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Services Overview
Holistic software investment consulting
Software Delivery
Accelerate quality software development
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Launch modern product orgs
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Renovate legacy software systems
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DevOps
Scale infrastructure smoothly
Upgrade Rails
Update Rails versions seamlessly
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Build tech & product teams
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Accelerate Quality Software
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Maximize Software Investments
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Future-Proof Innovative Software
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About
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About
What's a test double?
Approach
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The origin of our mission
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Culture & Careers
Double Agents decoded
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Great code for great causes
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Equity, diversity & inclusion
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Bold opinions and insights for tech leaders
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Essential coding tutorials and tools
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Insights for great software & great teams

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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Developers
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Pydantically perfect: A beginner’s guide to Pydantic for Python type safety

Introducing Pydantic, a powerful library for type-safe data models in Python. Let’s go through the creation of a simple Pydantic model and the benefits provided.

Gabriel Côté-Carrier
Gabriel Côté-Carrier
Software tooling & tips
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Developers
C# and .NET tools and libraries for the modern developer
Patrick Coakley
Patrick Coakley
Software tooling & tips
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Leadership
Leadership
Leadership
Turning observability into a team strength without a big overhaul
Gabriel Côté-Carrier
Gabriel Côté-Carrier
Legacy modernization
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Developers
Developers
Developers
Why I actually enjoy PR reviews (and you should, too)
Robert Komaromi
Robert Komaromi
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Double Takes

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Double Takes

Friday afternoon hot take (after a couple months of engineering exclusively with coding agents):

Context/prompting is a crutch that will only get you so far.

The AI agent does not have a true understanding of both:

  • The business logic that the code it is generating represents
  • The wider system(s) that it is being written to run within

IOW the why of the code.

The result is that no matter how hard you try it is not able to consistently apply rules and/or conventions (eg: logically organizing/co-locating code).

Tom Nightingale

TIL you can use redirect.github.com in links to avoid a back reference being created on github from commits, comments, PRs, etc.

Jason Karns

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

Wow, 1 month for a rewrite seems a little aggressive.

Dustin Tinney
Developers
Developers
Developers
Makefiles made easy: Key tips for beginners
A simple guide to Makefiles to make your development smoother and more approachable. Perfect for beginners!
Dave Mosher
Dave Mosher
Software tooling & tips
automation
Developers
Developers
Developers
Accessibility is usability
Discover how following accessibility guidelines can remove barriers and improve the experience for all users, not just those with disabilities.
Sam Jones
Sam Jones
Equity, Diversity & Inclusion
a11y
testing
accessibility
Developers
Developers
Developers
testdouble.js 2.0: your new go-to for JavaScript testing
Check out the latest release of testdouble.js 2.0! Packed with new features and improvements, it's designed to make JavaScript unit testing smoother and more effective.
Justin Searls
Justin Searls
Testing
testing
java
javascript
teams
open-source
Developers
Developers
Developers
Large and in charge: Using Git LFS for large projects
Explore why Git Large File Storage (Git LFS) is critical for handling large files in your projects and how it enhances your version control strategy.
Michael Schoonmaker
Michael Schoonmaker
DevOps & security
architecture
docker
rails
infrastructure
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Developers
Developers
Developers
Tips for clearer code slides in presentations
Ever struggled with code slides in presentations? Learn tips to make them more engaging and easy to follow, boosting your next presentation's impact!
Josh Greenwood
Josh Greenwood
Communication & teams
elm
testing
communication
The Compiler as an integration test
Developers
Developers
Developers
Life after nil: Learning about type systems
Learn the benefits a type system adds to your coding with Haskell. Forget about nil, declaratively model your domain, and allow the compiler to drive.
Sam Jones
Sam Jones
Software tooling & tips
ruby
testing
conference-talk
Pie chart
Developers
Developers
Developers
Building a well-factored pie graph with React and D3
Discover how to effectively integrate React and D3 to create a seamless, interactive pie graph. Learn the strategy behind separating state management and graph presentation for optimal results.
Sam Jones
Sam Jones
Software tooling & tips
react
javascript
testing
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Developers
Developers
Developers
How to scratch an itch: A creativity talk
Justin Searls has a strange theory: what if creativity is like a chronic illness fueled by toxic emotions and character flaws?
Justin Searls
Justin Searls
Communication & teams
consulting
testing
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