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Work Background
Siemens EnergySenior Software Engineer
Mar. 2025Poland● PLC Services (e.g. Modbus, OPC UA, S7) Development for a Data-Gateway in ECOMain system for the maritime industry
● co-designing solutions implemented with .NET Core (>= 8.0)
● Unit Tests, exploratory testing, documentation
4chain studioSenior QA Developer
Jul. 2024 - Dec. 2024Poland● Conducted blockchain software testing focused on the Bitcoin BSV protocol, ensuring compliance and reliability of core functionalities.
● Designed and implemented a scalable mobile automation framework using Appium, Pytest, and BrowserStack for end-to-end testing of a crypto wallet application.
● Maintained and adapted Go-based backend services to support automated test execution and QA tooling.
MUFGSenior QA Developer
Mar. 2024 - Jul. 2024Poland● Developed and implemented an automation testing framework for a banking application using Python, Pytest, and SQL (MariaDB).
● Validated critical banking logic through direct SQL queries and performed end-to-end data consistency checks across frontend, middleware, and backend layers.
● Designed reusable database fixtures and mocks to enable isolated, reliable test environments and improve test maintainability.
CloudPayQuality Assurance Developer
Nov. 2022 - Jan. 2024● Developed and maintained functional automation tests using Katalon (Groovy) and Playwright (TypeScript), including execution and root cause analysis of failures.
● Performed performance testing with Glowroot and designed a scalable performance testing framework based on JMeter.
● Contributed to the development of advanced payroll management applications within a complex enterprise-grade system.
GALAKTIC-TEC Michał PiękośQA Expert - Owner - See B2B contracts mentioned below
Jun. 2022Cracow, Małopolskie, PolandQA AUTOMATION ENGINEER, SOFTWARE DEVELOPER & DEVOPS SERVICES | 18+ YEARS IN FINTECH, BLOCKCHAIN, TELECOM, GAMING & EMBEDDED SYSTEMS Versatile technologist with 19 years of experience building test automation frameworks, developing software and implementing DevOps practices. I lead and contribute to QA, development, and operations for complex platforms in FinTech, blockchain, telecom, gaming, and embedded systems, ensuring quality, scalability, and collaboration.
IDEMIASoftware QA Engineer
Jun. 2022 - Nov. 2022Cracow, Małopolskie, Poland● Designed and implemented an automation testing framework in Java using Serenity REST for a payment tokenization platform.
● Built a comprehensive REST API testing solution with Java, JUnit, Rest Assured and Serenity-REST, covering secure transaction flows involving VISA cards, digital wallets, and alternative payment methods.
● Maintained and enhanced legacy Postman/JavaScript-based tests while developing a scalable and developer-friendly framework to support long-term system evolution.
● Closely collaborated with developers to ensure high product quality, leveraging the Service Layer Pattern to create clean, modular, and maintainable test logic.
IGSenior QA Automation Developer
Nov. 2019 - Jun. 2022Kraków Area, PolandTest Automation Development
● technology research and writing automation test frameworks for "core area" in the Trading Platform (backend tests)
● managing technical solutions for QA team, and writing tests during in-sprint work with the team (TestNG, Pytest)
● validated complex data flows and event-driven transactions coordinated
via middleware and ESB-like mechanisms (message brokers, service
buses), ensuring transactional consistency and accurate state
propagation across the system.
● documenting work and incoming processes
● developing a Way Of Working for QA team in the "core area" department
● some DevOps work
EricssonSenior Software (&Automation) Developer
Aug. 2018 - Oct. 2019Cracow, Lesser Poland District, Poland● Developed transport layer components of the TCP/IP stack with a focus on LTE and 5G technologies, using C/C++.
● Created automation tests using the gMock (Unit Tests) and Java/JCat e2e framework to ensure reliability and protocol compliance.
● Wrote Python scripts to support CI/CD pipelines, improving automation and delivery efficiency.
● Collaborated closely with cross-functional teams to co-design and implement innovative features across the telecom stack.
Trust4TechOwner/Freelancer
Nov. 2017 - Sep. 2018Cracow, Lesser Poland District, PolandOwner and Programmer
● WWW websites
● Newsletters
● other IT Services
Mint of PolandSenior Software Developer
Sep. 2016 - Dec. 2017Cracow, Lesser Poland District, Poland● Developed cashless payment systems using C, C++, C#, and the Qt framework on Linux/Unix platforms (Debian), including work with D-Bus and modifications to core OS components and drivers.
