of disk shares to Oracle ACFS.
Storage & High-Availability Infrastructure
Deep knowledge of Oracle ASM Cluster File System (ACFS), High-Availability Clustered Environments, Disaster Recovery Configurations (DRC), and storage modernization strategies for enterprise environments.
Automation & Programming
Proficiency in Unix/Linux Shell Scripting (Bash/Korn), PL/SQL, T-SQL, Perl, PHP, C/C++, and Java. Development of custom automated algorithms and shell tools for partition maintenance and routine administrative task automation.
Operating Systems
Hands-on experience with Linux (Mint/RHEL), IBM AIX, HP-UX, Sun Solaris, Windows Server, and OpenVMS in enterprise production environments.
Tools & Monitoring Utilities
Practical use of NetWorker, Commvault, Patrol, Zabbix, Oracle Enterprise Manager (OEM), and NetBackup for enterprise backup, monitoring, and compliance management.
Machine Learning & Data Analytics
Certified in Oracle AI Vector Search, AI in Business Development (Google), and Oracle Data Platform Foundations. Skills include Vector Search, Machine Learning integration, Google BigQuery, and Data Analytics Infrastructure.
Replication & Data Recovery
Configuration and maintenance of replication and data recovery strategies utilizing Oracle GoldenGate, Data Guard, ASM, and Sybase Replication Server across financial and telecommunications environments.
Over 25 years of experience architecting, managing, and optimizing enterprise-grade database environments including Oracle (8i-19c, RAC, Data Guard, ASM, OEM, GoldenGate), PostgreSQL, MySQL with HeatWave, Sybase (12-15, Replication Server), MS SQL Server, and Informix.
Cloud & AI Infrastructure
Expertise in Oracle Cloud Infrastructure (OCI), Enterprise AI integration including Vector Search and LLM data preparation, Azure Fundamentals, Autonomous Database deployment, and MySQL HeatWave on Oracle Cloud. Holder of multiple 2025 Oracle Cloud and AI certifications.
Performance Tuning & Cross-Platform Migration
Proven track record in executing complex cross-platform database migrations with minimal downtime, advanced performance query tuning for mission-critical high-volume transactional databases, and storage modernization including migration of disk shares to Oracle ACFS.
Storage & High-Availability Infrastructure
Deep knowledge of Oracle ASM Cluster File System (ACFS), High-Availability Clustered Environments, Disaster Recovery Configurations (DRC), and storage modernization strategies for enterprise environments.
Automation & Programming
Proficiency in Unix/Linux Shell Scripting (Bash/Korn), PL/SQL, T-SQL, Perl, PHP, C/C++, and Java. Development of custom automated algorithms and shell tools for partition maintenance and routine administrative task automation.
Operating Systems
Hands-on experience with Linux (Mint/RHEL), IBM AIX, HP-UX, Sun Solaris, Windows Server, and OpenVMS in enterprise production environments.
Tools & Monitoring Utilities
Practical use of NetWorker, Commvault, Patrol, Zabbix, Oracle Enterprise Manager (OEM), and NetBackup for enterprise backup, monitoring, and compliance management.
Machine Learning & Data Analytics
Certified in Oracle AI Vector Search, AI in Business Development (Google), and Oracle Data Platform Foundations. Skills include Vector Search, Machine Learning integration, Google BigQuery, and Data Analytics Infrastructure.
Replication & Data Recovery
Configuration and maintenance of replication and data recovery strategies utilizing Oracle GoldenGate, Data Guard, ASM, and Sybase Replication Server across financial and telecommunications environments.
Experience
Professional experience10+ years
Freelancer since2017
Languages
EnglishFluentPolishNative speaker
Project history
Delivering end-to-end database administration, maintenance, and optimization for large-scale enterprise environments running Oracle (11g/19c RAC), PostgreSQL, and MySQL. Executing comprehensive database performance query tuning, managing complex cross-platform database migrations, spearheading storage infrastructure modernization including migration to Oracle ACFS, developing custom automated algorithms for partition maintenance, and acting as Technical Advisor in cross-functional project meetings.
Managed massive, complex multiregional Oracle installations (10g-12c RAC, Private Cloud) ensuring 24x7x365 high availability for core financial systems (Mantas, Olympia). Executed end-to-end Oracle database cross-platform migrations to private cloud infrastructure, configured replication and data recovery using Oracle GoldenGate, Data Guard, and ASM, and supervised enterprise backup and monitoring systems via NetBackup and Patrol.
Administered large-scale Sybase (12-15), Oracle (8i-11g RAC, Advanced Replication), and MS SQL Server environments supporting core telecom billing architectures (SPECTRUM 2000). Optimized storage consumption through historical data archiving, compression techniques, and automated partition management. Developed Unix/Linux shell scripts, PL/SQL, and T-SQL stored procedures, and architected a custom internal Sybase performance monitoring portal based on Tomcat, JSP, and Google Charts.
Certificates
AWS Partner: Sales Accreditation (Business)
AWS2026
AWS Partner: Accreditation ( Technical)
AWS2026
AWS Technical Essentials
AWS2026
MySQL HeatWave Implementation Certified Associate
Oracle2025
AI in business development
Google2025
Oracle AI Vector Search Certified Professional
Oracle2025