Developer D · Backend
Database and API: data modelling, SQL, indexes and transactions, plus API design, auth, validation, errors, versioning and operations.
Verified level
DFundamentalLow confidence
Reviewed 2 months ago by Developer B.
Self assessment
DFundamental
At or below the verified level.
Target
DC
1 level(s) to go.
Checklist
0/29
Nothing flagged.
Assigned to reach C by 13 Oct 2026 — Focus on tables, keys and relationships first.
Learning log (1)
- NoteForeign key cascade29 Sept 2026
ON DELETE CASCADE removes children automatically — convenient, but easy to lose data with.