Wojciech Grzyb
Verified Expert in Engineering
Database Administrator and Developer
Wojciech graduated with honors from a top Polish university, where he immersed himself in his cryptology and security studies. Wojciech is also an Oracle Certified Professional with more than three years of experience as an implementation and maintenance engineer on systems based on Oracle software. Besides being perpetually keen on learning about technologies related to safe data storage, Wojciech is also interested in relational databases, graph databases, blockchain technology, and big data.
Portfolio
Experience
Availability
Preferred Environment
Git, Linux, Vim Text Editor, PyCharm
The most amazing...
...endeavor I've ever done was the cross-platform migration of an on-premise 10TB Oracle database to Oracle Cloud using the Transportable Tablespace method.
Work Experience
Software Engineer
Catholic University of Lublin
- Conducted a proof of concept in the field of Oracle Service Bus (OSB) to show the client how its use could improve system management.
- Implemented simple REST APIs in Java and PHP to create OSB services for them and thus meet the client's requirements.
- Moved the virtual machine containing the prepared solution to the Oracle cloud at the client's request.
- Configured access to the migrated virtual machine only for authorized users to increase security.
Solution Architect
TUiR Warta
- Proposed a solution that facilitates versioning and storing the change history of RPD files and OBIEE reports.
- Prepared processes and implementation models for the 20-person OBIEE development team.
- Created an unorthodox mechanism for integrating Oracle BI Repository with Bitbucket by implementing GitDriver for resolving conflicts when merging RPD files.
- Automated OBIEE configuration steps after Oracle BI Repository update to speed up and ease the development process.
Oracle Database Administrator
Canal+
- Administered and monitored Oracle databases in versions 11g and 12c, ensuring high availability of the solution.
- Provided support in the maintenance of over 200 running instances.
- Performed upgrade for older databases to version 12c and installed critical patch updates to apply security fixes.
- Proposed and implemented disaster recovery scenarios.
- Optimized SQL queries, PL/SQL procedures and functions resulting in a significant improvement in system performance.
- Prepared and performed data anonymization procedures for development and test environments.
- Automated creation of database test environments by creating Bash and Python scripts, substantially reducing the prep time.
Software Engineer
AXA Group
- Developed an innovative tool to simulate user activity in the database based on trace files.
- Conducted performance tests of Oracle databases in standalone and RAC mode, simulating the collected user traffic with the help of the created tool.
- Compared the performance of the Oracle databases in standalone and RAC mode to determine which mode better meets customer requirements.
- Recommended Oracle memory structure size fixes to improve system performance.
Oracle GoldenGate Developer
Bank Pocztowy
- Supported the maintenance of Oracle GoldenGate processes in order to ensure high availability.
- Created data mappings and transformations in GoldenGate logic and PL/SQL code to meet the client's requirements.
- Tracked and fixed bugs related to data inconsistency, improving data transformation processes.
Experience
PKW Project
https://github.com/wgrzyb/pkw_projektAs part of the project, I tried to solve the problem of durable media using blockchain and InterPlanetary File System (IPFS) technologies. I implemented a web application in Python using the Flask framework to demonstrate the solution. The created application allows you to transfer files and publish messages (pastebin) encrypted with a custom password. The uploaded files are placed and stored in IPFS. The file's obtained CID is added to the Algorand blockchain testnet to persist the information (that the file has been sent to IPFS). The application also allows you to download uploaded files and published messages.
Education
Master's Degree in Cryptology and Cybersecurity
Military University of Technology - Warsaw, Poland
Bachelor's Degree in Cryptology and Cybersecurity
Military University of Technology - Warsaw, Poland
Certifications
Oracle Database Administration 2019 Certified Professional
Oracle
Oracle Cloud Infrastructure 2019 Certified Architect Professional
Oracle
Oracle Autonomous Database Cloud 2019 Certified Specialist
Oracle
Neo4j Certified Professional
Neo4j
Oracle Cloud Infrastructure 2019 Certified Architect Associate
Oracle
Oracle GoldenGate 12c Certified Implementation Specialist
Oracle
Skills
Languages
SQL, Bash, Python, Java
Platforms
Oracle Database, Blockchain, Oracle, Linux, Oracle Enterprise Manager (EM)
Storage
Oracle DBA, Oracle PL/SQL, Oracle Database Tuning, Oracle SQL Developer, SQL Performance, Neo4j, Database Replication, Database Security, Oracle Multitenant, NoSQL, Oracle Cloud
Tools
Oracle RAC, Oracle GoldenGate, Git, PyCharm, Toad, Oracle SQL Data Modeler, Vim Text Editor, Oracle Business Intelligence Enterprise Edition 11g (OBIEE), Bitbucket, Oracle Infrastructure as a Service (IaaS)
Other
Oracle RMAN, Oracle Backups, Oracle Data Guard, Data Transformation, Cloud Migration, Oracle Performance Tuning, Information Security, Data Processing, Data Protection, Data-level Security, Tuning Advisory, Big Data, UML Diagrams, PL/SQL Tuning, Oracle Service Bus (OSB), IPFS, Cloud Security
Frameworks
Flask
Libraries/APIs
Web API, REST APIs
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring