Sergios Kefalidis is a PhD candidate and researcher at the National and Kapodistrian University of Athens with seven years of hands-on experience in NLP, question answering, large language models and the Semantic Web. He combines rigorous academic training (MSc 9.73/10) with practical research on EU- and ESA-funded projects such as STELAR and a Digital Twin Earth demonstrator under Prof. Manolis Koubarakis. An active open-source maintainer and contributor, he shipped major fixes and features for projects like MuseScore and Xfce (including leading Xfce Terminal to a 1.0.0 release) and mentors GSoC students. Comfortable across research, teaching and full-stack development, he uniquely bridges experimental ML research with production-quality software engineering. Raised in suburban Athens, he brings a long-standing, curiosity-driven relationship with computers that began with Warcraft III and matured into a career blending creative problem-solving and systems-level thinking.
7 years of coding experience
3 years of employment as a software developer
Doctor of Philosophy - PhD in Question-Answering and Natural Language Processing, Computer Science, Doctor of Philosophy - PhD in Question-Answering and Natural Language Processing, Computer Science at National & Kapodistrian University of Athens
MuseScore is an open source and free music notation software. For support, contribution, bug reports, visit MuseScore.org. Fork and make pull requests!
Role in this project:
Full-stack Developer
Contributions:17 reviews, 34 commits, 62 PRs in 11 months
Contributions summary:Sergios primarily contributed to the MuseScore project by fixing bugs and implementing small features. They addressed issues related to text editing functionality, such as highlighting text and deleting words. They also worked on UI elements, specifically within the edit style UI, fixing clipping issues. Further contributions included adding dark mode to the timeline and updating preference dialog signals and slots.
Contributions:48 commits, 10 PRs, 65 pushes in 1 year 5 months
2d-gamegamerpggame-devdialogue-systems
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