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Location

Poland

Rate

$55  / per hour

Years of experience

9+

About

With over a decade of experience in Oracle APEX and PL/SQL development, I have honed my skills in building and maintaining high-quality applications, particularly in industries such as telecommunications, energy, logistics, and finance. My journey began at TBD Systemy Informatyczne, where I developed and optimized financial-accounting and contract management systems, significantly improving user experience and system performance. I have also played a key role in implementing CI/CD processes to control application deployment and database schema changes, ensuring seamless operations and adherence to Service Level Agreements (SLAs). My expertise in database management, coupled with my experience in training and client consultation, has allowed me to deliver software solutions that simplify and enhance the work of government officials and other end-users. Currently, as a Senior Oracle APEX & PL/SQL Developer and Maintenance Team Leader at Pretius Low-code, I lead a team responsible for maintaining and enhancing client systems across multiple sectors. My role involves analyzing requirements, conducting client meetings, and implementing CI/CD processes to ensure efficient application deployment. I am dedicated to providing top-notch support to clients, swiftly addressing reported issues and ensuring the smooth functioning of production systems. My experience also includes roles in quality assurance and testing, where I contributed to major projects such as Smart Dom and Cyfrowy Polsat Go, validating financial data and ensuring compliance with international standards. My career is marked by a commitment to continuous improvement, technical excellence, and delivering solutions that meet and exceed client expectations.

Tech Stack

PL/SQL, CI/CD, ETL, Git, Jira, Oracle, Scrum, SQL, SQL Server, T-SQL

Experience

  • Building, maintaining, and optimizing high-quality applications across various industries such as telecommunications, energy, logistics, and finance.
  • Implementing Continuous Integration and Continuous Deployment processes to control application deployment and database schema changes, ensuring smooth operations and adherence to SLAs.
  • Leading a team responsible for maintaining and enhancing client systems, swiftly addressing reported issues, and ensuring the smooth functioning of production systems.
  • Conducting client meetings to gather and analyze requirements, ensuring that the developed solutions align with client needs and expectations.
  • Providing training and consultation to clients, simplifying complex technical concepts, and ensuring end-users are proficient in using the developed systems.
  • Participating in quality assurance processes, validating financial data, and ensuring compliance with international standards in major projects like Smart Dom and Cyfrowy Polsat Go.
  • Managing database operations, including performance tuning and schema management, to ensure optimal application performance and data integrity.

Employment history

Oracle APEX & PL/SQL Developer | Maintenance Team Leader, Pretius Low-code January 2022 - Present
  • Building and maintaining applications in Oracle APEX & PL/SQL.
  • Analyzing requirements, conducting client meetings, system evaluation, and estimation.
  • Working with multiple international clients across various industries including telecommunications, energy, logistics, transportation, finance, and dairy.
  • Implemented new or enhanced existing CI/CD processes to ensure control over application deployment and database schema changes (GIT, Liquibase, Oracle SQLcl).
  • Organizing maintenance teams, ensuring the efficiency of existing client systems.
  • Responding to reported issues according to agreed Service Level Agreements (SLA).
  • Fixing errors reported by the client in production systems.
Oracle APEX & PL/SQL Developer, Pretius January 2020 - December 2021
  • Building and maintaining applications in Oracle APEX & PL/SQL.
  • Analyzing requirements, conducting client meetings, system evaluation, and estimation.
  • Working with multiple international clients across various industries including telecommunications, energy, logistics, transportation, finance, and dairy.
  • Implemented new or enhanced existing CI/CD processes to ensure control over application deployment and database schema changes (GIT, Liquibase, Oracle SQLcl).
Oracle APEX | PL/SQL Developer, TBD Systemy Informatyczne October 2015 - December 2019
  • Projected, developed, and tested financial-accounting systems to automate government budget planning.
  • Simplified administrative proceedings and created financial reports requested by the Supreme Audit Office.
  • Developed a contract management system, increasing client usage by 70% and doubling functionalities.
  • Optimized SQL queries, significantly improving the performance of application pages.
  • Managed effective ETL migration to new financial software, speeding up the process of granting social benefits and loans.
  • Developed reporting software to make financial data accessible to a larger user base without increasing costs.
  • Provided training and implementation support to end-users, conducting sessions for up to 100 people.
Billing Software Test Engineer / Test Coordinator, Cyfrowy Polsat December 2011 - September 2015
  • Developed and implemented projects like Smart Dom and Cyfrowy Polsat Go (Video on Demand).
  • Created T-SQL procedures for automated testing of financial data correctness.
  • Validated data according to International Financial Reporting Standards.
  • Managed test cases and coordinated testing of billing components.
  • Validated XML interfaces and configured MSSQL Server test databases.
  • Fixed bugs reported by business testers.
Quality Assurance and Supervisor at Call Center, Cyfrowy Polsat March 2010 - December 2011
  • Improved the quality of individual customer service voice calls by 90%.
  • Monitored, reported, and analyzed random incoming voice calls.
  • Provided training and feedback to call center consultants (15-20 people, with the group changing monthly).
  • Handled and resolved client complaints regarding call center customer service.
Call Center Customer Service, Cyfrowy Polsat December 2008 - March 2010
  • Maintained a positive image of the company.
  • Provided high-quality customer service during incoming voice calls.

Education history

Warsaw University of Life Sciences 2014 - 2015 Postgraduation, Databases (MS SQL Server 2012, Oracle 11g)
Warsaw University of Life Sciences 2007 - 2009 Master's degree, Tourism and recreation
Państwowa Wyższa Szkoła Zawodowa w Sulechowie 2004 - 2007 Bachelor's degree, Tourism and recreation
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