Harald Schilly
IT Consultant at CoCalc: Collaborative Calculation and Data Science
Austria
Summary
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Rockstar🎓
Top SchoolHarald Schilly is an experienced IT consultant and developer with 18 years building mathematical and web software, currently contributing to CoCalc and the Sage ecosystem. Trained as a mathematician at the University of Vienna, he blends deep mathematical optimization knowledge with practical engineering in Python, TypeScript, Linux and full-stack web development. His open-source work includes meaningful contributions to high-profile projects like SageMath and the LMFDB, where he implemented UI features, content systems and backend data tooling. Comfortable across languages from R and Java to Go, he’s equally at home crafting frontend UX tweaks and backend data engines—an unusual mix that reflects both research roots and production-grade delivery.
18 years of coding experience
Mag. rer. nat., Mathematics, Mag. rer. nat., Mathematics at University of ViennaMaster of Science (MS), Mathematics, Master of Science (MS), Mathematics at Universität Wien
English, German
Stackoverflow
1,108reputation
3.3mreached
33answers
3questions
Github Skills (23)
markdown10
javascript10
website-development10
python10
css10
flask-ask10
mongodb-database10
markdown-it10
front-end-development10
html10
mongodb10
flask10
jinja29
jinjava9
version-control6
Programming languages (20)
Github contributions (5)
sagemath/website
Apr 2013 - Jan 2023
Source for https://www.sagemath.org/; submit Issues/PRs here to update the website
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:48 reviews, 807 commits, 319 PRs in 9 years 11 months
Contributions summary:Harald's initial commit introduced the current website with JavaScript code. Subsequent commits focused on modifying HTML templates, CSS, and JavaScript files to enhance the website's functionality and user interface. The user also implemented features such as a random link display, and changes to the site's navigation, indicating a focus on both frontend and backend aspects of the website's development. The user also migrated to the more modern Cocalc platform for some functionality.
sagemath
LMFDB/lmfdb
Feb 2011 - Nov 2015
L-Functions and Modular Forms Database
Role in this project:Back-end Developer & Data Engineer
Back-end Developer & Data EngineerContributions:602 commits, 6 PRs, 37 pushes in 4 years 9 months
Contributions summary:Harald contributed to the LMFDB by adding a "wiki"-style system, including the ability to display information and links to objects. The focus was on knowl (knowledge) related features such as creating pages, providing a search function, adding parameters to display information and generating the content.
database-designdatabasemodular
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