Joshua Estes
Senior Software Engineer at Checkout Champ
Atlanta, Georgia, United States
Summary
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Rockstar🎓
Top SchoolJoshua Estes is a senior software engineer with 15 years of experience modernizing legacy systems and building maintainable, modular SaaS platforms. He blends hands-on architecture and technical leadership to reduce technical risk, accelerate delivery, and establish robust developer workflows—often by introducing CI/CD, Git-based collaboration, and event-driven designs. As founder of Apex Squid and senior engineer at Checkout Champ, he’s led phased migrations from PHP 5.6 to modern runtimes and built multi-processor payment onboarding systems that unify merchant workflows. He contributes to open-source projects like Mautic and the BitPay PHP client, where his work improved templating, testing, and encrypted storage integration. Based in Atlanta, he excels in environments that need structural modernization, measurable performance improvements, and long-term maintainability over short-term cleverness.
15 years of coding experience
8 years of employment as a software developer
Undergraduate Coursework, Entrepreneurship/Entrepreneurial Studies, Undergraduate Coursework, Entrepreneurship/Entrepreneurial Studies at Chattanooga State
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (13)
mautic10
php10
api10
twig10
templating10
apidoc10
phpunit10
cryptography9
symfony9
symfony-ux9
configuration-management8
marketing-automation8
dependency-injection7
Programming languages (9)
Github contributions (5)
bitpay/php-bitpay-client
Jul 2014 - Dec 2014
PHP implementation for the BitPay cryptographically secure RESTful API
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:71 commits in 4 months
Contributions summary:Joshua contributed to the back-end functionality and testing of the Bitpay PHP client library. They added tests for the `Point` object and updated existing tests for the `Currency` and `SinKey` classes to achieve 100% code coverage. The user also implemented features for encrypted file storage and worked on configuration settings. Furthermore, the user added several tests to test the integration with the API.
secureapicryptographically-securerestfulphp
mautic/mautic
Dec 2022 - Jan 2023
Mautic: Open Source Marketing Automation Software.
Role in this project:Back-end Developer
Back-end DeveloperContributions:52 reviews, 38 commits, 41 PRs in 28 days
Contributions summary:Joshua primarily contributed to migrating views from the PHP Engine to Twig, a templating language, within the Mautic marketing automation software. The contributions involved refactoring components within the CampaignBundle and DashboardBundle, demonstrating a focus on updating the codebase to use modern templating practices. These changes included modifying HTML templates and associated code, thereby improving the project's maintainability and potential performance.
marketing-automationmauticphpautomationsoftware-automation
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