OneSignal

Tech stack includes Go, Rust, Ruby on Rails, Kafka, Postgres, Redis, InfluxDB, Typescript, React OneSignal is building the best platform for businesses to intelligently engage with customers across every channel. We provide a simple interface to push notifications, email, and in-app messages, letting content creators focus on quality user engagement instead of complex implementation. We're hiring Senior Software Engineers across multiple teams. More information and apply at https://onesignal.com/careers