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I am a .NET Developer with over 3 years of hands-on experience in designing, developing, and testing enterprise-level applications using C#, .NET, and SQL. I am skilled in backend development, integration testing, and continuous improvement within Agile/Scrum environments. I am passionate about clean code, automation, and scalable architecture, and I enjoy collaborating with international teams. Based in Kraków/Skawina and open to remote or hybrid roles.…I am a .NET Developer with over 3 years of hands-on experience in designing, developing, and testing enterprise-level applications using C#, .NET, and SQL. I am skilled in backend development, integration testing, and continuous improvement within Agile/Scrum environments. I am passionate about clean code, automation, and scalable architecture, and I enjoy collaborating with international teams. Based in Kraków/Skawina and open to remote or hybrid roles.

Michał Kowalski

Back-End Developer, Web Developer, Front-End Developer, +2

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I am a .NET Developer with over 3 years of hands-on experience in designing, developing, and testing enterprise-level applications using C#, .NET, and SQL. I am skilled in backend development, integration testing, and continuous improvement within Agile/Scrum environments. I am passionate about clean code, automation, and scalable architecture, and I enjoy collaborating with international teams. Based in Kraków/Skawina and open to remote or hybrid roles.…I am a .NET Developer with over 3 years of hands-on experience in designing, developing, and testing enterprise-level applications using C#, .NET, and SQL. I am skilled in backend development, integration testing, and continuous improvement within Agile/Scrum environments. I am passionate about clean code, automation, and scalable architecture, and I enjoy collaborating with international teams. Based in Kraków/Skawina and open to remote or hybrid roles.

Available to hire

I am a .NET Developer with over 3 years of hands-on experience in designing, developing, and testing enterprise-level applications using C#, .NET, and SQL. I am skilled in backend development, integration testing, and continuous improvement within Agile/Scrum environments.

I am passionate about clean code, automation, and scalable architecture, and I enjoy collaborating with international teams. Based in Kraków/Skawina and open to remote or hybrid roles.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Polish

Fluent

English

Fluent

Work Experience

Back-end Developer at SIENN Poland / Exact Delft (Remote)

August 1, 2022 - November 17, 2025

Contributed to migration and development of multi-company accounting and finance platform serving high-end clients in the Netherlands and Belgium. Implemented and tested backend components using C#, .NET 4.7, MSSQL, and company-specific frameworks. Participated in Scrum ceremonies with an international team. Wrote unit, integration, and UI tests to ensure code quality. Used Azure, Jira, and Visual Studio 2022 in daily development workflows.

Back-end Developer at SIENN Poland / Exact Delft

August 1, 2022 - November 17, 2025

Contributed to migration and development of multi-company accounting and finance platform serving high-end clients in the Netherlands and Belgium. Implemented and tested backend components using C#, .NET 4.7, MSSQL, and company-specific frameworks. Participated in Scrum ceremonies, refinements, and sprint reviews with an international team. Wrote unit, integration, and UI tests using xUnit, Moq, Selenium to ensure code quality. Used Azure, Jira, and Visual Studio 2022 in daily development workflows.

IT Specialist at CELSA Huta Ostrowiec sp. z o. o.

July 31, 2022 - July 31, 2022

Maintained and supported internal IT systems and user infrastructure.

IT Specialist at CELSA Huta Ostrowiec sp. z o. o.

July 1, 2022 - July 1, 2022

Maintained and supported internal IT systems and user infrastructure.

IT Administrator at GOMED - OSTROWIEC Sp. z o. o. Sp. k.

April 30, 2022 - April 30, 2022

Managed and supported IT infrastructure, including servers, databases, and network systems.

IT Administrator at GOMED - OSTROWIEC Sp. z o. o. Sp. k.

April 1, 2022 - April 1, 2022

Managed and supported IT infrastructure, including servers, databases, and network systems.

CNC Programmer / Operator / Technician at Various employers (TEKNAMOTOR, CELSA, Birchfield Engineering, Component Supplies, MEGA-ART-MEDIA)

December 31, 2018 - December 31, 2018

Performed CNC programming, operation, and maintenance across several mechanical and engineering environments.

Technical Roles (CNC programmer, operator, technician)

January 1, 2018 - January 1, 2018

Various roles as CNC programmer, operator, and technician in mechanical and engineering environments (TEKNAMOTOR, CELSA, Birchfield Engineering, Component Supplies, MEGA - ART -MEDIA).