Jeff Casimir
Principal at Next Story Coaching
Denver, Colorado, United States
Summary
🤩
Rockstar🎓
Top SchoolJeff Casimir is a principal technology leader and educator with 16 years of experience building organizations and systems that unlock human potential across startups, enterprise, and nonprofits. As founder and long-time Executive Director of the Turing School and current Principal at Jumpstart Lab, he has scaled training programs that produced thousands of developers and more than $10 billion in community economic impact while helping raise millions for ventures and programs. A hands-on engineer and curriculum builder, Jeff contributes to open-source Ruby/Rails projects and maintains full‑stack curriculum sites that bridge pedagogy and production code. He pairs data-driven delivery leadership with frontline coaching—having guided thousands through career transitions—and brings a rare blend of classroom-tested teaching craft and product delivery muscle. Based in Denver, he combines systems-thinking from a Computer Systems Engineering background with practical experience launching accelerated developer pipelines that convert novices into hire-ready engineers.
16 years of coding experience
14 years of employment as a software developer
BSE, Computer Systems Engineering, BSE, Computer Systems Engineering at Arizona State UniversityBS, Economics, BS, Economics at W. P. Carey School of Business – Arizona State University
Stackoverflow
16reputation
454reached
1answer
0questions
Github Skills (16)
html10
ruby10
rspec10
ruby-rails10
decorators10
rails10
lib10
decorator10
test-automation10
testing10
jekyll9
content-management-system8
content-management8
front-end-development8
activerecord6
Programming languages (9)
Github contributions (5)
drapergem/draper
Jun 2011 - Apr 2015
Decorators/View-Models for Rails Applications
Role in this project:
Back-end Developer
Back-end DeveloperContributions:222 commits, 17 PRs, 20 pushes in 3 years 10 months
Contributions summary:Jeff primarily contributed to the Draper gem, a library for Rails applications that implement decorators. They focused on refining the core functionality of the library. This included fixing a typo in a generator template, refactoring code to use `denies` instead of `excludes`, updating the generated model's instructions, and fixing block handling in the Draper code. Additional changes were made to handle the use of polymorphic paths and class-level method proxying.
decoratorsrailsviewmodelruby
turingschool-examples/ruby-exercises
Jun 2014 - Oct 2021
A collection of exercises to practice various aspects of Ruby
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:15 commits, 4 PRs, 10 pushes in 7 years 5 months
Contributions summary:Jeff's contributions primarily involve modifying test files within the `mythical-creatures` directory. They are revising existing tests, removing tests using `.respond_to`, and adding an expected value for a test. The focus is on the testing of code behavior, likely related to a Ruby-based exercise.
ruby
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