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TechLogStack

We retell real outages from the biggest tech companies in plain English. No jargon walls. Just the story, the fix, and the lesson.

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The 80% Problem: Why Getting an LLM System to 'Works in Demo' Is 20% of the Work
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The 80% Problem: Why Getting an LLM System to 'Works in Demo' Is 20% of the Work

#reliability #shopify #machinelearning #engineering
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14 min read
LinkedIn Needed a Message Queue. They Built the One the Entire Internet Runs On.
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LinkedIn Needed a Message Queue. They Built the One the Entire Internet Runs On.

#messaging #linkedin #apachekafka #distributedsystems
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15 min read
Figma's Database Grew 100x in Four Years — Here's How a Small Team Kept It From Toppling
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Figma's Database Grew 100x in Four Years — Here's How a Small Team Kept It From Toppling

#database #figma #systemdesign #architecture
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12 min read
Datadog Went Dark for 24 Hours and Came Back With a Different Philosophy
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Datadog Went Dark for 24 Hours and Came Back With a Different Philosophy

#reliability #datadog #devops #observability
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13 min read
Uber Had 150,000 Secrets Scattered Across 25 Vaults — So They Built One Platform to Rule Them
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Uber Had 150,000 Secrets Scattered Across 25 Vaults — So They Built One Platform to Rule Them

#security #uber #devops
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14 min read
OpenAI Runs ChatGPT for 800 Million Users on One PostgreSQL Instance — and It Works
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OpenAI Runs ChatGPT for 800 Million Users on One PostgreSQL Instance — and It Works

#database #openai #ai #llm
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13 min read
Netflix Unleashed a Monkey With a Weapon in Its Own Data Center — On Purpose
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Netflix Unleashed a Monkey With a Weapon in Its Own Data Center — On Purpose

#chaosengineering #netflix #cloud #devops
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14 min read
Slack Cut Deploy-Related Customer Impact by 90% in Eighteen Months
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Slack Cut Deploy-Related Customer Impact by 90% in Eighteen Months

#reliability #slack #beginners #tutorial
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11 min read
65 Million Streams: How Netflix Rebuilt Its Guts for Live
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65 Million Streams: How Netflix Rebuilt Its Guts for Live

#livestreaming #netflix #architecture #backend
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14 min read
Slack Rewrote Its Core Architecture for Enterprise — Because the Old One Was a Lie
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Slack Rewrote Its Core Architecture for Enterprise — Because the Old One Was a Lie

#distributedsystems #slack #architecture #engineering
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11 min read
Netflix's Containers Were Fighting Their Own CPUs — and Losing
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Netflix's Containers Were Fighting Their Own CPUs — and Losing

#performance #netflix #devops #backend
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12 min read
Netflix Streamed Live Sports for Millions — and the Hard Part Wasn't the Video
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Netflix Streamed Live Sports for Millions — and the Hard Part Wasn't the Video

#reliability #netflix #architecture #backend
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11 min read
The Test That Broke GitHub: A Failover Drill Goes Live
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The Test That Broke GitHub: A Failover Drill Goes Live

#reliability #github #devops #architecture
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14 min read
When MS Dhoni Got Out: How Hotstar Survived 25 Million Concurrent Users
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When MS Dhoni Got Out: How Hotstar Survived 25 Million Concurrent Users

#livestreaming #hotstar #scalability #systemdesign
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13 min read
Stripe Converted 3.7 Million Lines of JavaScript in One Pull Request on a Sunday
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Stripe Converted 3.7 Million Lines of JavaScript in One Pull Request on a Sunday

#performance #stripe #javascript #engineering
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11 min read
Cloudflare's Datacenter Partner Failed and the Control Plane Went Dark for 40 Hours
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Cloudflare's Datacenter Partner Failed and the Control Plane Went Dark for 40 Hours

#reliability #cloudflare #devops #architecture
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11 min read
How a Two-Line Script Silently Deleted 883 Customer Cloud Sites
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How a Two-Line Script Silently Deleted 883 Customer Cloud Sites

#reliability #atlassian #beginners #tutorial
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12 min read
Shopify's Engineers Hunted Deadlocks at 19 Million Queries per Second
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Shopify's Engineers Hunted Deadlocks at 19 Million Queries per Second

#database #shopify #engineer #performance
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11 min read
Slack's Worst Day: When a Better Cache Manager Made Everything Worse
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Slack's Worst Day: When a Better Cache Manager Made Everything Worse

#reliability #slack #caching #performance
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12 min read
Discord Killed the MacBook Dev Environment and Never Looked Back
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Discord Killed the MacBook Dev Environment and Never Looked Back

#reliability #discord #devrel #engineering
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11 min read
Netflix Made Their Workflow Orchestrator 100x Faster by Rewriting the Engine Nobody Thought Was Slow
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Netflix Made Their Workflow Orchestrator 100x Faster by Rewriting the Engine Nobody Thought Was Slow

#performance #netflix #architecture #devops
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11 min read
How Discord Migrated Trillions of Messages and Fired Their Garbage Collector
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How Discord Migrated Trillions of Messages and Fired Their Garbage Collector

#database #discord #scalability #infrastructure
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13 min read
Netflix Hit the AWS Instance Ceiling and Built a Workflow Engine That Scales Forever
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Netflix Hit the AWS Instance Ceiling and Built a Workflow Engine That Scales Forever

#distributedsystems #netflix #aws #cloud
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11 min read
Shopify Sharded a Rails Database With Vitess and the App Never Knew It Happened
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Shopify Sharded a Rails Database With Vitess and the App Never Knew It Happened

#database #shopify #analytics #backend
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11 min read
A Database Permission Change in ClickHouse Took Down 28% of Cloudflare's HTTP Traffic
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A Database Permission Change in ClickHouse Took Down 28% of Cloudflare's HTTP Traffic

#reliability #cloudflare #devops #database
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11 min read
Cloudflare Fixed a React Security Vulnerability and Broke the Entire Network
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Cloudflare Fixed a React Security Vulnerability and Broke the Entire Network

#reliability #cloudflare #security #react
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11 min read
How Stripe Moves Petabytes Between Database Shards Without Stopping the Money
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How Stripe Moves Petabytes Between Database Shards Without Stopping the Money

#database #stripe #systemdesign #scalability
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12 min read
How GitHub Upgraded 1200 MySQL Hosts Without Dropping a Single Query
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How GitHub Upgraded 1200 MySQL Hosts Without Dropping a Single Query

#database #github #mysql #infrastructure
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13 min read
Slack Built a Big Red Button to Drain an Entire Data Center in Five Minutes
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Slack Built a Big Red Button to Drain an Entire Data Center in Five Minutes

#reliability #slack #datacenter #sre
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12 min read
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