Grzegorz Goryszewski
Gdańsk
Summary
Professional with strong background in managing and optimizing database systems. Proven track record in data security, performance tuning, and disaster recovery. Collaborative team player focused on achieving results and adapting to changing needs. Skilled in SQL, database design, and automation, with reliable and flexible approach to challenges.
Overview
17
17
years of professional experience
1
1
Certification
Work History
Data Engineer
Capgemini
06.2024 - Current
- Enterprise-level data product delivery for Automotive.
- Responsible for end-to-end data pipelines (including design, monitoring, alerting, data quality, data modeling, and data governance), ETL process implementation, use case reporting, and documentation creation.
- Enhanced data quality by performing thorough cleaning, validation, and transformation tasks.
- Collaborated on ETL (Extract, Transform, Load) tasks, maintaining data integrity and verifying pipeline stability.
- Migrated legacy systems to modern technologies, improving performance and scalability while minimizing business disruption.
- Evaluated various tools, technologies, and best practices for potential adoption in the company''s data engineering processes.
Database Engineer
Amazon Web Services (AWS)
11.2021 - 05.2024
- Enterprise Clients migration to RDS Aurora Postgres
- Streamlined data migration processes, enabling seamless integration of new systems without data loss.
- Improved database security measures, conducting thorough audits to identify and rectify potential vulnerabilities.
- Enhanced database performance by optimizing stored procedures and indexes, significantly reducing query response times.
- Reduced operational costs with strategic consolidation of database servers, maximizing resource utilization.
- Boosted team productivity by introducing collaborative tools for database development and maintenance tasks.
- Reduced query execution time by analyzing and fine-tuning SQL statements in complex applications.
Software Engineer
Gemini Polska
08.2021 - 10.2021
- Data analytics project (Oracle Apex, Python, Azure, Kubernetes)
- Analyzed proposed technical solutions based on customer requirements.
- Developed scalable and maintainable code, ensuring long-term stability of the software.
- Enhanced user experience with intuitive interface design and responsive web applications.
Database Administrator
DNV
08.2020 - 07.2021
- - Exadata Cloud Service Administrator
Production Database Administrator
Ensono
09.2019 - 07.2020
- Streamlined backup and recovery processes, enhancing overall system stability and availability.
- Modified databases to meet needs and goals determined during planning process.
- Maintained high levels of customer satisfaction by consistently meeting service level agreements for database performance and availability.
- Determined database structural requirements, working with business stakeholders to identify optimal database specifications.
- Optimized database performance by monitoring health and implementing tuning recommendations.
- Developed scripts and processes for data integration and maintenance.
- Reduced operational costs by identifying and decommissioning underutilized database resources.
Database Administrator
Staples Spolka Z O.o.
05.2016 - 08.2019
- Reduced data retrieval times for business users by creating indexed views and optimizing stored procedures.
- Delivered successful database migration projects, ensuring seamless transitions with minimal disruption to business operations.
- Streamlined data retrieval and processing, designing and optimizing complex SQL queries for business intelligence.
- Ensured high availability and disaster recovery capabilities, establishing and testing robust backup and failover strategies.
- Optimized database operational efficiency by implementing automated backup and recovery procedures.
Senior Database Specialist
Nordea IT
09.2013 - 04.2016
- Senior Oracle DBA. Dealing with over 1000 databases, 11.2, 12c, RAC, Dataguard, RMAN, Exadata X4-2, X5-2 . Responsible for provisioning new instances, backup and recovery, high availability configuration, performance troubleshooting, monitoring .
Oracle DBA
Pythian
04.2013 - 06.2013
Oracle DBA
Bank BPH
10.2008 - 03.2013
- GE Money Bank/Bank BPH (2010)
- Oracle DBA 9.2, 10.2, 11.2 .
- 20 TB 4 - node RAC (with DG) 10.2 DBA
Education
Master of Science - Physics
University
GdanskSkills
- Database management
- Database monitoring
- Database troubleshooting
- Database administration
- Query optimization
- Performance tuning
- Process automation
Accomplishments
- Achieved performance improvements by introducing GIST index in Telecom Project
- Achieved many systems migration to AWS RDS Aurora Postgres
Certification
- JHipster: Build and Deploy Spring Boot Microservices
- Oracle Database 11g Administrator Certified Professional
- Oracle Database 12 Administrator Certified Professional
- Oracle Certified Expert, Oracle Real Application Clusters 11g and Grid Infrastructure Administrator
Languages
English
Timeline
Data Engineer
Capgemini
06.2024 - Current
Database Engineer
Amazon Web Services (AWS)
11.2021 - 05.2024
Software Engineer
Gemini Polska
08.2021 - 10.2021
Database Administrator
DNV
08.2020 - 07.2021
Production Database Administrator
Ensono
09.2019 - 07.2020
Database Administrator
Staples Spolka Z O.o.
05.2016 - 08.2019
Senior Database Specialist
Nordea IT
09.2013 - 04.2016
Oracle DBA
Pythian
04.2013 - 06.2013
Oracle DBA
Bank BPH
10.2008 - 03.2013
Master of Science - Physics
University
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