Note: This article is written in collaboration with the Shopify engineering team.

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Shopify processes massive scale with 173 billion requests on Black Friday using a tech stack built on Ruby on Rails, React, MySQL, and Kafka. The platform uses a modular monolith architecture with strict component boundaries, database sharding through isolated pods, and extensive tooling investments including YJIT compiler and Sorbet type checker. The infrastructure handles 284 million requests per minute at peak, 66 million Kafka messages per second, and processes 216 million ML embeddings daily for semantic search, all while maintaining developer productivity through comprehensive CI/CD pipelines and observability tools.

Shopify Tech Stack

Developer Tooling & Open Source Contributions

Messaging and Communication Between Services

People still saying “Rails cannot scale, and it’s too slow”

Ruby on Rails and React still crushing it at this level is wild!

Thanks for the info , very interesting setup

All of this and some how I have to jump through hoops to have custom shipping sizes for each individual item like Woo

Very very nice post! Old stack but sure it is working!! Stick to what is field testet! :D
We do not need a shopify crash!
Wonder how they manage there hosting? :)