OnlineCity

Chatlio enables us to communicate with customers via slack, right on our websites. Chatlio

Sentry is integrated into both the frontend UI and the backend APIs. Soon C++ too! Sentry

Our platform is based on interconnected services with a custom RPC protocol based on ZeroMQ and inspired by ZeroMQs LPP/MDP protocols. ZeroMQ

Almost all company communication happens in slack, it's the beating heart of OnlineCity. Slack

The most latency sensitive parts are written in C++. Due to our interconnected services architecture, we use either Python or C++ for each service, with the performance critical parts being C++14. C++

All data not yet commited to PostgreSQL, lives in multiple redis instances. We are heavy users of lua in redis to enable custom queue behavior. Redis