8. Scaling & Operations
Incident Response & Postmortems
Respond to incidents safely, communicate impact, recover service and turn failures into engineering improvements.
Lesson overview
During an incident, reduce user impact before hunting for the perfect root cause. Establish ownership, communicate clearly, mitigate safely, verify recovery and capture evidence for a postmortem.
Learning path
Theory → Example → Code → Practice → Quiz → Challenge → Completion
Step 1
Theory
During an incident, reduce user impact before hunting for the perfect root cause. Establish ownership, communicate clearly, mitigate safely, verify recovery and capture evidence for a postmortem.
Step 2
Example
If a release causes elevated errors, stop the rollout or roll back, verify recovery, then investigate the release and add a regression test.
Step 3
Code
text
Detect -> Triage -> Mitigate -> Communicate
-> Recover -> Verify -> Learn
Step 4
Practice
Review your current application and apply Incident Response & Postmortems. Document the current behavior, one production risk, the change you would make, and how you would verify it.
Step 5
Quiz
1. What is the central production concern in "Incident Response & Postmortems"?
Step 6
Challenge
Design a production-ready implementation for Incident Response & Postmortems. Include failure handling, security considerations, observability, testing and a rollback or recovery path where applicable.
Complete every stage
Work through every step in order, then the lesson will be marked complete.
Each chapter and subtopic has its own public URL under /full-stack-to-production.