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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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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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Conveyor belt system built from LEGO

Legacy systems and delivery pressure: Symptoms healthcare tech teams keep treating

Healthcare product and engineering teams stay busy fixing bugs, modernizing systems, and shipping features faster. But when the root cause is process, culture, or misalignment—not code—the same problems keep coming back.

Cathy Colliver

Legacy modernization

A watercolor gecko resting on a stack of documentation pages, evoking a small, alert companion native to the terrain.

How to build a documentation companion with Claude skills: six lessons from the field

Jeremy Fairbank

Jeremy Fairbank

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

Healthcare software teams keep fixing symptoms: Real problems run deeper

Cathy Colliver

Legacy modernization

Ensō (Zen circle) with digital flourishes

🐍 Functionally Zen

Kyle Adams

Future-proof innovative software

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

The dangers of abstracting away vendors in code

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

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

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

Communication & teams

ai-ml

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

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

Software tooling & tips

productivity

eliminate-waste

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

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

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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

Communication & teams

kpi

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

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