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San Francisco Bay Area & Silicon Valley Haskell Hackathon

Come join a group of Haskell hackers to enjoy a weekend of learning, sharing, and hacking on a variety of projects. Bring your laptop! All skill levels are welcome.

When: Friday, April 27th – Sunday, April 29th, 2018
Where: Formation (formerly Takt) office: 35 Stillman St, San Francisco
Cost: Free
Registration: BayHac 2018 Registration form
News and Discussion: BayHac Google Group

This year's BayHac organizers are:

  • Anthony Finch
  • Chris Smith
  • Dan Burton
  • Erica Waichman
  • Tikhon Jelvis


BayHac is all about the hacking! Add your project below to declare your intent to hack, and inform others on how they can join in.

  • /CodeWorld: Educational computer programming environment using Haskell
  • /hnix: A Haskell re-implementation of the Nix expression language
  • /haddock: Your favourite Haskell documentation generation tool
  • karya: A 2D music language, score editor, or sequencer in Haskell. There is also a synthesis backend, and a konnakol-based haskell DSL for writing rhythmic structures. Talk to me if interested, I should be around Friday and Sunday -- Evan Laforge (
  • gelatin: A real-time 2D graphics API with multiple backends including OpenGL and WebGL.
  • Lambency -- A game/rendering framework built using the arrowized FRP library netwire. I'll be trying to add a networking element within the FRP framework. E-mail me if you're interested in contributing!
  • Kitten: A statically typed concatenative programming language. I’ll be working on refactoring the compilation pipeline and integrating a new typechecker, and could use input from people with experience working on developer tools. — Jon Purdy


This year will be lighter on the talks, to allow more free time for hacking.

Friday, April 27

Drinks and snacks. (No talks on Friday)

  • 6:00pm BayHac opens for the day
  • 9:00pm BayHac closes for the day

Saturday, April 28

  • 9:30am BayHac opens for the day
  • 10:00am Talks
    • Judah Jacobson: Pier: yet another Haskell build system
    • Robin Bate Boerop: Using Haskell inside Apache Spark
    • Dmitriy Tadyshev: Simple Distributed Web Crawler with Cloud Haskell
    • Alexander Thiemann: SuperRecord: Anonymous Records in Haskell
    • Greg Pfiel: Qualified (not Quantified) Constraints: a fresh perspective on `newtype`
    • Gabriel Gonzalez: Dhall - Programmable configuration language
  • 12:00pm Lunch
  • 5:00pm BayHac closes for the day

Sunday, April 29

  • 9:30am BayHac opens for the day
  • 10:00am Talks
    • James Bowen: Haskell, Tensor Flow, and Dependent Types
    • Maximilian Tagher: Validation Across the Stack (Postgres, Haskell, and the frontend)
    • Travis Athougies: Beam for composable, type-safe database queries
    • Nick Pollard: Free objects (eg. Free applicatives, free monoids)
    • André van Meulebrouck: Intro to containers: functor, applicative, monad
    • Chris Smith: CodeWorld: Teaching Haskell to kids
  • 12:00pm Lunch
  • 5:00pm BayHac closes for the day

Is this a scam to steal my intellectual property?

BayHac is not that kind of hackathon; there is no competitive coding element here. It is only a "hackathon" in the sense that a group of Haskellers will gather to hack on various projects.

See our /Intellectual_Property_Policy


BayHac 2018 is very grateful to our pledged sponsors:

Codeworld.png            Formation Logo.png

Target logo.svg Functional-Works-Logo.png


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