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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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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
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Leadership
Leadership
Leadership
Healthcare software teams keep fixing symptoms: Real problems run deeper

Healthcare engineering and product teams spend more time managing technology than improving care. Original survey data, industry research, and expert interviews reveal the macro trends and investment patterns holding healthcare software back in 2026.

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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Developers
Developers
Developers
Get in the box: Illustrated permissions guide to make Claude chill
Joé Dupuis
Joé Dupuis
AI
Nesting boxes unfold from decorative to scaffolding to hardware
Leadership
Leadership
Leadership
We're about to unwind fifty years of "Progress"
Doc Norton
Doc Norton
AI
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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
How bikeshedding impacts tech leadership and how to stop it
Dive into the bikeshedding phenomenon in tech leadership. Learn how to identify it, address it, and promote better communication within your teams.
Joshua Wehner
Joshua Wehner
Communication & teams
communication
teams
Person sits at a desk and pumps their fists into the air
Developers
Developers
Developers
3 keys to upgrading Rails with minimal risk and disruption
Learn the 3 keys to upgrading Ruby on Rails smoothly. Ensure minimal risk and disruption to ongoing feature development with our Rails upgrades expert tips and tools.
Kevin Solorio
Kevin Solorio
Rails upgrades
rails
ruby
Developers
Developers
Developers
CSS: the visual state machine
Thinking of web applications in terms of state machines is not a new idea, but there is an often overlooked area when it comes to managing state in web applications: the visual or presentation layer.
Dave Mosher
Dave Mosher
Software tooling & tips
api
javascript
teams
accessibility
conference-talk
Product managers
Product managers
Product managers
How to run effective retrospectives for agile teams
Learn how to run effective retrospectives for your agile team with this comprehensive guide, promoting open communication and continuous improvement.
Brittany Moore
Brittany Moore
Communication & teams
agile
consulting
teams
communication
Developers
Developers
Developers
A practical guide to AWS Lambda and serverless
With all the hype around serverless, it’s hard to separate value from marketing fluff. Dive into the "Serverless Manifesto" and see if AWS Lambda truly benefits your needs.
Micah Adams
Micah Adams
DevOps & security
aws
cloud
testing
Developers
Developers
Developers
Growing strong without the burnout in consulting
Dive into a consultant’s journey of learning and growth. Discover how to tackle challenges without succumbing to burnout in the fast-paced world of consulting.
Mike Jansen
Mike Jansen
Recruiting & careers
communication
professional-growth
consulting
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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