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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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Rubber duck next to a Rubik's cube

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

Future-proof innovative software

Agentic coding pair programmer robot toy in a box

Pragmatic approaches to agentic coding for engineering leaders

Test Double Editorial Board

Test Double Editorial Board

Software tooling & tips

16 things software developers believe, per a Justin Searls survey

Justin Searls

Accelerate quality software

Cog, danger signs, and chart showing metrics trends

Ratcheting to zero: How incremental constraints eliminate technical debt

Dave Mosher

Legacy modernization

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

Person standing in a tunnel looking out on a bright city landscape

From resistance to results: Why agentic coding requires a new mindset

A candid conversation among experienced developers reveals why initial resistance to AI coding tools often gives way to breakthrough productivity—and what that shift means for how we think about software development.

Dave Mosher

Accelerate quality software

ai-ml

dev-experience

efficient software

productivity

professional-growth

Dumpster fire next to a bike shed

You’re holding it wrong! The double loop model for agentic coding

Joé Dupuis has noticed an influx of videos and blog posts about the "correct" way of working with AI agents. Joé thinks most of it is bad advice, and has a better approach he wants to show you.

Joé Dupuis

Accelerate quality software

ai-ml

productivity

product-innovation

greenfield-product-development

Don't play it safe: Improve your continuous discovery process to reduce risk

We often front-load discovery to feel confident before building—but that’s not real agility. This post explores how continuous learning reduces risk better than perfect plans ever could.

Doc Norton

Product management

agile

discovery-validation

product-innovation

outcomes-over-outputs

Line chart increasing from left to right

How an early-stage startup engineering team improved the bottom line fast

A fast-growing startup was burning cash faster than it could scale. Here’s how smart engineering decisions helped them improve the bottom line.

Jonathon Baugh

Maximize software investment

efficient software

security

outcomes-over-outputs

Desktop computer with session flow chart and security lock

End-to-End Testing Auth Flows with Playwright and Next.js

Streamline authentication testing in your Next.js applications, regardless of your auth provider. This practical guide demonstrates how to use Playwright's powerful features to create reusable test helpers, implement efficient session caching, and debug with confidence.

Dave Mosher

testing

typescript

react

efficient software

Three people embark on a journey

ESOP explained: How employee ownership really works at Test Double

Being 100% employee-owned means every Test Double agent shares in the company’s success. Here’s how our ESOP works and why it matters.

Todd Kaufman

Communication & teams

teams

communication

community

esop

esop

Gauge dial with icons of happy face, arrow, and dollar sign

Audentes Fortuna Iuvat: being bold amidst uncertainty

What should businesses do in the face of uncertainty? This is not the first time leaders are dealing with strange economic environments, and it won’t be the last.

Ed Frank

Maximize software investment

budgeting

efficient software

eliminate-waste

outcomes-over-outputs

Rubber duck wearing a trench coat and fedora against a colorful background

LLMallard: the low-key AI chat bot you secretly need

The most perfect dev workflow for taking advantage of deeply powerful AI tooling that’s hyper efficient on token usage with minimal API calls—and the perfect pair programming partner.

Daniel Huss

Software tooling & tips

ai-ml

communication

developer-experience

productivity

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