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Services Overview
Holistic software investment consulting
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Accelerate quality software development
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Launch modern product orgs
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Renovate legacy software systems
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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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About
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What's a test double?
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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

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
The dangers of abstracting away vendors in code
Developers
Developers
Developers
The dangers of abstracting away vendors in code
When integrating third-party vendors, abstraction is key—but too much can make your code unnecessarily complex and inefficient. Here's how to strike the right balance.
River Lynn Bailey
River Lynn Bailey
Software tooling & tips
api
How a product transformation drove 3x sales growth
Leadership
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Leadership
The road to 3x sales: a case study in scaling with strategy
When scaling exposed gaps in strategy, Test Double transformed a car platform’s chaotic growth into a clear path to 3x sales. Here’s how we did it.
Test Double Editorial Board
Test Double Editorial Board
Product management
kpi
product-innovation
7 takeaways from CIO Tomorrow 2024 for leading transformation
Leadership
Leadership
Leadership
7 takeaways from CIO Tomorrow 2024 for leading transformation
Ohio’s Silicon Heartland is leading the charge in innovation. Here are the 7 most impactful insights from CIO Tomorrow 2024 that will inspire your next transformation.
Cathy Colliver
Cathy Colliver
Communication & teams
ai-ml
Leadership
Leadership
Leadership
Why domain expertise is overrated—and what your software really needs
Industry experience isn’t the solution—it’s the problem. When everyone plays by the same rules, ideas go stale. We cut AWS costs by 25% and drove 3x sales growth—with fresh skills, not insider knowledge.
Test Double Editorial Board
Test Double Editorial Board
Maximize software investment
product-innovation
Developers
Developers
Developers
GitHub shortcut commands that’ll speed up your code reviews
If you’re still relying on clicks to navigate GitHub, you’re doing it the hard way. These shortcuts will speed up your PR reviews.
Kate McGinty
Kate McGinty
Software tooling & tips
productivity
eliminate-waste
Leadership
Leadership
Leadership
Stop blaming code. Start fixing team health.
In her Rails World keynote, Eileen Uchitelle dropped a truth bomb: Fixing your architecture won't fix your human or culture problems — but fixing human and cultural problems will create better software. We couldn't agree more.
Test Double Editorial Board
Test Double Editorial Board
Communication & teams
teams
communication
Rails 8.0 beta just dropped
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Developers
Rails 8.0 beta just dropped—here’s what’s new and why it matters
Rails 8.0.0.beta1 brings big updates like a new authentication system and major backend improvements.
Test Double Editorial Board
Test Double Editorial Board
Rails upgrades
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Developers
How to ask 'Why are we building this?' without sounding critical
Asking "Why are we building this?" can be tricky, but it’s key to aligning efforts with business goals. Here are practical tips to raise these questions without stepping on toes.
Kate McGinty
Kate McGinty
Communication & teams
kpi
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