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Services Overview
Holistic software investment consulting
Software Delivery
Accelerate quality software development
Product Management
Launch modern product orgs
Legacy Modernization
Renovate legacy software systems
Cycle icon
DevOps
Scale infrastructure smoothly
Upgrade Rails
Update Rails versions seamlessly
Technical Recruitment
Build tech & product teams
Technical Assessments
Uncover root causes & improvements
Case Studies
Solutions
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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
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Bold opinions and insights for tech leaders
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Essential coding tutorials and tools
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Practical advice for real-world challenges
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Explore all agents
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RECENT DEPLOYMENTS:
yarn
Technical debt
laptop
Front-end development
organization
Team culture & processes
bug
Testing

Testing

robot
AI/ML
Agent #
007

Dave Mosher

#Development
Location pin icon
Kemptville, Ontario, Canada
Twitter company logoGitHub company logoLinkedIn company logoInternet logo
his
mission (
he
chose to accept it):
Breadth by default, depth on demand

JavaScript

Frontend

Basketball

Explaining CORS

World of Warcraft

Noteworthy Achievements:
  • Grew YouTube channel to 7,000 subscribers teaching AngularJS, pivoted to synthesizer jams because why not
  • Reduced enterprise codebase by 200,000+ lines while improving performance, nobody misses them
  • Diagnosed and fixed performance bottlenecks for Fortune 500 sites, page loads 3x faster
  • Evolved from print designer to full-stack engineer, still judge everyone’s kerning
  • Shipped critical features at 3 startups spanning reputation management, fintech, and auth platforms
Dossier Quotes:
When I become a millionaire javascript developer (heh) I'm DEFINITELY going to remember you. I love the way you explain things, especially your pace. You don't waste time with the simple stuff, while at the same time not focusing solely on stuff that requires loads of experience.
A green circle depicting the outline of a human.
YouTube
Alex McMillan
Reports from the field:
🔗
Build with HTMX: Simplify development with a return to fundamentals
🔗
Pragmatic approaches to agentic coding and AI for engineering leaders
🔗
Ratcheting to zero: How incremental constraints eliminate technical debt
🔗
From resistance to results: Why agentic coding requires a new mindset
🔗
End-to-End Testing Auth Flows with Playwright and Next.js
🔗
From engineer to consultant: The powerful shift from inward to outward focus
🔗
Better alternatives to story points for software product teams
🔗
Beyond MVP: Why your most valuable tactic matters
🔗
CSS: the visual state machine
🔗
The consultant's code: Building trust in effective software consulting
🔗
Makefiles made easy: Key tips for beginners
🔗
Agent Dossier: Dave Mosher
Dave Mosher
's
Latest Projects:
View all insights
RECENT DEPLOYMENTS:
Technical debt
Front-end development
Team culture & processes
Testing

Testing

AI/ML
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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.

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