Juan Cejuela
Senior Data Scientist, Client-Side Security
Munich, Bavaria, Germany
Summary
🤩
Rockstar🎓
Top SchoolJuan Cejuela is a Senior Data Scientist specializing in client-side security at Cloudflare with 14 years of experience bridging AI, software engineering and cybersecurity. He co-founded and led tagtog, a startup focused on text annotation for ML, and holds a PhD in text mining applied to bioinformatics from TUM, reflecting deep NLP research roots. As a freelance consultant and security architect he combines hands-on AI model work, secure system design, and product leadership across startups and enterprise projects. Based in Munich, he brings a rare mix of academic rigor, startup founding experience, and practical Java-to-ML engineering, with a particular knack for turning messy training data into production-ready models.
15 years of coding experience
11 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at Aarhus UniversityIngenería en Informática (diploma/bachelor) Computer Science, Ingenería en Informática (diploma/bachelor) Computer Science at Universidad de AlcaláDoctor of Philosophy - PhD Text Mining applied to Bioinformatics, Doctor of Philosophy - PhD Text Mining applied to Bioinformatics at Technical University of Munich
English, Spanish, German
Stackoverflow
5,289reputation
1.7mreached
53answers
22questions
logging
top-5%
parsing
top-5%
docker
top-5%
Github Skills (200)
levenshtein10
python10
windows10
levenshtein-distance10
ruby10
relationship-extraction10
cython10
text-processing10
javascript10
reactive10
ecosystem10
linux10
kubectl10
ml10
sql10
Programming languages (19)
Github contributions (5)
Aryabhatta/MasterThesisLatex
Apr 2015 - Mar 2023
Contributions:20 pushes, 1 branch, 5 tags in 8 years
tagtog/tagtog-doc
Jan 2015 - Jan 2022
📖 Documentation for 🍃tagtog: The Text Annotation Tool to Train AI
Contributions:19 reviews, 18 PRs, 1470 pushes in 7 years 1 month
aitext-annotationactive-learningannotation-toolchatbots
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