Mariusz Szczepańczyk is a seasoned Python developer with 14 years of cross-domain experience building embedded systems, media platforms, and full-stack web applications. He has shipped production software in C/C++ for set-top boxes and kernel modules, led small engineering teams to build SaaS products, and recently focused on fleet management and enterprise projects using Go, Python, React and TypeScript. At open-source level he improved GIF handling in the widely used OpenImageIO project, showing attention to multimedia semantics, build stability and backward-compatible fixes. Comfortable with end-to-end delivery, he has integrated complex payment systems and authored scalable serverless media workflows using FFmpeg and AWS Lambda. Currently based in Warsaw, he combines low-level systems instincts with modern web and cloud practices, and contributes pragmatic, testable improvements rather than one-off patches.
13 years of coding experience
12 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at University of Warsaw
Reading, writing, and processing images in a wide variety of file formats, using a format-agnostic API, aimed at VFX applications.
Role in this project:
Back-end Developer
Contributions:10 commits, 1 comment in 8 months
Contributions summary:Mariusz primarily contributed to the GIF input plugin within the openimageio repository. Their work involved significant improvements, including fixing subimage generation, respecting disposal methods for frame handling, and adding the gif:LoopCount attribute. These changes enhanced the plugin's functionality and compatibility with GIF animations. Furthermore, they addressed compilation errors and fixed compiler warnings, indicating a focus on code quality and build stability.
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Mariusz Szczepańczyk - Python Developer at Zurich Insurance