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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
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
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RECENT DEPLOYMENTS:
journey
Frontend rewrite in new technology

Frontend rewrite in new technology

education
Leading workshops

Leading workshops

smart-home
Refactor to new architecture

Refactor to new architecture

shopping
Build webapp to match mobile app

Build webapp to match mobile app

Agent #
00155

Josh Justice

#Development
Location pin icon
Conyers, GA
Twitter company logoGitHub company logoLinkedIn company logoInternet logo
his
mission (
he
chose to accept it):
Applying proven techniques to new technologies

Evolutionary design

Writing

Testing and TDD

React & React Native

Training

Noteworthy Achievements:
  • Equipped an organization to rewrite a 500,000 line frontend in React. Established architectural patterns, delivered a Playbook, and paired with client developers.
  • Led a team to build React web version of pre-existing mobile apps for a nationwide company, reaching feature parity in six months.
  • React and React Native testing workshops and talks at React Native EU, React Advanced London, and Chain React.
  • Migrated a React Native app (Android+iOS) to an improved design/architecture, converting and releasing one screen at a time.
  • Implemented a React “block-based” page editor within a CMS to give nontechnical content editors flexibility within the design system’s constraints.
Dossier Quotes:
A green circle depicting the outline of a human.
Reports from the field:
🔗
Getting the exercises in Programming Flutter working
🔗
Finding the right React component in the MUI design system
🔗
How to set up Rails app on AWS Elastic Beanstalk
🔗
Creating advanced line graphs in React with MUI X Charts
🔗
What happened to BeOS, the 90s’ coolest failed operating system?
🔗
The nine best recommendations in the new React docs
🔗
Creating your own virtual machine for fun and profit
🔗
Field Report: The final Strange Loop
🔗
A guide to building a custom ESLint rule for React Testing Library
🔗
How to create custom linting rules in React Testing Library
🔗
The web won't replace native mobile
🔗
Sustainable Learning
🔗
Side project success: 4 tips to stay focused and motivated
Josh Justice
's
Latest Projects:
View all insights
RECENT DEPLOYMENTS:
Frontend rewrite in new technology

Frontend rewrite in new technology

Leading workshops

Leading workshops

Refactor to new architecture

Refactor to new architecture

Build webapp to match mobile app

Build webapp to match mobile app

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.
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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.

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