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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
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DevOps
Scale infrastructure smoothly
Upgrade Rails
Update Rails versions seamlessly
Technical Recruitment
Build tech & product teams
Technical Assessments
Uncover root causes & improvements
Case Studies
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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
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RECENT DEPLOYMENTS:
crane
Hypermedia API architecture at MoveHQ

Hypermedia API architecture at MoveHQ

craft
GraphQL API architecture at PGA

GraphQL API architecture at PGA

speed
Legacy billing modernization at UPG of UVA

Legacy billing modernization at UPG of UVA

integration
Developer tooling at GitHub

Developer tooling at GitHub

bug
User Experience paper cuts at GitHub

User Experience paper cuts at GitHub

monkey-wrench
Developer tooling at Shutterstock

Developer tooling at Shutterstock

Agent #
003

Jason Karns

#Development
Location pin icon
Columbus, OH
Twitter company logoGitHub company logoLinkedIn company logoInternet logo
his
mission (
he
chose to accept it):
Seek, destroy and prevent tech debt

API architecture

JavaScript

devX tooling

devops/yml

Ruby/Rails

Noteworthy Achievements:
  • Architected a modern REST API in Rails for a legacy CRM system saddled with tech debt
  • Iteratively (ShapeUp) delivered GraphQL API and established an eventing pattern in Rails
  • Designed developer tooling for a/b testing, feature flagging, and beta rollouts
  • Built developer experience tooling and established practices for continuous deployment
  • Modernized a legacy healthcare billing system under tight deadlines
  • Reverse engineered binary network protocols and implemented Ruby libraries for them
Dossier Quotes:
A green circle depicting the outline of a human.
Reports from the field:
🔗
GitHub shortcut commands that’ll speed up your code reviews
🔗
Migrating from Travis CI to GitHub Actions: A first look
Jason Karns
's
Latest Projects:
View all insights
RECENT DEPLOYMENTS:
Hypermedia API architecture at MoveHQ

Hypermedia API architecture at MoveHQ

GraphQL API architecture at PGA

GraphQL API architecture at PGA

Legacy billing modernization at UPG of UVA

Legacy billing modernization at UPG of UVA

Developer tooling at GitHub

Developer tooling at GitHub

User Experience paper cuts at GitHub

User Experience paper cuts at GitHub

Developer tooling at Shutterstock

Developer tooling at Shutterstock

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