Casey Rosengren
Building Something New at Independent
New York City Metropolitan Area United States
Summary
🤩
Rockstar🎓
Top SchoolCasey Rosengren is a founder and growth operator with 14 years of experience helping product-led, early-stage B2B SaaS and dev tools teams find repeatable go-to-market motion. He bootstrapped Hacker Paradise to $500k+ ARR before exiting, then led cross-portfolio growth initiatives at Xenon Partners focused on ICP development, content engines, outbound, and acquisition diligence. Casey now runs a boutique advising and coaching practice (No Small Plans) and consults through VGBNDs, combining qualitative customer research with hands-on execution across content, outbound, and measurement. He pairs founder coaching—rooted in evidence-based practices and writing on founder psychology—with technical chops evidenced by backend contributions to open-source A/B testing tooling. Based in the NYC area, he’s currently researching opportunities at the intersection of AI, developer tools, and community-driven products. He’s happiest translating messy customer conversations into focused GTM experiments that scale.
14 years of coding experience
6 years of employment as a software developer
Telecommunications and Computer Science, Telecommunications and Computer Science at Bergen AcademiesKoshigaya High School, KoshigayaRotary Youth ExchangeHigh School, High School at Glen Rock High SchoolBA, Business, BA, Business at Wharton School of Business, University of Pennsylvania
English, Japanese
Github Skills (8)
ruby10
ruby-rails10
rails10
ab-testing10
abtest10
testing10
rack8
redis7
Programming languages (4)
Github contributions (5)
splitrb/split
Nov 2013 - Oct 2014
:chart_with_upwards_trend: The Rack Based A/B testing framework
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:7 commits in 10 months
Contributions summary:Casey primarily focused on improving the A/B testing framework's core logic. They rewrote the z-score algorithm and refactored it into a separate module, indicating a focus on statistical correctness and modularity. Furthermore, the user added functionality for calculating the probability of an alternative being the winner, using beta distribution calculations and fixed an RSpec test related to time mocking, showing attention to both core functionality and testing. Their work clearly involves manipulating and extending the backend logic of the rack-based A/B testing framework.
splitredistesting-frameworkcharta-b-testing
caser/airbnbs-for-team-retreats
Dec 2015 - Jan 2016
Contributions:26 commits, 20 pushes, 2 branches in 14 days
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