Guillermo Mansilla
Senior Solutions Architect at Amazon Web Services (AWS)
Old Toronto, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolGuillermo Mansilla is a Senior Solutions Architect at AWS with 13 years of hands-on software engineering and cloud experience, specializing in serverless, DevOps, architecture reviews, cost optimization, and building production-ready PoCs. He has a proven track record re-architecting cloud infrastructure for high availability and implementing CI/CD, blue/green deployments, and real-time monitoring to improve SLAs. A longtime mentor and team builder, he has led process improvements from TDD adoption to code reviews and branching strategies across startups and scale-ups. Guillermo also contributes to notable open-source projects in the CakePHP ecosystem, focusing on documentation clarity and robust migration tooling—work that underscores his attention to developer experience and maintainability. Based in Old Toronto, he pairs technical depth with an MBA-informed business perspective, helping customers translate architectural decisions into measurable business outcomes.
13 years of coding experience
17 years of employment as a software developer
Software Engineering Technology, School of Engineering Technology and Applied Science, Software Engineering Technology, School of Engineering Technology and Applied Science at Centennial CollegeNetworks and Communications Engineering, Networks and Communications Engineering at Universidad Tecnológica del Centro (UNITEC)Master of Business Administration (MBA), Business/Managerial Economics, Master of Business Administration (MBA), Business/Managerial Economics at Universidad de Carabobo
English, Spanish
Stackoverflow
3,839reputation
540kreached
153answers
4questions
cakephp
top-5%
php
top-5%
Github Skills (22)
database-migrations10
cakephp10
php10
web-framework10
database-migration10
documentation10
testing9
validations9
validation9
orm9
configuration-file8
configuration-management8
configurations8
html6
vagrant6
Programming languages (7)
Github contributions (5)
CakeDC/migrations
Jul 2012 - Feb 2014
Migrations Plugin for CakePHP
Role in this project:
Backend Developer
Backend DeveloperContributions:47 commits in 1 year 7 months
Contributions summary:Guillermo primarily contributed to the CakePHP migrations plugin. Their work involved fixing bugs related to index handling, ensuring indexes are deleted when fields are removed. They also fixed tests to reproduce conditions described in issues. Additionally, the user added support for rolling back migrations and ignored errors when resetting migrations.
phpmigrationscakephp
cakephp/cakephp
Aug 2014 - Aug 2014
CakePHP: The Rapid Development Framework for PHP - Official Repository
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits in 2 days
Contributions summary:Guillermo primarily contributed to the CakePHP framework by correcting documentation links, fixing typos, and updating documentation references to the 3.0 version. Their work was focused on improving the clarity and accuracy of the framework's documentation, specifically within the `src/Validation` and `src/basics.php` directories. These changes demonstrate a focus on maintaining code quality and ensuring developers have access to accurate information about the framework. The user also worked on merging changes from the 3.0 branch.
php-frameworkormform-buildervalidationpsr-7
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