Blogsby GlyphJul 14
Shipyard: How We Built Slack鈥檚 Next-Generation EC2 Platform
Over the past few years, we鈥檝e been on a journey to modernise how we run Amazon Elastic Compute Cloud (EC2) instances at Slack.
Slack Engineering the engineering blog of Slack: latest posts and feed
Slack 路 Engineering blog 路 < 1 a month 路 8 posts since Dec 1, 2025 路 Quiet
Jun 11
Agentic Testing: Where Agents Fit in the E2E Testing Stack
Abstract Agent-driven end-to-end (E2E) tests add a new exploratory layer to testing, but should they replace traditional deterministic tests?
May 28
Slack AI: The Path to Multi-Cloud
In early 2023, Slack faced a foundational challenge: serving Large Language Models (LLMs) at enterprise scale with the security, reliability, and performance our customers expect.
May 5
From SSH to REST: A Security-Driven Modernization of Slack鈥檚 EMR Data Pipelines
Excerpt By 2024, Slack鈥檚 data platform had accumulated 700+ SSH-based operators orchestrating critical data pipelines. We鈥檙e talking daily search indexing that processed terabytes of data, analytics jobs powering business intelligence, the...
Apr 13
Managing context in long-run agentic applications
Excerpt In complex, long-running agentic systems, maintaining alignment and coherent reasoning between agents requires careful design.
Mar 31
From Custom to Open: Scalable Network Probing and HTTP/3 Readiness with Prometheus
The Problem: Legacy Tooling and Its Limitations Currently, Slack utilizes a hybrid approach to network measurement, incorporating both internal (such as traffic between AWS Availability Zones) and external (monitoring traffic from the...
Mar 19
How Slack Rebuilt Notifications 馃摚
Introduction 馃敂 At Slack, notifications are how teams stay in the loop, but they can also become overwhelming when not designed with intention. Our goal was to make staying informed feel effortless.
Dec 1, 2025
Streamlining Security Investigations with Agents
Slack鈥檚 Security Engineering team is responsible for protecting Slack鈥檚 core infrastructure and services. Our security event ingestion pipeline handles billions of events per day from a diverse array of data sources.
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How Slack is built: reliability, data, frontend and developer productivity.
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Official checkSep 25
not reviewed to official: slack.engineering, linked from slack.com