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Incident retros

Post-mortems and what we learned.
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  • incident
  • metrics
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All articles // 29 posts · newest first
01 May
INCIDENT

The webhook retry storm from a partner integration

A partner's webhook sender retried aggressively on our 5xx responses, and their retries became the majority of load on the...

Priya Raman May 1 2026 3 min
23 Apr
INCIDENT

Autoscaling flapped for six hours: a capacity postmortem

A scaling policy tuned for a smooth traffic curve met a genuinely spiky workload and oscillated between 8 and 40 pods for six...

Lena Park Apr 23 2026 3 min
16 Apr
INCIDENT

The N+1 query that shipped on a Tuesday

A code review missed an N+1 query hiding behind an ORM helper method. It was invisible until one customer's account, with 40,000...

Arjun Mehta Apr 16 2026 2 min
09 Apr
ALERTING

Clock skew, JWTs, and a wave of 401s

An NTP sync failure on a subset of auth-service hosts drifted their clocks by four minutes, enough to make every token they...

Priya Raman Apr 9 2026 3 min
02 Apr
ALERTING

The canary that never got traffic

A load balancer routing rule silently excluded the canary pool for two releases in a row, so two broken deploys sailed through...

Lena Park Apr 2 2026 3 min
26 Mar
LATENCY

Kafka consumer lag: the backlog that ate our SLO

A single slow consumer group fell behind by six million messages over a weekend, and our end-to-end freshness SLO paid for it...

Priya Raman Mar 26 2026 3 min
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