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Services Overview
Holistic software investment consulting
Software Delivery
Accelerate quality software development
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Launch modern product orgs
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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
Software Delivery, DevOps, & Product Delivery
Maximize Software Investments
Product Performance, Product Scaling, & Technical Assessments
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About
About
About
What's a test double?
Approach
Meeting you where you are
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Culture & Careers
Double Agents decoded
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Great code for great causes
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Bold opinions and insights for tech leaders
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Insights for great software & great teams

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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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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Developers
Developers
Developers
C# and .NET tools and libraries for the modern developer
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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Double Takes

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Double Takes

Friday afternoon hot take (after a couple months of engineering exclusively with coding agents):

Context/prompting is a crutch that will only get you so far.

The AI agent does not have a true understanding of both:

  • The business logic that the code it is generating represents
  • The wider system(s) that it is being written to run within

IOW the why of the code.

The result is that no matter how hard you try it is not able to consistently apply rules and/or conventions (eg: logically organizing/co-locating code).

Tom Nightingale

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
Things I wish I knew before going remote
Developers
Developers
Developers
Things I wish I knew before going remote
In this RailsConf 2019 talk Marla Brizel Zeschin shares hard learned lessons on better collaboration while working remote that are even more relevant today as remote work is more common.
Marla Brizel Zeschin
Marla Brizel Zeschin
Communication & teams
communication
testing
rails
teams
Designing an interview process that works
Ever felt lost in a tech interview? At Test Double, we make interviews meaningful and relevant. Dive into how our process respects your time and skills.
Ilana Corson
Ilana Corson
Recruiting & careers
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Interview them where they are
Leadership
Leadership
Leadership
Interview them where they are: Master the art of conducting technical interviews
Discover effective techniques to conduct technical interviews, focused on inclusivity and identifying essential software engineering skills.
Eric Weinstein
Eric Weinstein
Recruiting & careers
professional-growth
Developers
Developers
Developers
Optimize Rails enums with Postgres: A guide
Struggling with Rails enums? Discover how PostgreSQL can simplify your enums and enhance performance. This guide covers setup, migration, and best practices.
Justin Searls
Justin Searls
Accelerate quality software
testing
ruby
rails
postgres
Developers
Developers
Developers
Simplify your code: the power of extracting functions in refactoring
Discover how extracting functions can simplify your code, improve readability, and enhance maintainability. Dive into best practices and practical examples.
Kevin Baribeau
Kevin Baribeau
Legacy modernization
react
testing
javascript
legacy-modernization
tech-debt
Terminal screen showing code example
Developers
Developers
Developers
Abusing promises as a locking mechanism in JavaScript
Learn to leverage JavaScript promises in unexpected ways. Promises in JavaScript are made for asynchronous data, but aside from that data you can glean a little extra information: timing.
Neal Lindsay
Neal Lindsay
Software tooling & tips
javascript
node.js
testing
automation
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Developers
Developers
Developers
The Selfish Programmer
In Justin Searls' seminal RailsConf 2019 talk he explores things programmers can learn by building an application by and for themselves—and the surprising number of lessons that might translate to their work on teams and larger organizations.
Justin Searls
Justin Searls
Accelerate quality software
consulting
heroku
javascript
postgres
rails
Developers
Developers
Developers
Learning Go: A JavaScript developer’s journey
Discover the phases a JavaScript developer experiences when learning Go, from confusion to curiosity, and how it reshapes their programming approach.
Brittany Moore
Brittany Moore
Software tooling & tips
go
javascript
open-source
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