Traffic 101: Packets Mostly Flow
Slack handles billions of inbound network requests per day, all of which traverse through our edge network and ingress load balancing tiers.…
Slack’s Migration to a Cellular Architecture
Summary
In recent years, cellular architectures have become increasingly popular for large online services as a way to increase redundancy and limit …
Service Delivery Index: A Driver for Reliability
How a simple metric drives a reliability culture across the Slack engineering organization
Real-time Messaging
Did you know that ground stations transmit signals to satellites 22,236 miles above the equator in geostationary orbits, and that those signals are th…
Tracing Notifications
Notifications are a key aspect of the Slack user experience. Users rely on timely notifications of mentions and DMs to keep on top of important inform…
Technology Lifecycle
Managing Expectations for Infrastructure Projects
Hakana: Taking Hack Seriously
TL; DR: We’re announcing a new open source type checker for Hack, called Hakana.
Slack launched in 2014, built with a lot of love and also a lo…