Cyrille Quemin
VP Of Engineering at PHOSIS
Burlington, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolCyrille Quemin is a seasoned engineering leader and VP of Engineering with over a decade of experience modernizing legacy monoliths into cloud-native, microservice-driven platforms and rebuilding data engineering with ML-driven forecasting. He has built engineering functions from scratch—spanning front-end, back-end, platform, QA, data and IT—helping scale organizations from a single employee to 300+ and driving acquisitions through product and operational excellence. Known for steady refactoring balanced with greenfield initiatives, he combines deep technical fluency with strategic product oversight and security-by-design practices. An active contributor to Shopify’s JavaScript libraries, his backend work enhanced session storage and webhook security across MySQL/PostgreSQL and improved HMAC timestamp validation. Based in Burlington, Ontario, he thrives on coaching high-performing, autonomous teams that anticipate change and continuously improve customer outcomes.
10 years of coding experience
13 years of employment as a software developer
Software engineer (Master Degree) Computer Science, Software engineer (Master Degree) Computer Science at EPSI - L'école d'ingénierie informatiqueDEUG MIAS (L2) Mathematics and Computer Science, DEUG MIAS (L2) Mathematics and Computer Science at Université Claude Bernard Lyon 1
English, French, French, English
Github Skills (15)
user-authentication10
authentication10
typescript10
javascript10
typescripts10
api10
postgresql10
sql10
mysql10
shopify10
typescript-types10
webhooks10
testing10
database-management9
error-handling9
Programming languages (7)
Github contributions (5)
Shopify/shopify-app-js
Nov 2022 - Mar 2023
Role in this project:
Back-end Developer
Back-end DeveloperContributions:53 reviews, 135 commits, 17 PRs in 3 months
Contributions summary:Cyrille contributed to the session storage implementations for MySQL and PostgreSQL databases within the Shopify app framework. The user's commits primarily focused on querying the information schema tables for existing session tables, as well as adding tests to support multiple databases on the same host instance for both MySQL and PostgreSQL session storage. These changes aimed to enhance the session storage functionality and support for different database setups.
Shopify/shopify-api-js
Dec 2022 - Jan 2023
Shopify Admin API Library for Node. Accelerate development with support for authentication, graphql proxy, webhooks
Role in this project:Back-end Developer
Back-end DeveloperContributions:37 reviews, 17 commits, 6 PRs in 1 month
Contributions summary:Cyrille primarily focused on improving the Shopify API library's functionality, specifically addressing session handling and webhook processing. Their contributions include raising exceptions for invalid session inputs and correcting errors within the webhook processing logic. Furthermore, the user added HMAC timestamp validation to enhance the security of the OAuth flow, ensuring the integrity of requests. Finally, the user contributed to the library versioning and testing frameworks.
apigraphql-authenticationadminproxyjavascript
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