Skip to main content
Test Double company logo
Services
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
Upgrade Rails
Update Rails versions seamlessly
DevOps
Scale infrastructure smoothly
Technical Recruitment
Build tech & product teams
Technical & Product Assessments
Uncover root causes & improvements
Case Studies
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
What's a test double?
Approach
Meeting you where you are
Founder's Story
The origin of our mission
Culture
Culture & Careers
Double Agents decoded
Great Causes
Great code for great causes
EDI
Equity, diversity & inclusion
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
Say Hello
Test Double logo
Menu
Services
BackGrid of dots icon
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
Cycle icon
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
Say hello

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.

Sign up and get insights delivered to your inbox.

How-to guides, tooling tips and real-world advice for developers and product managers tired of broken software. Let’s fix this mess together.

Want to talk shop or tackle a problem in real time? Unpack it with a developer or product manager.

Get our newsletter
Grab time now
Rubber duck stands next to a power up mushroom
Developers
Developers
Developers
Power up scripts for Rails apps Part 3: Kubernetes

In part 3 of the three part series on Rails scripts, learn about short shell scripts for simplifying Kubernetes interactions from Rails apps.

Ed Toro
Ed Toro
Software tooling & tips
Rubber duck wearing a trench coat and fedora stands next to a mushroom.
Developers
Developers
Developers
Power up with Rails scripts Part 2: Docker
Ed Toro
Ed Toro
Software tooling & tips
Rubber duck wearing a trench coat and fedora next to a mushroom
Developers
Developers
Developers
Power up with Rails scripts Part 1: Environment setup
Ed Toro
Ed Toro
Software tooling & tips
Rubber duck next to a classic marble maze tilt game
Developers
Developers
Developers
Pydantically perfect: Normalize legacy data in Python
Gabriel Côté-Carrier
Gabriel Côté-Carrier
Software tooling & tips
All Categories
Click to select
Clear SElection
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Test Double short-form logo against a green background

Double Takes

+ Expand posts
- Collapse POSTS
Test Double short-form logo against a green background

Double Takes

Dave Mosher explores using LLMs as digital archivists and resurrects his old GeoCities website. (Remember those!)

Dave Mosher

Davemo shares early experiments with Sora 2: discovered some interesting remix bugs and played around with applying it towards a game idea he's been noodling on.

Dave Mosher

A Slack conversation left Doc reflecting on what bug bashes say about the systems we work in.

Doc Norton

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

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
Paint splashes turn into a beautiful piece of art
Leadership
Leadership
Leadership
Building software teams that manage mistakes rather than rejecting them
The software industry shares a pervasive assumption that expert developers don’t make mistakes. Developers are only human. They will make mistakes. Ignoring that means any mistake can lead to a high intensity event. There’s a better way. Invest in systems to manage inevitable mistakes.
Gabriel Côté-Carrier
Gabriel Côté-Carrier
Communication & teams
agile
communication
productivity
professional-growth
teams
Rubber duck next to a Rubik's cube
Leadership
Leadership
Leadership
The business of AI: Solve real problems for real people
After participating in the Perplexity AI Business Fellowship, one thing became clear: the AI hype cycle is missing the business fundamentals. Here are 3 evidence-based insights from practitioners actually building or investing in AI solutions that solve real problems.
Cathy Colliver
Cathy Colliver
Future-proof innovative software
ai-ml
product-innovation
greenfield-product-development
founders
scaling-challenges
Agentic coding pair programmer robot toy in a box
Leadership
Leadership
Leadership
Pragmatic approaches to agentic coding and AI for engineering leaders
Discover essential practices for AI agentic coding to enhance your team’s AI development learning and adoption, while avoiding common pitfalls of vibe coding.
Test Double Editorial Board
Test Double Editorial Board
Software tooling & tips
ai-ml
productivity
product-innovation
efficient software
teams
Developers
Developers
Developers
16 things software developers believe, per a Justin Searls survey
Ruby on Rails developer Justin Searls made a personality quiz, and more than 7,000 software developers filled it out. Here's what it revealed.
Justin Searls
Justin Searls
Accelerate quality software
community
testing
teams
communication
professional-growth
Cog, danger signs, and chart showing metrics trends
Developers
Developers
Developers
Ratcheting to zero: How incremental constraints eliminate technical debt
How we made working with legacy code enjoyable: measure what you want to improve → automate it → make a change. Repeat. The demonstrable march toward improvement is what makes development satisfying.
Dave Mosher
Dave Mosher
Legacy modernization
tech-debt
legacy-modernization
quality
automation
developer-experience
Person standing in a tunnel looking out on a bright city landscape
Developers
Developers
Developers
From resistance to results: Why agentic coding requires a new mindset
A candid conversation among experienced developers reveals why initial resistance to AI coding tools often gives way to breakthrough productivity—and what that shift means for how we think about software development.
Dave Mosher
Dave Mosher
Accelerate quality software
ai-ml
dev-experience
efficient software
productivity
professional-growth
Dumpster fire next to a bike shed
Developers
Developers
Developers
You’re holding it wrong! The double loop model for agentic coding
Joé Dupuis has noticed an influx of videos and blog posts about the "correct" way of working with AI agents. Joé thinks most of it is bad advice, and has a better approach he wants to show you.
Joé Dupuis
Joé Dupuis
Accelerate quality software
ai-ml
productivity
product-innovation
greenfield-product-development
Leadership
Leadership
Leadership
Don't play it safe: Improve your continuous discovery process to reduce risk
We often front-load discovery to feel confident before building—but that’s not real agility. This post explores how continuous learning reduces risk better than perfect plans ever could.
Doc Norton
Doc Norton
Product management
agile
discovery-validation
product-innovation
outcomes-over-outputs
Previous
Load more posts
3 / 46
Letter art spelling out NEAT

