Teams using OCaml in their projects
Ahrefs
HQ: Singapore C++, DLang, OCaml... React, JavaScript, Gatsby... Elasticsearch, Logstash, Kibana...
Python 
Front-end 📊 Product/Management
JVM ☁️ DevOps
JavaScript BE 
Golang 🎨 UI/UX Design
📱 Mobile
PHP 
C#/.NET 
Ruby/RoR 🔨 Testing/QA