Jonas Schaefer
Web Development Strategist
Indianapolis, Indiana, United States
Summary
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Rockstar🎓
Top SchoolJonas Schaefer is a bilingual web development strategist with 16 years of experience building accessible, AI-enabled digital tools for education, research, and finance. He blends front-end and back-end skills (JavaScript, Python, Streamlit, SQL) with CMS strategy and automation to turn messy requirements into fast, user-friendly systems that scale. His portfolio includes a $100k interactive digital humanities timeline, campus-wide CMS migrations that improved load times and accessibility, and financial tools with real-time sync and admin controls. Jonas also contributes to open-source infrastructure—working on projects like xmpp.org, Prosody, and PowerDNS—demonstrating practical server-side and tooling improvements. Comfortable in cross-functional environments, he pairs analytics-driven decisions with WCAG-focused design and performance budgets to reduce friction for content teams. Based in Indianapolis, he’s particularly interested in AI-driven workflows that automate routine work and amplify institutional impact.
16 years of coding experience
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Marian University IndianapolisGerman Abitur (Higher Education Entrance Qualification), Mathematics & Sport, German Abitur (Higher Education Entrance Qualification), Mathematics & Sport at Modellschule ObersbergBachelor of Science - BS, Business Informatics, Bachelor of Science - BS, Business Informatics at DHBW Mannheim
Stackoverflow
20,420reputation
2.0mreached
230answers
12questions
merge
top-1%
networking
top-5%
python
top-1%
python-datetime
top-5%
argparse
top-5%
git
top-5%
Github Skills (45)
json10
authorisation10
xserver10
xmpp10
website-development10
python10
dns-resolver10
powerdns10
authority10
merge10
lua10
pelican10
dnssec10
dns10
nameserver10
Programming languages (32)
Github contributions (5)
xsf/xmpp.org
Jul 2016 - Aug 2022
xmpp.org website (builds: https://github.com/xsf/xmpp.org/actions)
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:12 reviews, 136 commits, 94 PRs in 6 years 2 months
Contributions summary:Jonas primarily contributed to the website's backend and front-end development. They refactored the codebase to use dynamic JSON-based listings for software, including servers, clients, and libraries. This involved modifying Pelican configuration files, creating Python scripts for data manipulation, and updating the website's HTML templates. Furthermore, the user implemented improvements to the linting tool and README files to aid in maintenance and contribution.
buildstravisxmpptravis-ci
bjc/prosody
Dec 2017 - Oct 2022
IMPORTANT: due to a drive failure, as of 13-Mar-2021, the Mercurial repository had to be re-mirrored, which changed every commit SHA. The old SHAs and trees are backed up in the vault branches. Please migrate to the new branches as soon as you can.
Role in this project:Back-end Developer
Back-end DeveloperContributions:74 commits in 4 years 10 months
Contributions summary:Jonas primarily contributed to the `bjc/prosody` repository, a XMPP server, by fixing bugs and implementing features related to Multi-User Chat (MUC) functionality. Their work included addressing issues in history replay, ensuring correct handling of the `<delay/>` element, and emitting status codes as per XEP-0045. They also worked on pubsub module by fixing the form fields. Furthermore, the user made modifications to `prosodyctl` to include external connectivity checks using the observe.jabber.network API and added metrics.
mercurialshavaultxmppxmpp-server
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