Maciej Obarski - Owner at Data Geek

Maciej Obarski

Owner at Data Geek

Warsaw, Masovian Voivodeship, Poland

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Summary

👤

Senior

🎓

Top School

Maciej Obarski is a seasoned data professional and founder of Data Geek, blending nine years of experience across data engineering, data science, applied AI, and software development. His work spans media, advertising, banking, and telecom, including senior data science leadership at TVN Discovery Polska where he built audience planning platforms, recommendation engines, A/B/multivariate testing systems, and scalable NLP analytics. In 2024 he served as Lead Data Scientist at Surfshark, applying data-driven approaches to security and privacy-focused products. An active open-source contributor, he has advanced AI tooling from AI-Bricks and Ask-My-PDF to enhancements in the V language regex module, reflecting a breadth from language tooling to AI agents. Based in Warsaw, Poland, he holds an MSc in Electronics and Telecommunications from Poznan University of Technology and continues to translate complex data challenges into practical, production-ready solutions.

10 years of coding experience

14 years of employment as a software developer

MSC, Electronics and Telecommunications, MSC, Electronics and Telecommunications at Poznan University of Technology

Github Skills (29)

openai-api10

python10

pdf10

regex10

compiler-compiler10

compiler10

streamlit10

regexp10

v-lang10

compilers10

testing9

programming-language9

front-end-development9

programming-languages9

frontend-development9

Programming languages (3)

CVPython

Github contributions (5)

mobarski/ask-my-pdf

Jan 2023 - Mar 2023

Question answering system for PDF files

Role in this project:

Full-stack Developer

Contributions:1 review, 112 commits, 80 PRs in 2 months

Contributions summary:Maciej primarily contributed to the development of the "Ask my PDF" application, a question-answering system for PDFs. Their work involved implementing features and fixing bugs across multiple files, including modifications to the user interface (GUI), and backend logic. The user made iterative improvements, refining the application's functionality, including PDF reader enhancements, and introducing features like temperature control, HyDE, and task prompts. These changes show a strong understanding of both the frontend and backend aspects of the project.

gpt3openaiopenai-apipdfqna

vlang/v

Jul 2020 - Sep 2020

Simple, fast, safe, compiled language for developing maintainable software. Compiles itself in <1s with zero library dependencies. Supports automatic C => V translation. https://vlang.io

Role in this project:

Back-end Developer

Contributions:2 reviews, 11 commits, 13 PRs in 1 month

Contributions summary:Maciej primarily contributed to the V programming language's regex module. Their work involved adding new options and interfaces to the regex module, enhancing its functionality. They also focused on improving the testing suite by creating and modifying tests for the regex module, covering areas like capturing groups, find all, and replace functionality, and adding direct array access feature, and os file handling.

dependenciesdevelopingzerotranslationcompiled-language

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