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Services Overview
Holistic software investment consulting
Software Delivery
Accelerate quality software development
Product Impact
Drive results that matter
Legacy Modernization
Renovate legacy software systems
Pragmatic AI
Solve business problems without hype
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DevOps
Scale infrastructure smoothly
Upgrade Rails
Update Rails versions seamlessly
Technical Recruitment
Build tech & product teams
Technical & Product Assessments
Uncover root causes & improvements
Case Studies
Solutions
Solutions
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
About
About
What's a test double?
Approach
Meeting you where you are
Founder's Story
The origin of our mission
Culture
Culture
Culture & Careers
Double Agents decoded
Great Causes
Great code for great causes
EDI
Equity, diversity & inclusion
Insights
Insights
All Insights
Hot takes and tips for all things software
Leadership
Bold opinions and insights for tech leaders
Developer
Essential coding tutorials and tools
Product Manager
Practical advice for real-world challenges
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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
Developers
Developers
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
Dave Mosher
Pragmatic AI
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.
Leadership
Leadership
Leadership
Why we're not chasing the AI hype (And what we're doing instead)
Todd Kaufman
Todd Kaufman
Pragmatic AI
Leadership
Leadership
Leadership
Speed is a side effect of making the system work
Doc Norton
Doc Norton
Maximize software investment
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Developers
Developers
Developers
IndyPy Talk: Pydantically perfect in every way
Kyle Adams
Kyle Adams
Software tooling & tips
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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
There's nothing new under the sun
Developers
Developers
Developers
There's nothing new under the sun
In this RubyConf 2017 talk, Josh Greenwood and Justin Searls rediscover what drew people to Ruby in the years before they joined the community and share a seriously massive (and timeless) resources list.
Justin Searls
Justin Searls
Software tooling & tips
ruby
rails
testing
conference-talk
Jumble of different colored blocks with label The Problem with Booleans
Developers
Developers
Developers
Solving the boolean identity crisis
Learn about the dangers of using booleans in your Elm code and how to write clearer code for you and your teammates with union types.
Jeremy Fairbank
Jeremy Fairbank
Software tooling & tips
elm
testing
data-engineering
Leadership
Leadership
Leadership
Why modern engineering practices are a smart business investment
Learn how modern engineering practices can reduce costs, speed up development, and improve team satisfaction. See why they’re worth the investment.
Daryl Kulak
Daryl Kulak
Maximize software investment
agile
consulting
testing
devops
budgeting
Developers
Developers
Developers
Shape testing with JavaScript streams and Lodash FP
Testing JSON data can be tricky, but with Node.js and functional streams, it's a breeze. Dive into our guide to master I/O tasks and JSON validation seamlessly!
Sam Jones
Sam Jones
Testing
javascript
testing
node.js
api
Pink storm trooper hands a Christmas stocking to one of Emperor Palpatine's guards
Developers
Developers
Developers
How to get better at dealing with failure
Shifting our perception of failure from a setback to a learning tool can enhance team communication, foster resilience, and promote a culture of open dialogue and continuous improvement in software development.
Steve Jackson
Steve Jackson
Testing
aws
teams
testing
conference-talk
Paper dolls give each other a high five
Developers
Developers
Developers
Explore the power of tmux and tmate for teamwork
Join us as we dive into how tmux and tmate transform remote coding sessions into a seamless collaborative experience. Start sharing today.
Sam Jones
Sam Jones
Software tooling & tips
cloud
open-source
security
automation
Tame the frontend with Elm
Developers
Developers
Developers
Tame the frontend with Elm
Discover the benefits of Elm such as no runtime exceptions and helpful compiler error messages. Learn some of Elm's syntax and how to structure applications with the Elm Architecture.
Jeremy Fairbank
Jeremy Fairbank
Software tooling & tips
architecture
elm
javascript
testing
data-engineering
Under pressure
Leadership
Leadership
Leadership
Under pressure: How to handle pressure to go faster
Todd's talk from Agile and Beyond 2017 delves into common pitfalls in fast-paced development environments and offers strategies to foster trust and effective communication between developers and management, ensuring better outcomes and reduced stress.
Todd Kaufman
Todd Kaufman
Communication & teams
go
communication
teams
conference-talk
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Test Double double agents at retreat
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Test Double double agents at retreat
Test Double double agents at retreat
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Test Double double agents at retreat
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