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Services Overview
Holistic software investment consulting
Software Delivery
Accelerate quality software development
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Launch modern product orgs
Legacy Modernization
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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About
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About
What's a test double?
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Developers
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C# and .NET tools and libraries for the modern developer

C# has a reputation for being used in legacy projects and is not often talked about related to startups or other new business ventures. This article aims to break a few of the myths about .NET and C# and discuss how it has evolved to be a great fit for almost any kind of software.

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
Software tooling & tips
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Developers
Developers
Developers
Build with HTMX: Simplify development with a return to fundamentals
Dave Mosher
Dave Mosher
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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
What it’s like to work as a consultant at Test Double
Considering transitioning from senior software engineer or product manager to consulting? Test Double has created space for software and product consultants to work how they work best.
Anya Iverova
Anya Iverova
Recruiting & careers
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Developers
Developers
Developers
How modern frontend teams approach automated testing
Modern frontend testing doesn't need to be overwhelming—focus on two types of tests that deliver real value: co-located unit tests using tools like Vitest and Testing Library, plus targeted E2E tests for critical user flows. This practical approach helps product teams move fast while maintaining confidence, without getting bogged down in testing theory or arbitrary coverage metrics.
Robert Komaromi
Robert Komaromi
Testing
automation
ci-cd
testing
quality
Feature backlog that's out of control
Leadership
Leadership
Leadership
Why hiring more developers costs more than you think
Scaling challenges are rarely caused by a lack of developers or how many lines of code are written each sprint. Let’s explore challenges caused by prematurely expanding your team—and why you’re less likely to scale your productivity and more likely to scale your existing bottlenecks.
Shawn Rinehart
Shawn Rinehart
Maximize software investment
communication
teams
tech-debt
dev-experience
productivity
Paint splashes turn into a beautiful piece of art
Leadership
Leadership
Leadership
Building software teams that manage mistakes rather than rejecting them
The software industry shares a pervasive assumption that expert developers don’t make mistakes. Developers are only human. They will make mistakes. Ignoring that means any mistake can lead to a high intensity event. There’s a better way. Invest in systems to manage inevitable mistakes.
Gabriel Côté-Carrier
Gabriel Côté-Carrier
Communication & teams
agile
communication
productivity
professional-growth
teams
Rubber duck next to a Rubik's cube
Leadership
Leadership
Leadership
The business of AI: Solve real problems for real people
After participating in the Perplexity AI Business Fellowship, one thing became clear: the AI hype cycle is missing the business fundamentals. Here are 3 evidence-based insights from practitioners actually building or investing in AI solutions that solve real problems.
Cathy Colliver
Cathy Colliver
Future-proof innovative software
ai-ml
product-innovation
greenfield-product-development
founders
scaling-challenges
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Leadership
Leadership
Leadership
Pragmatic approaches to agentic coding and AI for engineering leaders
Discover essential practices for AI agentic coding to enhance your team’s AI development learning and adoption, while avoiding common pitfalls of vibe coding.
Test Double Editorial Board
Test Double Editorial Board
Software tooling & tips
ai-ml
productivity
product-innovation
efficient software
teams
Developers
Developers
Developers
16 things software developers believe, per a Justin Searls survey
Ruby on Rails developer Justin Searls made a personality quiz, and more than 7,000 software developers filled it out. Here's what it revealed.
Justin Searls
Justin Searls
Accelerate quality software
community
testing
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Developers
Developers
Developers
Ratcheting to zero: How incremental constraints eliminate technical debt
How we made working with legacy code enjoyable: measure what you want to improve → automate it → make a change. Repeat. The demonstrable march toward improvement is what makes development satisfying.
Dave Mosher
Dave Mosher
Legacy modernization
tech-debt
legacy-modernization
quality
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