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  1. About Clojure/core

    Clojure/core is a specialized technical practice brought to you by Relevance, Inc. We have a passion for bringing Clojure to life through working on and with the language, supporting the community, and helping developers use Clojure effectively. When you work with Clojure/core, you are not only tapping into the expertise of this expert team, but you are also helping to sustain the Clojure language itself. Our team includes direct contributors to Clojure and Clojure-contrib, and is advised by Rich Hickey (the creator of Clojure) and Stuart Halloway (the author of Programming Clojure).

    Clojure/core Team

    Rich Hickey

    Consulting Advisor

    Rich is the inventor of Clojure. He serves as an advisor to the Clojure/core team, bringing his technical expertise in matters of Clojure and programming in general to ensure the highest quality development experience for our customers.

    Stuart Halloway

    Consulting Advisor

    Stuart is the author of Programming Clojure. He advises the Clojure/core team on matters of training and practical development with Clojure.

    Brenton Ashworth

    Brenton is a contributor to ClojureScript and the main instigator behind ClojureScript One, a project which is intended to help spread a passion for writing applications in ClojureScript. He has used Clojure in various ways to create several successful commercial web projects.

    Christopher Redinger

    Chris has been involved in multiple commercial Clojure projects and is responsible for helping the community with such endeavors as user groups and The Conj

    Stuart Sierra

    Stuart Sierra is the author of several popular open-source Clojure libraries, including clojure.test, various I/O utilities, and an HTTP client. He is the co-author, with Luke VanderHart, of the book Practical Clojure, released by Apress (2010). Stuart received his M.S. in Computer Science from Columbia University.

    Luke VanderHart

    Luke believes that simple code leads to robust applications. Especially if it's Clojure. He is the co-author, with Stuart Sierra, of the book Practical Clojure, released by Apress (2010).

Why Clojure/core

We combine the deep technical understanding of the creator of Clojure with the best practices of a premier agile development company to provide expert development. We are the core development team for Clojure itself, and we invest back into Clojure every week in order to sustain the platform and the community.

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Why Clojure

Complexity threatens to overwhelm the modern programmer. Rather than getting things done, it is all too easy to focus on tangential problems caused by the technology itself. Clojure was created to combat this state of affairs through: Simplicity, Empowerment and Focus.

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Simplicity, Power, Joy

Clojure is built from the ground up to be simple. Code is data. Functions are easy to write and test. Data is immutable, and state is explicit. Protocols and types expose the usable parts of OO, minus the pain. You don't have to settle for familiar complexity.


Don't throw away your existing code! Clojure is built on top of the JVM, the most widely used deployment platform today. Clojure provides fast, wrapper-free access to Java code, plus powerful new ways to use that code better.


Focus comes when you can work at the right level of abstraction. Clojure's design lets you start work immediately on your problems, not tool problems. Clojure's Lisp heritage provides the features you need to keep ancillary problems out of your way throughout a project's lifecycle.

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