We at Preply heavily rely on Hashicorp Vault to manage sensitive data…
A/B testing is an essential tool for improving the product. Here at Preply, we launch hundreds of…
This fall Preply had a big release — we launched a new student homepage and new exercises for homework. I’d like to tell you about the Speaking module, which is an exercise that emulates conversation between two people: listening to a speaker (playing audio…
This article describes a few cases where a migration might look good, but it can cause downtime…
