Felix Zeller

programming for dopamine.

• 2023-2024: organizing knowledge, Markdown-Oxide
  • Markdown-oxide was the first a text-editor agnostic knowledge management framework. It brought Obsidian-style wikilinking to neovim, helix, zed, vscode, etc.
  • Now the second-most popular OSS markdown language server and the canonical Zed markdown extension, it's used by hundreds of thousands of developers, researchers, students, and authors across the world.
• August 2024: organizing more knowledge, Exa Web Search
  • January 2025: Created Exa Hybrid Search, billion scale hybrid search from scratch in rust
  • April 2025: Led R&D for 20x index expansion that beat google for our largest clients and established Exa as a general search engine.
  • June 2025: Co-Created Exa Fast, the fastest and highest quality low-latency search API in the world (<350ms).
  • September 2025: Created and led R&D for exa-code; now used by millions of developers.
  • now: post training research -- creating a search engine unbounded by hueristics