Teffen Ellis
Telecommunications Data Engineer
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolTeffen Ellis is a Telecommunications Data Engineer and senior full-stack developer with 12 years of experience building production web and spatial systems from Paris. He blends hands-on engineering, product leadership and regulatory compliance—GDPR, CCPA and WCAG—into tools that win funding and drive market expansion, most recently shaping a BEAD-focused spatial suite for ISPs. As founder of a boutique agency and former principal engineer at Coder and Flume, he’s led front-end architecture, geo-spatial analytics, and up-skilled teams while shipping customer-facing portals and network management stacks. Teffen is an active open-source contributor, improving UX and authentication flows in projects like authentik and helping maintain the browser VS Code fork code-server. He also experiments with higher-order prompt functions for LLMs, a practical R&D thread that surfaced in AI products at The.com and earlier platform work. Curious and product-minded, he pairs startup grit with disciplined engineering and documentation practices.
12 years of coding experience
9 years of employment as a software developer
Bachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Lawrence Technological University
Stackoverflow
113reputation
23kreached
2answers
4questions
Github Skills (27)
javascript10
css10
typescript10
front-end-development10
typescript-types10
yarnpkg10
typescripts10
devtools9
ide9
development-environment9
react9
html9
documentation8
ui-design8
user-authentication7
Programming languages (15)
Github contributions (5)
coder/code-server
Jul 2021 - Nov 2021
VS Code in the browser
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:1 release, 79 reviews, 20 commits in 3 months
Contributions summary:Teffen contributed significantly to the code-server project by adding and refactoring features related to the integration of VS Code. They implemented VS Code vendor package using yarn, and modified build scripts and configurations. Furthermore, the user introduced a "linkup" command and addressed build and dependency issues. These changes indicate a focus on enhancing the core functionality and maintainability of code-server.
browservscodejavascriptvscode-extensionbrowser-ide
goauthentik/authentik
Jan 2025 - Apr 2025
The authentication glue you need.
Role in this project:Front-end Developer
Front-end DeveloperContributions:42 reviews, 38 PRs, 41 pushes in 2 months
Contributions summary:Teffen primarily contributed to the website's documentation and user interface. Their work involved modifying the documentation structure and content, specifically related to Google Workspaces SAML and Apple Business Manager integration. They also addressed issues with the user interface, including improvements to the accordion headers for better user experience and enhancements to form input validation and visibility.
proxysaml-idpreverse-proxyoauth2-serverglue
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