Johannes Filter
Full-stack Software Developer And Data Scientist
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolJohannes Filter is a full-stack software developer and data scientist based in Berlin with 11 years of experience building data-driven web applications and tooling. He blends backend data engineering and NLP work in Python with modern JavaScript front-ends (React) and practical expertise in scraping and PDF processing, often applied to civic-tech and investigative projects. At AlgorithmWatch he developed systems to reverse-engineer large platforms via crowdsourcing, and as a recurring Prototype Fund grantee he has shipped open-source software funded by the German government. His open-source contributions include UI and performance improvements to a popular React Native onboarding library, showing attention to UX and scalable component design. He pairs rigorous academic training from Hasso Plattner Institute with hands-on freelance delivery, comfortable moving between research-grade data work and production-facing interfaces.
11 years of coding experience
4 years of employment as a software developer
Master of Science (M.Sc.), Computer Science, Master of Science (M.Sc.), Computer Science at Hasso Plattner InstituteExchange Student, Human Computer Interaction, Exchange Student, Human Computer Interaction at Tallinn UniversityExchange Student, Computer Science, Exchange Student, Computer Science at Universidad Nacional de Educación a Distancia - U.N.E.D.Bachelor of Science (B.Sc.), Computer Science, Bachelor of Science (B.Sc.), Computer Science at Otto-von-Guericke-Universität Magdeburg
English, German
Stackoverflow
1,903reputation
350kreached
46answers
10questions
nlp
top-5%
Github Skills (12)
javascript10
react-native10
ui-components10
flatlist9
provisioning9
nlp9
react8
mobile6
spacy6
python6
security6
brunch6
Programming languages (19)
Github contributions (5)
jfilter/react-native-onboarding-swiper
Oct 2017 - Jan 2022
🛳 Delightful onboarding for your React-Native app
Role in this project:
Front-end Developer
Front-end DeveloperContributions:141 commits, 35 PRs, 95 pushes in 4 years 4 months
Contributions summary:Johannes primarily focused on improving the user interface and overall user experience of the React Native onboarding component library. Their contributions include refactoring and refactoring UI components, such as paginators and buttons, and replacing the `ScrollView` with `FlatList` for performance enhancements. The user also addressed several bugs, updated dependencies, and added new features, like animation to page transitions. They also made contributions to propTypes and made the project adapt to orientation changes.
reactonboardingreact-nativeinstructionsreact-native-component
pd3f/pd3f
May 2020 - Apr 2021
🏭 PDF text extraction pipeline: self-hosted, local-first, Docker-based
Contributions:84 commits, 2 PRs, 35 pushes in 10 months
extractionpythonlocal-hostedlanguage-modelpdf
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