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Advent of Code has long been a favorite Decemberritual at Jane Street, with many participating in the month-long puzzle challenge thatencourages thoughtful e...

My gas supplier has tried and failed to install a smart gas meter, so I’ll give it a go myself.

Complete guide to deploying OCaml containers to Azure App Service with SSH access, database migrations, and PostgreSQL extension management. From Docker multi-stage builds to production user creation.

A Vision for OCaml in the AI Era Nicolás Ojeda Bär ABSTRACT AI is reshaping software development, yet OCaml's adoption in AI workflows remains limited. This talk explores how the OCaml community can proactively embrace AI to make OCaml a productive language in the AI era—both for writing AI applications and for AI-assisted development. We examine two critical questions: First, how can OCaml become a viable alternative to Python for machine learning? By addressing ecosystem breadth and developer experience, we can solve real problems—from unifying research and production codebases to enabling scalable deployment with OCaml's performance guarantees. Second, how can we make OCaml more productive for AI-assisted development? Strong type systems and integrated tooling give OCaml a natural advantage for coding agents, but we need specialized, open-source tools built for the OCaml ecosystem. This talk introduces Raven, a modern scientific computing ecosystem for OCaml that mirrors Python's ML stack, and Spice, an upcoming local-first, OCaml-native coding agent. Beyond tooling, we'll discuss how the community can anticipate changes in onboarding, documentation, and workflows to ensure OCaml thrives in an AI-driven future—while maintaining equal opportunity and access for all developers. Session page: https://fun-ocaml.com/2025/a-vision-for-ocaml-in-the-ai-era/ Connect with FUN OCaml: Twitter: https://x.com/FunOCaml Bluesky: https://bsky.app/profile/fun-ocaml.com #ocaml --- Big Thanks(TM) go to our generous sponsors who made FUN OCaml possible! * Octra Labs - https://octra.org/ - Platinum Sponsor * Ahrefs - https://ahrefs.com/ - Platinum Sponsor * Dialo - https://dialo.ai/ - Gold Sponsor * LexiFi - https://www.lexifi.com - Bronze Sponsor * Jane Street - https://www.janestreet.com/ - Bronze Sponsor * LightSource - Volunteer / Organizer Commitment * Tarides - Volunteer / Organizer Commitment

OCaml at LexiFi Nicolás Ojeda Bär ABSTRACT LexiFi is likely to have been the first real industrial user of OCaml, back when it was funded in 2000. In this talk, I will present some of the things we have learned along the way. Some of the points I will address: our technology stack (development environment, deployment and distribution, cloud infrastructure, etc), tooling, strong and weak points of OCaml, people aspects (hiring and training), etc. If there is time, I will also present one of our key technical innovations: extending the OCaml compiler with type reflection (this topic will be explored further in the dedicated Workshop). Session page: https://fun-ocaml.com/2025/ocaml-at-lexifi/ Connect with FUN OCaml: Twitter: https://x.com/FunOCaml Bluesky: https://bsky.app/profile/fun-ocaml.com #ocaml --- Big Thanks(TM) go to our generous sponsors who made FUN OCaml possible! * Octra Labs - https://octra.org/ - Platinum Sponsor * Ahrefs - https://ahrefs.com/ - Platinum Sponsor * Dialo - https://dialo.ai/ - Gold Sponsor * LexiFi - https://www.lexifi.com - Bronze Sponsor * Jane Street - https://www.janestreet.com/ - Bronze Sponsor * LightSource - Volunteer / Organizer Commitment * Tarides - Volunteer / Organizer Commitment

The weather outside is frightful, but the Raspberry Pi is so delightful; I have been cheering myself by connecting up all the various bits of hardware scattered on my desk. I often buy these components but never quite get around to using them.