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Location

Poland

Rate

$45  / per hour

Years of experience

30+

About

I am an experienced IT professional with a strong background in PL/SQL development, database integration, and software development across various industries. Currently, I work at AXA Polska S.A. as a PL/SQL Developer, where I contribute to project planning and requirement analysis for high-budget projects. My role involves developing and implementing caching strategies using Redis, resulting in significant performance improvements. Additionally, I assist in creating technical documentation using Swagger, ensuring clear communication and project maintainability. My expertise extends to optimizing database schemas and queries, leveraging tools like Oracle SQL Developer, PowerBuilder, and Informatica PowerCenter. Throughout my career, I have held various roles, including Configuration Manager, Integrator, and Developer at Magneti Marelli Elektronische Systeme GmbH, where I was responsible for integrating and releasing embedded software for automotive dashboards. At Generali in both Switzerland and Poland, I focused on database development and integration, handling complex data warehouse projects and migrations. My experience also includes leading software design at atg test systems GmbH and programming for international teams at IBM Deutschland. With a Master's degree in Mechatronics from Warsaw University of Technology and proficiency in multiple languages and technologies, I am well-equipped to tackle diverse IT challenges.

Tech Stack

SQL, HTML, JavaScript, JQuery, PL/SQL, XML

Experience

  • Optimized large-scale platforms by developing and implementing caching strategies using Redis and optimizing database schemas and queries, resulting in significant performance improvements, such as a 25% reduction in page load times.
  • Developed and integrated complex data warehouses and managed consecutive DWH versions using PL/SQL and Informatica PowerCenter, ensuring robust data management and seamless system operations.
  • Led the migration of legacy systems to new platforms, such as transitioning from Sybase to Oracle and updating life insurance systems to Graphtalk AIA, which modernized application architectures and improved maintainability.
  • Spearheaded the development of embedded software for automotive dashboards at Magneti Marelli Elektronische Systeme GmbH, ensuring integration and release of OSEK-based systems for high-profile clients like Porsche and Audi.
  • Participated in Agile development methodologies, attending daily stand-ups, sprint planning meetings, and contributing to project progress and team coordination, ensuring efficient and timely project delivery.
  • Created and maintained technical documentation using tools like Swagger, enhancing knowledge sharing and project maintainability by clearly representing endpoints, request/response structures, and authentication methods.
  • Utilized a variety of tools and technologies, such as Oracle SQL Developer, PowerBuilder, PowerDesigner, Informatica PowerCenter, and Unix scripting, to develop and maintain applications, ensuring high performance, reliability, and scalability.

Employment history

PL/SQL Developer, Generali Switzerland October 2018 – Present

• Performed regular maintenance and updates on existing insurance systems, ensuring data integrity and system reliability through meticulous troubleshooting and bug fixing using Oracle SQL Developer and PL/SQL.
• Developed and executed complex queries and stored procedures to support business operations, leveraging tools such as PowerBuilder and scripting languages like Perl and Unix shell scripts for efficient data manipulation and reporting.
• Collaborated with cross-functional teams to design and implement enhancements to insurance systems, utilizing Automic AWA for automation and Visual Studio/.Net for integrating new functionalities, thus improving overall system performance and user experience.

PL/SQL Developer, Generali Poland October 2017 – June 2018

• Designed and developed database components to support the INSIS insurance system, creating efficient PL/SQL code, stored procedures, triggers, and functions to handle complex business logic and data processing.
• Collaborated with business analysts and stakeholders to gather and understand requirements, translating them into technical specifications and ensuring the new system met business needs and regulatory requirements.
• Conducted comprehensive testing and debugging of the database components, performing unit tests and collaborating with QA teams to ensure the reliability, performance, and accuracy of the new insurance system before deployment.

Informatica PowerCenter Developer, Societe Generale Corporate & Investment Banking Poland (B2B) January 2017 – September 2017

• Designed and developed ETL processes using Informatica PowerCenter to extract, transform, and load accounting data from various source systems into the data warehouse, ensuring accurate and timely financial reporting.
• Optimized and maintained ETL workflows and mappings, implementing performance tuning techniques to improve data processing efficiency and reduce load times, thus enhancing the overall reporting process.
• Collaborated with finance and accounting teams to understand reporting requirements, developing and customizing reports and dashboards to provide actionable insights and support decision-making processes.

