The Third Bit

Start where you are, use what you have, help who you can.

In Brief

Co-founder of Software Carpentry, The Architecture of Open Source Applications, and It Will Never Work in Theory
ACM SIGSOFT Influential Educator of the Year
Co-winner, Jolt Award, Best General Book
Member, Python Software Foundation
Ph.D. in Computer Science
Author or editor of over a dozen books on programming and two for children


Current and Recent Projects

Research Software Engineering in Python

A textbook for a semester-long course on building research software and running research software projects.

Teaching Tech Together

A book about teaching programming for people with technical backgrounds but no formal training as educators.

It Will Never Work in Theory

Brief reviews of empirical research results in software engineering and computing education of particular relevance to practitioners.

Software Design by Example in JavaScript

Teaches software design by re-implementing common software engineering tools in Node.js; formerly hosted at

Building Software Together

A student's guide to team software projects that covers everything from using Git to running meetings; currently in beta.

JavaScript for Data Science

An introduction to JavaScript for both client-side and server-side programming for data scientists who have never used it before.

The Carpentries

A non-profit organization dedicated to teaching basic software and data skills to researchers world-wide. I co-founded its predecessor, Software Carpentry, and was its first Executive Director.

The Architecture of Open Source Applications

Essays describing the architectures of fifty open source projects of various sizes, many written by those projects' creators.

In the wake of posts about Shopify's support for white nationalists and DataCamp's attempts to cover up sexual harassment
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