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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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Line drawing of a rocky mountain peak with a base camp and people building structures

Quality you can’t generate: AI is only as good as your constraints

AI changed the cost structure of software. It didn't change the value structure. The value is no longer the code you write. It's the taste, judgment, and constraints you encode into the system that shapes what AI produces.

Dave Mosher

A figure looks off towards the horizon. On the left is a giant robot, on the right a splash of vibrant color, connected nodes and a city unfurl.

Why we're not chasing the AI hype (And what we're doing instead)

Todd Kaufman

Speed is a side effect of making the system work

Doc Norton

Maximize software investment

Rubber duck in fedora and trench coat stands next to a vintage microphone

IndyPy Talk: Pydantically perfect in every way

Kyle Adams

Software tooling & tips

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

Double Agent Profile: Cliff Pruitt

Cliff Pruitt

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Double Agent Profile: Pier-Luc Faucher

Pier-Luc Faucher

Pier-Luc Faucher

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Best books and resources for software developers

Explore our top picks for books, talks, and tutorials on software development, business, and productivity. Perfect for consultants looking to excel in their field.

Cathy Colliver

Software tooling & tips

professional-growth

consulting

conference-talk

Multicolored ball of yarn being unwound into different colored balls of yarn

A better way to sort Ruby objects: How our Put gem makes sorting by multiple conditions easy

The go-to way to sort Ruby objects by complex criteria is Enumerable's sort_by method. Here's how Test Double's Put gem makes your sorts clearer, terser, and nil-safe.

Justin Searls

Software tooling & tips

ruby

open-source

Double Agent Profile: Eve Ragins

Eve Ragins

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Reflecting on what it means to go back home

Anya Iverova, our head of recruiting, contemplates the deep significance of returning to her roots in Ukraine.

Anya Iverova

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One year growing the People of Color Employee Resource Group

Test Double's People of Color Employee Resource Group (ERG) is celebrating its first year! Help us mark the occasion as we look back on everything the ERG has accomplished in the past year.

Ali Ibrahim

Equity, Diversity & Inclusion

professional-growth

Product managers

Product managers

Product managers

How involving developers in product planning boosts creativity and quality

How to boost product development through collaboration

Minnie Lee

Product management

professional-growth

teams

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