You're N.E.A.T.!

Technology is a means to an end: answers to very human questions. We want to connect with other folks who share that belief.

Ways to connect
Test Double Executive Leadership Team

Learn about our team

Like what we have to say about building great software and great teams?

Get to know us
Rubber duck with Rubik's cube
Test Double double agents at retreat
Test Double double agents at retreat
Test Double rubber ducks and stickers
Test Double double agents at retreat
A keyboard, glasses, test double logo and rubber duckies.
Two test double employees wearing test double t-shirts embrace and smile at the camera.
Two people embrace and smile at the camera at a group event.
A person laughs at the camera in a group setting with a group of people.
Test double rubber duckie in a pool.
Rubber duck with Rubik's cube
Test Double double agents at retreat
Test Double double agents at retreat
Test Double rubber ducks and stickers
Test Double double agents at retreat
A keyboard, glasses, test double logo and rubber duckies.
Two test double employees wearing test double t-shirts embrace and smile at the camera.
Two people embrace and smile at the camera at a group event.
A person laughs at the camera in a group setting with a group of people.
Test double rubber duckie in a pool.
Rubber duck with Rubik's cube
Test Double double agents at retreat
Test Double double agents at retreat
Test Double rubber ducks and stickers
Test Double double agents at retreat
A keyboard, glasses, test double logo and rubber duckies.
Two test double employees wearing test double t-shirts embrace and smile at the camera.
Two people embrace and smile at the camera at a group event.
A person laughs at the camera in a group setting with a group of people.
Test double rubber duckie in a pool.

Let’s collaborate

We’re the team on a mission to improve how the world builds software.

Let’s talk about how to tackle hard software investment problems across the entire product life cycle.

Get started
Calendar icon

Chat with our team

Test Double Office Hours

Curious about what we're like to work with? We offer 30-minute turbocharged office hours with no strings attached—just pure, unadulterated brainstorm power.

Learn more
Test Double company logo
Improving the way the world builds software.
What we do
Services OverviewSoftware DeliveryProduct StrategyLegacy ModernizationPragmatic AIDevOpsUpgrade RailsTechnical RecruitmentAssessments
Who WE ARE
About UsCulture & CareersGreat CausesEDIOur TeamContact UsNews & AwardsN.E.A.T.
Resources
Case StudiesAll InsightsLeadership InsightsDeveloper InsightsProduct InsightsPairing & Office Hours
NEWSLETTER
Sign up hear about our latest innovations.
Your email has been added!
Oops! Something went wrong while submitting the form.
Standard Ruby badge
614.349.4279hello@testdouble.com
Privacy Policy
© 2020 Test Double. All Rights Reserved.