October 7, 2025 11 min read @Sam Bailey Deploy Safety: Reducing customer impact from change It’s mid 2023 and we’ve identified some opportunities to improve our reliability. Fast forward to January 2025.…
January 18, 2024 15 min read @Sean McIlroy The Scary Thing About Automating Deploys Most of Slack runs on a monolithic service simply called “The Webapp”. It’s big – hundreds of developers…
February 18, 2022 14 min read @Carlos Valdez@Frank Chen Balancing Safety and Velocity in CI/CD at Slack In 2021, we changed developer testing workflows for Webapp, Slack’s main monorepo, from predominantly testing…
March 29, 2020 7 min read @Michael Deng@Jonathan Chang Deploys at Slack Deploys require a careful balance of speed and reliability. At Slack, we value quick iteration, fast feedback…