FUN OCaml

WARSAW

September 15 & 16, 2025

PROGRAM

Fun OCaml 2025 is a 2 days open source hacking event dedicated to OCaml enthusiasts and professionals around the globe!

Let's get together for an exhilarating event packed with creativity, innovation, and learning:

Talks are live-streamed and will appear on watch.ocaml.org and the FUN OCaml YouTube channel after the event.

The talks from the event will be live streamed free of a charge. We recommend subscribing to FUN OCaml's YouTube channel!

September 15 - 9:00-24:00

September 16 - 9:00-22:00

Build Language Models with Raven
Thibaut Mattio
Workshop
Frameworks: No, Libraries: Yes. Developing a product in OCaml from Scratch
Malcolm Matalka
Talk
0xCaml From a System Engineer's Point of View
Dmitriy Kovalenko
Talk
Train a Reinforcement Learning Agent for the Box-Pushing Game Sokoban in OCANNL or Raven
Lukasz Stafiniak
Workshop
Generating Static Websites the Functional Programming Way
Xavier Van de Woestyne
Talk
Slipshow: A Full-Featured Presentation Tool in OCaml
Paul-Elliot Anglès d'Auriac
Talk
Hacking the OCaml Compiler to Add Type Reflection
Nicolás Ojeda Bär
Workshop
State of the OCaml Ecosystem 2025
Leandro Ostera
Talk
Cross-Platform OCaml Projects
Manas Yayanth
Talk
From OCaml 4 to 5 and from Parmap to Effects: A legacy code transition story
Nathan Taylor, Nat Mote
Talk
Vif & Hurl, a Web Framework for OCaml 5
Romain Calascibetta
Workshop
OCaml Observability with OpenTelmetry
Austin Theriault
Workshop
Performance Pitfalls: Tales From a Python/OCaml Codebase
Emma Jin
Talk
I Can See The Pixels: Designing Cross-Stitch Patterns in OCaml
Mindy Preston (yomimono)
Talk
OCaml at LexiFi
Nicolás Ojeda Bär
Talk
mlx, Melange, React and Server Components
David Sancho Moreno
Workshop
Analyzing Programs with SMT Solvers
Tikhon Jelvis
Talk