{
  "id": "uc_2026_000131",
  "slug": "nubank-devin-etl-migration",
  "title": "How did Nubank use Devin to migrate a multi-million-line ETL monolith?",
  "answer": "Nubank delegated the migration of its 8-year-old, multi-million-line core ETL monolith to Devin. Cognition reports a 12x efficiency improvement in engineering hours saved and over 20x cost savings.",
  "industry": "financial-services",
  "sub_industry": "Fintech bank (Latin America)",
  "roles": [
    "software-engineering"
  ],
  "function": "it",
  "tasks": [
    "code-migration",
    "refactoring"
  ],
  "agent_pattern": "autonomous-agent",
  "autonomy_level": 2,
  "tools": [
    {
      "name": "Devin",
      "vendor": "Cognition",
      "url": null,
      "affiliate": false
    }
  ],
  "deployment_status": "production",
  "organization": {
    "name": "Nubank",
    "type": "digital bank",
    "named": true
  },
  "outcomes": [
    {
      "metric": "engineering efficiency",
      "value": "12x improvement in engineering hours saved",
      "source_ref": 1,
      "self_reported": true
    },
    {
      "metric": "cost savings",
      "value": "over 20x",
      "source_ref": 1,
      "self_reported": true
    }
  ],
  "sources": [
    {
      "url": "https://devin.ai/customers/nubank",
      "publisher": "Cognition (Devin)",
      "title": "How Nubank refactors millions of lines of code to improve engineering efficiency with Devin",
      "published": null,
      "type": "vendor-customer-story",
      "quote": "engineers were able to delegate Devin to handle their migrations and achieve a 12x efficiency improvement in terms of engineering hours saved, and over 20x cost savings.",
      "independent": false,
      "accessed": "2026-10-17",
      "ref": 1
    }
  ],
  "how_it_works": [
    "Engineers delegate migration sub-tasks to Devin.",
    "Engineers review and merge Devin's changes."
  ],
  "risks_compliance": [
    "Agent-written code requires human review and testing",
    "Vendor-published results; not independently audited"
  ],
  "medtech_relevance": null,
  "notes": [],
  "models": [],
  "integrations": [],
  "related": [],
  "first_seen": "2026-10-17",
  "last_verified": "2026-10-17",
  "sponsored": false,
  "license": "CC BY 4.0 (summary text); quotes and sources belong to their owners",
  "evidence_grade": "B",
  "grade_rationale": "Named organization with a quantified outcome from the vendor or the organization itself (self-reported).",
  "verification": {
    "checked": "2026-10-17",
    "checker": "pipeline.verify (quote match + outcome-number match)",
    "methods": [
      "auto:fetch"
    ],
    "quotes_matched": 1,
    "quotes_total": 1,
    "claims_matched": 2,
    "claims_total": 2,
    "passed": true
  },
  "url": "https://agentcasefile.com/cases/nubank-devin-etl-migration/",
  "industry_label": "Banking & Financial Services",
  "role_labels": [
    "Software Engineering"
  ],
  "vertical": null
}