A real-time collaboration layer for Atlassian's notification infrastructure.
50M+daily messages
60%latency reduction
99.9%delivery rate
Problem
Atlassian’s notification system was built on a synchronous request-response model that couldn’t scale with the growing user base. Delivery latency spiked during peak hours, and the lack of real-time capabilities meant users often refreshed pages to see updates.
Outcomes
Solstice introduced an event-driven architecture using Apache Kafka for message brokering and WebSockets for real-time delivery. The migration reduced P99 notification delivery latency by 60% and achieved a 99.9% delivery rate across all channels (in-app, email, push).