● Created embedded software for metro ticket machines and public transport validators.
● Managed integration, configuration, and end-to-end testing of custom solutions.
● Delivered high-quality customer support, ensuring smooth deployments and maintaining strong client relationships.
SWA Software Wizards Austria GmbH - partner of NovomaticGame Developer C++
Jul. 2015 - Sep. 2016Traun, Austria● Developed high-resolution reel-based betting games using MS Visual C++ 2010/2013 and proprietary internal graphics engines.
● Implemented enhancements to the visual engine and contributed to redesigns of core gameplay elements and user experience components.
● Actively participated in requirements analysis, creative feature ideation, and feasibility assessments during iterative development cycles.
● Executed manual and UX testing for visual fidelity and gameplay smoothness across platforms.
● Worked in cross-functional teams using Jira, Redmine, Confluence, Photoshop, and various internal tools to align development, testing, and design efforts.
NOVOMATIC Technologies PolandDeveloper C++
Nov. 2008 - Jun. 2015Cracow, Lesser Poland District, Poland● Developed high-resolution reel-based betting games using MS Visual C++ 2010/2013 and proprietary internal graphics engines.
● Implemented enhancements to the visual engine and contributed to redesigns of core gameplay elements and user experience components.
● Actively participated in requirements analysis, creative feature ideation, and feasibility assessments during iterative development cycles.
● Led technical aspects of test automation and CI/CD integration using Jenkins, covering game math validation, UX consistency, and real-time interaction logic.
● Created robust Python-based automated test suites for mathematical models and gameplay scenarios, supporting continuous integration and regression testing.
● Mentored team members and coordinated task distribution across a rotating Agile team structure (Scrum and Kanban).
● Executed manual and UX testing for visual fidelity and gameplay smoothness across platforms.
● Worked in cross-functional teams using Jira, Redmine, Confluence, Photoshop, and various internal tools to align development, testing, and design efforts.
IGE+XAOC++ Developer
Dec. 2007 - Oct. 2008Cracow, Lesser Poland District, Poland● Developed an advanced CAD application for designing electrical installations, tailored to international enterprise clients such as Airbus and other aerospace and defense manufacturers (including rocket launcher systems).
● Worked with MS Visual C++ 6.0 (MFC) and MS Visual Basic to build and extend a feature-rich design environment, addressing graphical and architectural complexities.
● Engineered new features for electrical design workflows, focusing on precision, performance, and usability in large-scale technical schematics.
● Collaborated directly with clients, testers, and stakeholders to ensure high-quality feature delivery aligned with real-world engineering needs in highly regulated industries.
● Navigated challenges of legacy code, performance optimization, and plugin integration while maintaining a stable development environment.
● Promoted synergy between development, QA, and support teams to validate technical solutions and improve delivery processes.
● Used Redmine for coordination, issue tracking, and agile-style collaboration across multiple release cycles.
ComarchSoftware Engineer (QA)
Aug. 2006 - Nov. 2007Cracow, Lesser Poland District, Poland● Executed full-cycle software testing across all phases of the Software Development Life Cycle (SDLC) and Software Testing Life Cycle (STLC).
● Designed and implemented automated tests using PL/SQL, focusing on database-driven validation of business logic and transactional integrity.
● Created detailed test plans and documentation for a complex billing system composed of three integrated modules: a Unix-based core application, an Oracle 9i database, and a web-based frontend.
● Performed rigorous black-box testing based on business rules encoded in stored procedures and views, ensuring accuracy across data layers.
● Administered Oracle environments for test setup and teardown, including the creation of SQL scripts and test datasets.
● Participated in performance profiling of PL/SQL functions, identifying optimization opportunities and collaborating on enhancements.
● Maintained and administered the test environment, including Linux, IBM, Solaris servers, and Oracle databases.
● Reported and tracked bugs using Jira and Test Manager, delivering high-quality defect documentation and root cause analysis.
● Actively engaged in cross-team meetings with developers and implementation specialists to ensure testing alignment and issue resolution.
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