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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
Software Delivery, DevOps, & Product Delivery
Maximize Software Investments
Product Performance, Product Scaling, & Technical Assessments
Future-Proof Innovative Software
Legacy Modernization, Product Transformation, Upgrade Rails, Technical Recruitment
About
About
About
What's a test double?
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The origin of our mission
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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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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
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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

Whenever this kind of thing happens, the biggest mindset shift is not going from single tool to platform (though that's useful to translate to business use cases), it's what happens when you realize there's an entire ecosystem at play here. 🤯

Cathy Colliver

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
Pair programming: the unexpected benefits and challenges
Discover the pros and cons of pair programming, and learn how it can improve code quality, team collaboration, and developer growth.
Eve Ragins
Eve Ragins
Communication & teams
teams
Developers
Developers
Developers
Remembering Chris Seaton's legacy in the Ruby community
Join us in celebrating the life and legacy of Chris Seaton, a brilliant mind in the Ruby community. His mentorship and generosity left an indelible mark on us all.
Justin Searls
Justin Searls
ruby
Developers
Developers
Developers
Smoother, responsive Rails forms with Tailwind
Struggling with Rails form styling? Learn how to leverage Tailwind CSS to streamline your form development and keep your code DRY.
Daniel Huss
Daniel Huss
Software tooling & tips
rails
Complicated Rube Goldberg type device
Developers
Developers
Developers
Building a linkblog with Hugo, Tailwind and Netlify
Overview of one way to organize a personal blog to enable very low-friction publishing, using Hugo, Tailwind, and Netlify (plus NetlifyCMS).
Justin Searls
Justin Searls
Software tooling & tips
infrastructure
agile
open-source
An arrow runs through a tangled knot
Developers
Developers
Developers
Building robust apps with Phoenix LiveView and no JavaScript
Learn how to use Phoenix LiveView to create robust applications without writing any JavaScript. Discover tips and tricks for efficient development.
Jeremy Neal
Jeremy Neal
Software tooling & tips
elixir
javascript
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Developers
Ignore RuboCop changes in Git Blame
Hide refactoring commits in git-blame by using .git-blame-ignore-revs
Caleb Hearth
Caleb Hearth
Software tooling & tips
automation
ruby
testing
Developers
Developers
Developers
S.O.S.(F).: Save Our Submittable (Forms)
Dive into the real-world challenges of form development in React. It's not just about coding—it's about creating experiences!
Daniel Huss
Daniel Huss
Software tooling & tips
react
javascript
node.js
ux-ui
Developers
Developers
Developers
A guide to effective software consulting
Dive into the world of software consulting with firsthand insights on what makes a successful consultant. Learn from the pros at Test Double.
Nichol Alexander
Nichol Alexander
Accelerate quality software
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