Caleb Crane
Fractional CTO at Gruis, LLC
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolCaleb Crane is a seasoned Fractional CTO with over 25 years of technology and business experience, primarily in Japan, who specializes in turning complex logistics, e-commerce, and data-driven ideas into production-ready systems. He has led architecture and delivery for startups and multinationals, built and managed engineering teams across cultures, and delivered large-scale product catalogs, headless commerce, and edge/cloud hybrid systems handling unreliable connectivity. Hands-on across the stack, Caleb blends software, devops, SRE and security expertise—evidenced by long-running open-source contributions to API tooling—and applies practical machine learning and computer vision to real-world workflows. He’s data-driven, bilingual in English and Japanese, and comfortable shipping pragmatic, observable architectures using Docker, PostgreSQL, event-driven pipelines and Kubernetes. An early hacker who literally landed his first job after dumpster-diving for old PCs, he brings a curious, resourceful mindset to technology due diligence and product leadership.
16 years of coding experience
21 years of employment as a software developer
Executive MBA, Executive MBA at Quantic School of Business and TechnologyB.S, Computer Science and Asian Studies, B.S, Computer Science and Asian Studies at St. Lawrence University
Github Skills (12)
rspec10
api-rest10
rest-api10
api10
grapesjs10
validation10
apidoc10
validations10
api-design10
restful-api10
gr10
ruby10
Programming languages (7)
Github contributions (5)
ruby-grape/grape
Sep 2012 - Nov 2012
An opinionated framework for creating REST-like APIs in Ruby.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits in 1 month
Contributions summary:Caleb primarily focused on enhancing the Grape API framework. Their contributions included implementing features for nested namespace validations and adding support for HTTP 405 responses for unsupported methods, improving API robustness. The user also addressed issues related to explicit return calls within the framework, and refined custom validation handling, alongside writing related tests. The changes indicate a focus on API design and improving the framework's reliability and functionality.
ruby-on-railsapirails-apirubyrest
gruis/Impel
Aug 2010 - Jul 2015
Contributions:3 commits, 1 push, 1 branch in 4 years 11 months
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