Jeff Madsen
Founder at Mahana Designs, LLC
Kobe, Hyogo Prefecture, Japan
Summary
👤
Senior🎓
Top SchoolJeff Madsen is a founder and full-stack developer with 14 years of hands-on experience building scalable web applications across PHP back ends (Laravel, CodeIgniter, WordPress), modern front-ends (Vue, React, Angular) and diverse databases (MySQL, PostgreSQL, Oracle, MongoDB, Redis). He runs Mahana Designs, managing distributed teams and delivering SaaS, e-commerce, and enterprise projects while excelling at architecture, scoping, and client communication across timezones and cultures. Jeff has led microservice-based architectures for workforce and property management platforms, reduced technical debt in legacy codebases, and integrated complex third-party APIs including Apple/Google Wallet and OpenAI. A pragmatic test-driven engineer, he champions automated suites, event sourcing patterns, and containerized deployments to improve reliability and release velocity. He’s also contributed to the popular CodeIgniter Ion Auth library, improving authentication robustness—illustrating a long-term habit of useful open-source collaboration. Based in Kobe, Japan, he pairs entrepreneurial leadership with deep technical craftsmanship and a preference for well-documented, extensible code.
15 years of coding experience
7 years of employment as a software developer
Computer Engineering, Computer Engineering at Clark UniversityBA, Int'l Economics, BA, Int'l Economics at University of Wisconsin-Madison
English, Japanese, Spanish
Stackoverflow
3,655reputation
580kreached
187answers
44questions
middleware
top-5%
php
top-5%
codeigniter
top-1%
Github Skills (17)
user-authentication10
authentication10
php10
codeigniter10
middleware9
databases9
database-design9
database9
documentation8
sql6
laravel-spark6
htaccess6
laravel6
jquery6
phpunit6
Programming languages (7)
Github contributions (5)
benedmunds/CodeIgniter-Ion-Auth
Jan 2013 - Jan 2013
Simple and Lightweight Auth System for CodeIgniter
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 commits in 14 days
Contributions summary:Jeff made several contributions focused on improving the Ion Auth library's functionality and maintainability. Their work includes adding documentation for the `add_to_group()` function, implementing a function to retrieve the user ID from the session, and refactoring the session setting logic. Furthermore, they made updates to the `create_group()` and `update_group()` functions, and corrected hook names in the session-setting function. These commits collectively enhance the usability and robustness of the authentication system.
authcodeigniter
jrmadsen67/mahana-hierarchy-laravel
Oct 2014 - Nov 2015
Contributions:26 commits, 3 pushes in 1 year 1 month
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