{
  "id": "skill-area:backend-data-persistence",
  "_kind": "SkillArea",
  "_file": "domain/skill-areas/skill-areas-technical-depth.yaml",
  "_cluster": "domain",
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    "displayName": "Backend Data Persistence",
    "description": "Selecting and integrating data stores — relational (PostgreSQL, MySQL),\ndocument (MongoDB), key-value (Redis), and search (Elasticsearch) —\nwith backend services. Covers connection pooling, migration strategies,\nquery optimization, and multi-store architectures.\n",
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    ],
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      "expert"
    ]
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