Jonathan Andres Garay Mendoza, Developer in Montreal, QC, Canada
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Jonathan Andres Garay Mendoza

Verified Expert  in Engineering

Software Developer

Montreal, QC, Canada
Toptal Member Since
June 16, 2014

Jonathan is an accomplished developer with extensive experience in various technologies related to the financial sector and eCommerce. He places high value on delivering his projects within the set timelines and budget without compromising the quality of his code. His technical proficiency and his commitment to excellence make him an asset to any team he works with.


Valence Labs, Inc.
Ruby on Rails (RoR), Elixir, Shopify API, Stripe, Amazon Web Services (AWS)...
React, Node.js, Ruby on Rails (RoR), Ruby, SOLID Principles, Stripe...
Stowaway Cosmetics
PostgreSQL, Heroku, Ruby on Rails (RoR), Ruby, Stripe...




Preferred Environment

Bash, Zsh, IDEA IDE, MacOS, Git, Emacs, SOLID Principles

The most amazing...

...thing I've worked on is the development of a payment portal for a large Mexican bank.

Work Experience

Ruby Developer

2020 - 2020
Valence Labs, Inc.
  • Worked on the back end, implementing new functionalities.
  • Migrated implementations from Ruby to Elixir and performed database optimizations.
  • Implemented facilities to process large amounts of transactions per minute.
Technologies: Ruby on Rails (RoR), Elixir, Shopify API, Stripe, Amazon Web Services (AWS), TypeScript, Docker, CSS, SQL, HTML, APIs, Tailwind CSS, REST APIs, Back-end, MVC Design

Software Mixologist

2016 - 2018
  • Implemented asynchronous video and data processing using Node.js.
  • Developed front-end functionality using React for a hiring management platform.
  • Supported and modified Spree Commerce plugins for a variety of clients.
  • Created a full API and iOS applications from scratch for a Trello-like startup.
Technologies: React, Node.js, Ruby on Rails (RoR), Ruby, SOLID Principles, Stripe, Amazon Web Services (AWS), TypeScript, Docker, CSS, SQL, HTML, APIs, Tailwind CSS, REST APIs, Back-end, MVC Design

2015 - 2016
Stowaway Cosmetics
  • Maintained the subscription workflow for Spree. And the general page functionality. Added unit and behavior tests to the project.
  • Extended Spree to create custom features for the admin.
  • Created a Spree public API to create a React front-end for the store.
  • Provided general support for the existing legacy code.
Technologies: PostgreSQL, Heroku, Ruby on Rails (RoR), Ruby, Stripe, Amazon Web Services (AWS), CSS, SQL, HTML, APIs, Back-end, MVC Design

Senior Software Developer

2014 - 2016
1A Auto de Mexico
  • Contributed to the new Java-based portal.
  • Created a completely new product involving an ETL and other data conversion technologies.
  • Created the vendor's dedicated interface infrascructure.
  • Added Ansible and Docker deployments for some projects.
  • Provided general data processing and transformation of the business.
Technologies: CodeIgniter, PHP, Microsoft SQL Server, Java, Spring Boot, Stripe, Amazon Web Services (AWS), CSS, SQL, HTML, APIs, MVC Design

Software Developer

2011 - 2013
Crowd Interactive
  • Performed as a consultant for StyleVie, a Ruby on Rails-based eCommerce platform.
  • Collaborated as a consultant and Ruby on Rails back-end developer for GoPago. Migrated the architecture from Rails 2 to Rails 3. Implemented the customers' menu editor.
  • Served as a consultant and Ruby on Rails back-end and front-end developer for BillFloat.
  • Created an iOS client for, an in-house application.
Technologies: Ember.js, Percona, Solr, MySQL, PostgreSQL, Objective-C, Backbone.js, Sinatra, Ruby, Ruby on Rails (RoR), Stripe, Amazon Web Services (AWS), CSS, SQL, HTML, APIs, MVC Design

Senior Software Developer

2008 - 2011
  • Developed the Chihuahua local government vehicle plates registration program.
  • Implemented integration with tax department POSs for the Chihuahua local government pin pad.
  • Created the Chihuahua local government online tax payment system.
Technologies: JSF, Jakarta Server Pages (JSP), Android, Oracle, Java, Amazon Web Services (AWS), SQL, HTML, APIs

System Administrator

2006 - 2008
Total Automation and Controls
  • Created the company ERP.
  • Handled the email, file sharing, and LDAP servers.
Technologies: Linux, .NET, Oracle, Java, SQL, HTML

Junior PHP Developer

2005 - 2006
Conorte Alsuper
  • Supported the provider inventory page.
Technologies: PostgreSQL, Perl, PHP, HTML, APIs

Grendel is a secure storage system for user protected documents. It uses OpenPGP keys to ensure that the data of the user is only accessible by the user and people authorized by the user.

Banorte Payworks gem
This gem simplifies a Mexican bank's payment gateway.

Termbox bindings
A proof-of-concept for using SWIG to easily make Ruby-C bindings.


REST APIs, React, Backbone.js, Stripe, Shopify API, Node.js, React DnD, Vue, jQuery, CocoaPods, Devise


Emacs, Adobe Photoshop, IDEA IDE, Zsh, Fireworks, Git, Solr, Spree


Spring, Spring MVC, Ember.js, Ruby on Rails (RoR), Laravel, Cocoa Touch, Cocoa, Sinatra, ReactiveCocoa, Phoenix, Spring Boot, Tailwind CSS, .NET, Jakarta Server Pages (JSP), JSF, Qt, CodeIgniter, Core Data


Elixir, Ruby, PHP, CoffeeScript, SQL, JavaScript, Java, TypeScript, CSS, HTML, Bash, Objective-C, Erlang, Perl


MVC Design, Model View Controller (MVC), Functional Reactive Programming, Service-oriented Architecture (SOA)


Heroku, MacOS, Linux, Amazon Web Services (AWS), iOS, Docker, Percona, Oracle, Android, Windows, Ubuntu


PostgreSQL, Elasticsearch, CouchDB, MySQL, Microsoft SQL Server, PostGIS


SOLID Principles, APIs, Back-end, Hotwire

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