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Work Background
Senior Software Engineer
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
Senior QA Developer
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.
Senior QA Developer
MUFGSenior QA Developer
Feb. 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.
Quality Assurance Developer
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.
QA Expert - Owner - See B2B contracts mentioned below
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.
Software QA Engineer
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.
Senior QA Automation Developer
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
Senior Software (&Automation) Developer
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.
Owner/Freelancer
Trust4TechOwner/Freelancer
Nov. 2017 - Sep. 2018Cracow, Lesser Poland District, PolandOwner and Programmer ● WWW websites ● Newsletters ● other IT Services
Senior Software Developer
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.
Game Developer C++
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.
Developer C++
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.
C++ Developer
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.
Software Engineer (QA)
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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