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Services Overview
Holistic software investment consulting
Software Delivery
Accelerate quality software development
Product Management
Launch modern product orgs
Legacy Modernization
Renovate legacy software systems
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DevOps
Scale infrastructure smoothly
Upgrade Rails
Update Rails versions seamlessly
Technical Recruitment
Build tech & product teams
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Uncover root causes & improvements
Case Studies
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Accelerate Quality Software
Software Delivery, DevOps, & Product Delivery
Maximize Software Investments
Product Performance, Product Scaling, & Technical Assessments
Future-Proof Innovative Software
Legacy Modernization, Product Transformation, Upgrade Rails, Technical Recruitment
About
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About
What's a test double?
Approach
Meeting you where you are
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Double Agents decoded
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Great code for great causes
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Equity, diversity & inclusion
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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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C# and .NET tools and libraries for the modern developer
Patrick Coakley
Patrick Coakley
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Leadership
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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
Double Agent Profile: Jessie Puls
Jessie Puls
Jessie Puls
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Developers
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Using CockroachDB with Rails
Discover how to set up CockroachDB with your Rails app. Follow our step-by-step guide for seamless integration and enhanced scalability.
Ali Ibrahim
Ali Ibrahim
Accelerate quality software
ruby
rails
Developers
Developers
Developers
React Context for dependency injection not state management
Learn how to use React Context for dependency injection instead of state management, with insights from Redux maintainer Mark Erikson.
Tommy Groshong
Tommy Groshong
Software tooling & tips
api
react
javascript
Double Agent Profile: Landon Gray
Landon Gray
Landon Gray
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Rough, uncut gems
Developers
Developers
Developers
How to implement your own Twitter OAuth login flow
Dive into the nuances of dependency management with a practical example of implementing OAuth sign-in for a Ruby on Rails app. Discover the trade-offs and make informed decisions.
Justin Searls
Justin Searls
Accelerate quality software
ruby
rails
security
Developers
Developers
Developers
The best interview process ever for senior software engineers
Nichol Alexander shares an outside perspective on Test Double’s uniquely fair and welcoming interview process for senior software engineers.
Nichol Alexander
Nichol Alexander
Recruiting & careers
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Developers
Developers
Developers
How to completely uninstall and reinstall Homebrew Postgres
Is Postgres erroring with "could not read block 39" or "bad address"? If you installed Postgres via Homebrew on a Mac, here's the quickest way to wipe the slate clean with a fresh install
Justin Searls
Justin Searls
Software tooling & tips
postgres
Author photo and post title
Developers
Developers
Developers
Adding disallowed deprecations to Rails 6.1
Discover how the Disallowed Deprecations feature in Rails 6.1 helps you maintain your app efficiently. Say goodbye to pesky deprecation warnings for good!
Cliff Pruitt
Cliff Pruitt
Rails upgrades
rails
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