PL/SQL and Informatica PowerCenter Developer, mBank S.A. November 2015 – December 2016

• Implemented data integration solutions using PL/SQL and Informatica PowerCenter, ensuring seamless data flow between various systems and the data warehouse, thereby supporting comprehensive data analysis and reporting needs.
• Managed version control and release processes for the data warehouse, coordinating with development and operations teams to deploy new versions, patches, and updates, ensuring minimal disruption to business operations.
• Conducted data quality checks and validation procedures, utilizing Informatica Data Quality tools and custom PL/SQL scripts to ensure the accuracy, consistency, and integrity of data loaded into the data warehouse, thereby maintaining high standards for data governance.

PL/SQL Developer, Finnova AG Bankware January 2015 – October 2015

• Developed and maintained PL/SQL scripts and stored procedures to support portfolio management operations, ensuring efficient data processing and accurate financial calculations within the system.
• Collaborated with portfolio managers and analysts to gather requirements and provide technical solutions for portfolio tracking, risk assessment, and performance reporting, ensuring the system met the dynamic needs of the investment team.
• Optimized database performance and resource utilization, implementing indexing, partitioning, and query optimization techniques to handle large volumes of financial data, thus enhancing system responsiveness and reliability.

Database Developer, AXA Polska S.A. August 2008 – December 2014

• Executed data migration strategies, utilizing PL/SQL and Informatica PowerCenter to transfer and transform data from legacy life insurance systems to the new Graphtalk AIA system, ensuring data accuracy and integrity throughout the process.
• Developed and maintained database schemas and structures using PowerDesigner, creating and updating tables, indexes, and relationships to support the new system’s requirements and enhance performance.
• Provided ongoing support and maintenance for the Graphtalk AIA system, troubleshooting issues, performing regular updates, and optimizing the system to ensure smooth operations and minimize downtime for end-users.

Configuration Manager, Integrator & Developer, January 2001 – July 2008

• Coordinated with cross-functional teams to manage the integration of software modules, ensuring that all components worked seamlessly together and met the stringent quality and performance standards required for automotive applications.
• Developed and maintained build scripts and automation tools using Linux scripting and make files, streamlining the build and deployment processes for embedded software across multiple vehicle models, thereby reducing development time and minimizing errors.
• Performed rigorous testing and validation of embedded software modules, including Board Computer and External Temperature modules, using a combination of automated testing frameworks and manual testing techniques to ensure compliance with automotive industry standards and client specifications.

Lead Software Designer, DAEWOO-ŻYCIE TU S.A May 1999 – December 2000

• Designed and implemented core business applications, leveraging PowerBuilder and Informix to create robust, scalable software solutions that supported the company’s strategic objectives and operational needs.
• Led software architecture and design efforts, defining system structures, components, and interfaces to ensure that the software met performance, scalability, and maintainability requirements.
• Mentored and guided junior developers, providing technical leadership, conducting code reviews, and sharing best practices to foster a culture of continuous improvement and high-quality software development within the team.

IT Supervisor, CIGNA STU ŻYCIE S.A September 1997 – February 1999

• Managed the company’s IT infrastructure, ensuring the optimal performance and security of all hardware and software systems, including servers, networks, and workstations, to support business operations effectively.
• Developed and implemented IT policies and procedures, establishing guidelines for data management, system security, and user access to maintain a secure and efficient IT environment.
• Provided technical support and training to staff, equipping users with the knowledge and skills needed to effectively utilize the company’s software for group life insurance and other IT resources, thus enhancing overall productivity and reducing downtime.

Programmer, ATG Test Systems GmbH / Warsaw Software Group October 1994 – December 1996

• Developed and optimized embedded software algorithms, utilizing C/C++ to ensure the accurate and efficient functioning of the automatic MCM board tester, meeting the stringent performance criteria set by Hitachi Ltd.
• Collaborated with international teams, coordinating with engineers and developers from IBM Deutschland and other global locations to integrate various software components, troubleshoot issues, and ensure seamless interoperability of the system.
• Conducted rigorous testing and validation of embedded software, designing and executing test plans to verify the functionality, reliability, and robustness of the MCM board tester under various operating conditions and scenarios.

Education history

Copernicus High School September 1986 - May 1990
Warsaw University of Technology October 1998 - May 2000 M. Sc., Department of Mechatronics, specialized in Robotics
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