AnthropicMember of Technical Staff
2025 — Present
Has led engineering for Claude.ai, Cowork and Claude Code Desktop.
Felix Rieseberg builds Claude at Anthropic and co-maintains Electron. His work spans desktop apps, developer tools and open-source projects, including Electron Fiddle and Language Model Builder.
Felix Rieseberg builds Claude at Anthropic and co-maintains Electron. His work spans desktop apps, developer tools and open-source projects, including Electron Fiddle and Language Model Builder.
Career
NotionDesktop Engineering
2023 — 2025
Worked on Notion's Mac and Windows desktop apps and underlying web infrastructure.
StripePayments Engineering
2021 — 2023
Worked on Stripe's core payments APIs.
SlackDesktop Engineering
2016 — 2021
Built Slack's desktop app and later managed the team.
MicrosoftOpen Source Engineering and Developer Evangelism
2011 — 2016
Worked on Windows Phone developer evangelism and later open-source tooling.
Cosigns Received
Featured Media
felixrieseberg.com
How to be more ambitious with AI
A practical essay on pursuing larger outcomes, deeper analysis and work across disciplines with models.
languagemodelbuilder.com
Language Model Builder
His free Mac app combines an interactive introduction to language models with tools to train and inspect a model locally.
electronjs.org
Electron Fiddle
His tool for exploring Electron APIs and sharing runnable experiments.