Managing Focus Transitions in Slack
How we guide keyboard users through our app
How a Jenkins Job Broke our Jenkins UI
Troubleshooting plugin upgrades and debugging Jenkins.
Role Management at Slack
Giving Slack users granular controls with roles
Load Testing with Koi Pond
How Slack models and tests with incredibly large groups of users
Client Tracing: Understanding Mobile and Desktop Application Performance at Scale
A customer writes in and says the dreaded words: “My app is slow”. Here we go…
Performance problems can be a real struggle to track down, especial…
Migrating Millions of Concurrent Websockets to Envoy
Slack has a global customer base, with millions of simultaneously connected users at peak times. Most of the communication between users involves send…
Shadow Jobs
Test pre-release versions of the tools you rely upon through CI.
Slack’s Outage on January 4th 2021
Slack’s Outage on January 4th 2021