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How-to guides, tooling tips and real-world advice for developers and product managers tired of broken software. Let’s fix this mess together.

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A tree made of LEGO with deep roots and a magnifying lens

Healthcare software teams keep fixing symptoms: Real problems run deeper

Healthcare engineering and product teams spend more time managing technology than improving care. Original survey data, industry research, and expert interviews reveal the macro trends and investment patterns holding healthcare software back in 2026.

Cathy Colliver

Legacy modernization

Ensō (Zen circle) with digital flourishes

🐍 Functionally Zen

Kyle Adams

Future-proof innovative software

Crab working on a tiny laptop in a sandbox on top of a desk with monitors in the background

Get in the box: Illustrated permissions guide to make Claude chill

Joé Dupuis

Nesting boxes unfold from decorative to scaffolding to hardware

We're about to unwind fifty years of "Progress"

Doc Norton

Double Takes

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Double Takes

TDDing with Claude is like having a pair that removes all the failing assertions every time you go to the bathroom.

Steve Jackson

State machines are the answer for those seeking determinism in the era of AI agents.

Dave Mosher

A Slack conversation left Doc reflecting on what bug bashes say about the systems we work in.

Doc Norton

Test-driven development is to programming what double-entry bookkeeping is to accounting.

Neal Lindsay

The fundamental character flaw of the software creator is not the misguided belief that they can solve any problem with software. Instead, it is the belief they can understand how their own software works before they create it.

Steve Jackson

We may need a SaaS appendix for Zawinski's law:

Any SaaS platform attempts to expand until it is a social network.

Matt Jones

Abstract digital depiction of network connections

How Clojure enhances Node.js with isomorphic scripting

Join us as we delve into the world of isomorphic ClojureScript, showing how Clojure and Node.js can create powerful, efficient applications.

Andy Vida

Software tooling & tips

java

javascript

react

testing

architecture

A container you get immediately for a value you get eventually

Common patterns using JavaScript promises

Explore common patterns using JavaScript promises to improve asynchronous code and level up your development skills.

Neal Lindsay

Software tooling & tips

api

javascript

Kid looks through a magnifying glass at toy bugs

How to debug dependencies with git bisect

Debugging dependencies? Here's how git bisect can save your day!

Justin Searls

Accelerate quality software

testing

Retro sign reading It's Easy

How to stop hating your tests

Justin Searls' RubyConf 2015 talk that analyzes common reasons teams become disillusioned with tests, and offers targeted advice to help prevent these problems from ever materializing by tweaking tools, workflow, and perspective.

Justin Searls

teams

testing

conference-talk

developer-experience

White puffy clouds against a neon green background

Deploy Ember app on AWS with SSL and CloudFront

Looking to secure your Ember app with SSL? Check out this step-by-step guide on deploying your Ember app on AWS using S3 and CloudFront. It's easier than you think!

Kevin Pfefferle

Kevin Pfefferle

DevOps & security

ember

aws

cloud

testing

Avoid these pitfalls of buying custom software development

Navigating custom software development can be tricky. Discover how to avoid common pitfalls and build a successful partnership with the right agency.

Todd Kaufman

Maximize software investment

budgeting

software-purchase

My favorite way to TDD

My favorite way to TDD

Test Double co-founder Justin Searls shares his discovery testing approach to using test doubles in this four part video series, including explaining when test doubles should be used and when they shouldn't.

Justin Searls

testing

productivity

Finding joy at work

Finding joy at work as a founder

Starting your own business is the most risky and stress ridden path to joy you can imagine. Test Double CEO & Co-founder shares challenges, mistakes, and successes from his pursuit of joy at work.

Todd Kaufman

Communication & teams

teams

communication

You're N.E.A.T.!

Technology is a means to an end: answers to very human questions. We want to connect with other folks who share that belief.

Ways to connect

Test Double Executive Leadership Team

Learn about our team

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