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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
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Hot takes and tips for all things software
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Bold opinions and insights for tech leaders
Developer
Essential coding tutorials and tools
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Practical advice for real-world challenges
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Leadership
Leadership
Leadership
Legacy systems and delivery pressure: Symptoms healthcare tech teams keep treating

Healthcare product and engineering teams stay busy fixing bugs, modernizing systems, and shipping features faster. But when the root cause is process, culture, or misalignment—not code—the same problems keep coming back.

Cathy Colliver
Cathy Colliver
Legacy modernization
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Developers
Developers
Developers
How to build a documentation companion with Claude skills: six lessons from the field
Jeremy Fairbank
Jeremy Fairbank
AI
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Leadership
Leadership
Leadership
Healthcare software teams keep fixing symptoms: Real problems run deeper
Cathy Colliver
Cathy Colliver
Legacy modernization
Ensō (Zen circle) with digital flourishes
Developers
Developers
Developers
🐍 Functionally Zen
Kyle Adams
Kyle Adams
Future-proof innovative software
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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
Developers
Developers
Developers
How a supportive buddy can transform your remote onboarding experience
Step inside Test Double’s unique approach to remote onboarding. Learn from our Onboarding Buddies how we make every new hire feel welcome and connected from day one!
Jason Allen
Jason Allen
Recruiting & careers
teams
remote-work
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Developers
Developers
Developers
What is a Meta Programmer?
What's it mean for a founder to go back to being an individual contributor at their own company? Justin Searls is about to find out!
Justin Searls
Justin Searls
Accelerate quality software
agile
communication
productivity
professional-growth
Leadership
Leadership
Leadership
The Test Double way: how we create great software and even better teams
Learn about Test Double's unique approach to software development, where shared values and a commitment to continuous improvement create great software and exceptional teams.
Cathy Colliver
Cathy Colliver
Accelerate quality software
teams
communication
Developers
Developers
Developers
Why you need the new Standard Ruby VS Code extension
Explore how the latest VS Code Ruby extensions can make your coding faster and more enjoyable. Perfect for Ruby developers looking to boost productivity!
Justin Searls
Justin Searls
Accelerate quality software
ruby
testing
standard-ruby
It's literally impossible to learn everything there is to learn about programming. And there's no need to.
Developers
Developers
Developers
Sustainable Learning
Josh Justice shares an approach to learning that he stumbled upon to avoid mistakes that may be hindering your learning, make the flow of information manageable, solidify your skills, and feel motivated all along the way.
Josh Justice
Josh Justice
Recruiting & careers
agile
professional-growth
Caution sign
Developers
Developers
Developers
Get safer TypeScript code with Zod: a practical guide
Discover the power of Zod in validating TypeScript schemas, making your code more robust and error-free. Perfect for developers looking to improve their TypeScript skills.
Joseph Lozano
Joseph Lozano
Software tooling & tips
typescript
Illustration showing one person's head is full of jumbled up lines, and the other person's head is full of stars and neat circles
Developers
Developers
Developers
How to safely improve your database schema
Ever thought of tweaking your database without halting operations? Dive into our guide on making non-disruptive schema changes effectively.
Justin Schoen
Justin Schoen
Software tooling & tips
agile
Developers
Developers
Developers
Super Standard: How to add gem extensions and custom rules to Standard Ruby
Discover how the new extend_config option in Ruby Standard 1.22.1 allows you to tailor your code formatting to fit your team's needs, reducing debates and boosting productivity.
Justin Searls
Justin Searls
Accelerate quality software
ruby
testing
open-source
standard-ruby
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