‘Rex’: Medium’s Recommender-System as a Microservice [Miles Hinson]

Miles Hinson writes about his experience in developing ‘Rex’, the recommender system for Medium, as a Microservice. He discusses design choices and presents a few numbers such as that 95% of all recommendations are created within less than 1 second.

However, the biggest issue was language choice. Much of Medium runs within a Node.js monolith, including the code that used to power story recommendations. Node, despite its many strengths, it wasn’t the best tool for this particular task.

https://medium.engineering/rex-mediums-go-recommendation-microservice-e077bc9582a