Felix Rieseberg
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Hi, I'm Felix.

I work on Claude at Anthropic. Electron co-maintainer. Maintainer of too many little open source projects.

More about me

A desk at night by a rainy window: a small TV showing the name Felix Rieseberg, a VCR, a stack of labelled video tapes, a desk lamp and a plant.

Static version

Personal websites and portfolios are some of the last places where the Internet is still creative and fun, so I worked very hard on an interactive experience. Your computer and browser identified themselves as a device where the experience might be bad, so you've been routed to this static version.

Click here to try the interactive version anyway.

Work

Anthropic2025–now

I work on whatever allows me to make people productive with AI. In my time at the company so far, I've led engineering for Claude.ai, Cowork, and Code Desktop. Always looking for the next big thing! claude.com/download

Notion2023–2025

Notion's desktop apps for Mac and Windows, plus the web plumbing underneath them. notion.com/desktop

Stripe2021–2023

Two years on Stripe's core payments APIs, the part developers call when they want to get paid. stripe.com

Slack2016–2021

Nearly five years on Slack's desktop app for macOS, Windows and Linux, first writing code, later managing the team. slack.com/downloads

Microsoft2011–2016

Five years at Microsoft, evangelizing Windows Phone in Munich and San Francisco, then open source, mostly making npm install work on Windows. github.com/felixrieseberg/windows-build-tools

Projects

Electron2016–now

I've helped maintain Electron since 2016, which explains why most things on this shelf are Electron apps. electronjs.org

Electron Fiddle2018–now

A quick way to try Electron: small experiments, any version, no setup. electronjs.org/fiddle

Clippy2025–now

Clippy from Office 97, back on your desktop and running a language model on your own computer. felixrieseberg.github.io/clippy

Language Model Builder2026–now

A free Mac app that explains how language models work, then lets you train a small one yourself. languagemodelbuilder.com

windows952018–now

Windows 95 in an Electron app, yes, the full thing, with the hard emulation work done by v86. github.com/felixrieseberg/windows95

macintosh.js2020

Mac OS 8 in an Electron app pretending to be a 1991 Macintosh Quadra, with the emulation done by Basilisk II. github.com/felixrieseberg/macintosh.js

Posts

  1. How to be more ambitious: A tutorial for humans with models13 Oct 2026
  2. Made by mechanical means27 Sep 2026
  3. The Fanciest eCards28 Feb 2025
  4. Things people get wrong about Electron21 Jan 2025
  5. Using WebGL Shadertoy Shaders in Three.js21 Sep 2024
  6. Adventures in Measuring JavaScript8 Nov 2023
  7. Debugging native Node.js addons with Electron on macOS18 Aug 2023
  8. Avoid Git Merge Conflicts During a Big Rebase1 Sep 2021
  9. On Running an Electron Contributor Training3 Feb 2020
  10. Code-signing Electron Apps in CI1 Dec 2019
  11. Debugging Native Crashes in Electron Apps on Windows29 May 2019
  12. Dependencies and Git branches17 Apr 2019
  13. Progressive Web Apps & Electron8 Apr 2019
  14. Introducing Electron Fiddle10 Aug 2018
  15. Defeating Electron12 Jul 2018
  16. A Guide to Electron18 Dec 2017
  17. Ember-Electron 2: Building Desktop Apps with Ember and Electron10 Apr 2017
  18. Using Native Windows Features from Electron9 Jan 2017
  19. Running your own Parse with Azure and Docker29 Jan 2016
  20. Using Travis to Deploy Apps to Azure2 Sep 2015
  21. Deploying Flynn Clusters on Azure18 Aug 2015
  22. Deploy Jekyll Pages using Git and Travis CI14 Aug 2015
  23. A Peer Review Bot for GitHub23 Jul 2015
  24. npm@3 is here and it's a huge deal for Windows26 Jun 2015
  25. Wicked Cool Excel Functions with Blockspring17 Jun 2015
  26. Building a Android Twitter Clone with Azure Mobile Services12 Apr 2015
  27. Installing Ghost on Azure8 Apr 2015
  28. Improved Ember Cli Performance with Windows11 Mar 2015
  29. Open Source: A Small Guide for Newcomers9 Mar 2015
  30. Host your own Heroku-style platform with Deis and Azure27 Feb 2015
  31. Deploying Ember Cli to Azure Websites21 Feb 2015
  32. Deploying SailsJS Apps in Seconds17 Feb 2015
  33. Node 0.12 (Stable) and Azure Websites6 Feb 2015
  34. What is a Microsoft Open Source Engineer, anyway?5 Feb 2015
  35. Azure Websites and io.js19 Jan 2015
  36. ECMAScript 6: A Quick Intro to the Future of JavaScript15 Jan 2015
  37. Building Standalone Node.js Apps with Node Webkit19 Nov 2014
  38. The Ghost Updater for Azure Websites21 Oct 2014
  39. The Small Windows Dev Environment17 Jul 2014
  40. Node Mayhem: An Open-Source Node.js HTML5 Multiplayer Shooter11 Nov 2013
  41. Mapping SkyDrive as a folder on Windows RT23 Dec 2012
  42. Windows 8: Displaying a clock on Live Tiles22 Dec 2012

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