We sold a plan that didn't work
We launched a 4.90 EUR/month plan. The annual option would have charged 58.80 EUR every month, the plan granted no entitlements, and the worker igno…
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Google dropped two-thirds of our site from its index in a single day. We found the culprit — except it wasn't him
Hi! I want to tell you a story about two weeks we spent figuring out who tanked our site in Google. We found someone, we were pleased with ourselves…
My First Paying Customer Failed 4 Times: Quality Is Not a Final Check
A 0.3-second disagreement between two sources of truth made my first paying customer fail four times. The browser preview stored the project duratio…
Post-Mortem Best Practices That Actually Drive Change
The Post-Mortem Nobody Learns From I've sat through hundreds of post-mortems. Most follow the same pattern: something breaks, someone writes a Googl…
The Day I Broke Production Because of an Icon
I'm a big fan of aviation, and one lesson from aviation safety has always stuck with me: accidents rarely happen because of a single mistake. Instea…
How To Write A Post Mortem Report Without Blame Language
I'll never forget my first post-mortem meeting. I was a junior engineer, and the server had crashed at 3 AM during a holiday sale. The report starte…
The Fire That Reached the Backups: The OVHcloud Strasbourg Data-Centre Fire, 2021
Tales from the Bare Metal — Episode 05 In the early hours of 10 March 2021, a fire began in a power room in Strasbourg. By morning an entire data ce…
I Vibe-Coded a Stock Screener Into Production. Then My 2GB Server OOMed and Google De-Indexed Me.
Series intro. I'm a non-CS solo dev who built and shipped a production stock screener almost entirely by "vibe coding" with an AI agent. The site wo…
My agent could see the dropdown. It just couldn't pick anything.
The agent had a list. I asked it to pick an item. It refused. Element not found Refresh. Same. So I opened DevTools and pasted in: document . queryS…
Баги, которые нас воспитали: инженерные истории с Go Loto
Каждый разработчик помнит тот самый момент, когда система, которая только что работала идеально, вдруг начинает вести себя так, будто сошла с ума. К…
Postmortem: A Vercel Edge Function Timeout Caused Our Global API to Fail for 30 Minutes
Postmortem: A Vercel Edge Function Timeout Caused Our Global API to Fail for 30 Minutes On October 17, 2024, at 14:22 UTC, our global API experience…
Postmortem: How a Corrupted Node Modules Folder Caused 3-Hour Outage for Our CI Pipeline
Postmortem: How a Corrupted Node Modules Folder Caused 3-Hour Outage for Our CI Pipeline Published: October 26, 2024 | Author: DevOps Team | 5 min r…
Postmortem: AI Incident Classifier Failed Due to Biased Training Data and Scikit-Learn 1.5
In Q3 2024, a production AI incident classifier mislabeled 42% of critical security incidents as 'low priority' over 72 hours, causing $2.1M in SLA…
Postmortem: A Corrupted Loki 2.10 Log Store Caused 3 Days of Lost Debug Data
Postmortem: A Corrupted Loki 2.10 Log Store Caused 3 Days of Lost Debug Data Overview On October 12, 2024, at 09:15 UTC, our observability team dete…
Postmortem: How a LangGraph 0.1 Multi-Agent Bug Broke Our 2026 Customer Support Bot
Postmortem: How a LangGraph 0.1 Multi-Agent Bug Broke Our 2026 Customer Support Bot Executive Summary On October 12, 2026, our production customer s…
The Postmortem of a 20-Minute Kafka 3.8 Outage That Delayed 1M Order Messages
On October 12, 2024, a misconfigured Kafka 3.8 broker idempotent write setting caused a 20-minute total outage that delayed 1,047,892 order messages…