Jesse Mignac
Senior Software Developer at Shopify
Canada
Summary
👤
Senior🎓
Top SchoolJesse Mignac is a Senior Software Developer with 16 years of experience building APIs and integrations, currently shaping platform features at Shopify. He has deep Ruby/Rails expertise and a track record of improving backend reliability and test coverage in well-known open-source projects like Active Merchant and the delayed_paperclip gem. Jesse has also delivered production-grade platform APIs at Kinetic Commerce—learning Elixir to power connected retail experiences that materially boosted conversion—and built healthcare and civic platforms earlier in his career. Comfortable across payments, background processing, and cross-service integrations, he pairs pragmatic engineering with a focus on robustness and observability. Quietly curious, he often contributes subtle but high-impact fixes and tests that make libraries safer and easier to adopt.
16 years of coding experience
7 years of employment as a software developer
Web Development Diploma, Computer Programming, Web Development Diploma, Computer Programming at Unibratec
Portuguese, English
Stackoverflow
305reputation
9kreached
6answers
6questions
Github Skills (18)
ruby-rails10
testing10
rails10
ruby10
activemerchant10
paperclip10
test-automation10
payment-gateway9
minitest6
ruby-on-rails6
android6
tdd6
activeadmin6
adapter6
bdd6
Programming languages (4)
Github contributions (5)
jstorimer/delayed_paperclip
Mar 2010 - Jun 2013
Process your Paperclip attachments in the background with delayed_job or Resque.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 commits in 3 years 3 months
Contributions summary:Jesse primarily contributed to the backend logic of the `delayed_paperclip` gem, which processes Paperclip attachments in the background. Their work focused on refining the core functionality, including modifying how attachments are processed, renamed methods, and addressed issues related to URL generation. The user also updated and expanded the tests, ensuring the reliability and proper functioning of the asynchronous attachment processing system. Overall, the changes are focused on improving the robustness and usability of the gem.
paperclipresque
activemerchant/active_merchant
Aug 2010 - Dec 2013
Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.
Role in this project:Backend Developer & QA Engineer / Test Automation Engineer
Backend Developer & QA Engineer / Test Automation EngineerContributions:10 commits in 3 years 4 months
Contributions summary:Jesse primarily focused on enhancing and testing the `Active Merchant` library, specifically within the `ActionViewHelper`. Their work involved making the helper compatible with different versions of Rails and ensuring HTML safety. The user also implemented a comprehensive test suite to validate the helper's behavior, including edge cases and correct output generation. Furthermore, the user addressed a bug related to comma-delimited amounts for Valitor integrations, enhancing the library's payment processing capabilities.
activemerchantrubyshopify
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