Phase 05Checkpoint: Backend Engineer281 of 434
Writing up the decisions, not the features
Nobody wants a list of endpoints. They want to know why the data is shaped like that and what you would change.
Concept15 minAI implements
Three decisions, each in a short paragraph: what you chose, what you rejected, and what would have to be true for the rejected option to win. That last clause is what separates an engineer from someone repeating a preference, and it is the thing an interviewer will pick up on.
Include a failure. The index you added after the endpoint got slow, the double-charge you found while testing retries, the CORS afternoon. Concrete failures with a mechanism are far more convincing than a feature list, and they are the part of a write-up that anyone actually reads to the end.
You should now be able to
- Write a decision record for a real choice you made
- Describe a failure honestly and what it taught you
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