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I'm a Haskell programmer who lives in Cambridge with my wife Emily and son Henry. I have a PhD in Computer Science from York University, working on making functional programs shorter, faster and safer. Since then I've worked at Credit Suisse, Standard Chartered, Barclays Bank and Digital Asset, and I currently work at Facebook — but all content and opinions are my own. I'm a strong believer in the functional programming approach, finding the combination of conciseness, static-typing and testability to offer significant advantages. I've got a blog mostly about Haskell, and I'm also on Twitter, LinkedIn and GitHub. To get in touch email me at

Open Source Projects

I develop a number of open source Haskell projects, all of which can be found at my Github page or on Hackage. I welcome both contributions via pull requests and bug reports via the GitHub issue trackers. Some of my more popular projects include:

  • Shake - a library for writing build systems, an alternative to make.
  • Hoogle - a Haskell API search engine, searching the standard Haskell libraries by function name and type signature.
  • HLint - a tool that suggests stylistic improvements to Haskell code.

A list of all my talks and papers are available on


  1. hlint Public

    Haskell source code suggestions

    Haskell 1.3k 173

  2. ghcid Public

    Very low feature GHCi based IDE

    Haskell 1k 101

  3. shake Public

    Shake build system

    Haskell 701 113

  4. hoogle Public

    Haskell API search engine

    Haskell 615 119

836 contributions in the last year

Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Mon Wed Fri

Contribution activity

July 2022

Created 1 commit in 1 repository

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