{
  "unit": "jobs",
  "snapshot": "2026-09-22",
  "query": "queries/population.json · queries/mapping.json",
  "all_count": 218,
  "note": "Meta postings posted in the last 180 days with an AI title (queries/mapping.json), open on the day. family: exclusive, first match in order. direction: title or description names it; rows overlap. A role posted in several cities counts once per city.",
  "rows": [
    {
      "set": "family",
      "group": "research-scientist",
      "label": "Research scientist",
      "count": 38,
      "share": 0.1743
    },
    {
      "set": "family",
      "group": "research-engineer",
      "label": "Research engineer",
      "count": 14,
      "share": 0.0642
    },
    {
      "set": "family",
      "group": "ml-software-engineer",
      "label": "Machine learning or software engineer",
      "count": 107,
      "share": 0.4908
    },
    {
      "set": "family",
      "group": "data",
      "label": "Data",
      "count": 9,
      "share": 0.0413
    },
    {
      "set": "family",
      "group": "product-program",
      "label": "Product, program, and design",
      "count": 14,
      "share": 0.0642
    },
    {
      "set": "family",
      "group": "other",
      "label": "Other titles",
      "count": 36,
      "share": 0.1651
    },
    {
      "set": "direction",
      "group": "foundation-models",
      "label": "Foundation models and LLMs",
      "count": 78,
      "share": 0.3578
    },
    {
      "set": "direction",
      "group": "post-training",
      "label": "Post-training and alignment",
      "count": 32,
      "share": 0.1468
    },
    {
      "set": "direction",
      "group": "multimodal-perception",
      "label": "Multimodal and perception",
      "count": 27,
      "share": 0.1239
    },
    {
      "set": "direction",
      "group": "ai-infrastructure",
      "label": "AI infrastructure",
      "count": 76,
      "share": 0.3486
    },
    {
      "set": "direction",
      "group": "agents",
      "label": "Agents",
      "count": 38,
      "share": 0.1743
    },
    {
      "set": "direction",
      "group": "ranking-recommendations",
      "label": "Ranking and recommendations",
      "count": 101,
      "share": 0.4633
    },
    {
      "set": "direction",
      "group": "ar-vr-devices",
      "label": "AR, VR, and devices",
      "count": 14,
      "share": 0.0642
    },
    {
      "set": "direction",
      "group": "safety-evaluation",
      "label": "Safety and evaluation",
      "count": 9,
      "share": 0.0413
    }
  ]
}