{
  "id": "stack-profile:fintech-payments-platform",
  "_kind": "StackProfile",
  "_file": "domain/stack-profiles/deep-stacks-3.yaml",
  "_cluster": "domain",
  "attributes": {
    "displayName": "Fintech / Payments Platform Stack (Go, PostgreSQL, Redis, Kafka, Vault, gRPC)",
    "description": "A high-reliability payment processing platform built on Go for its\nconcurrency model, low GC pauses, and predictable latency. gRPC (via\ngrpc-js or tonic for polyglot services) provides efficient binary\ncommunication between microservices. PostgreSQL stores ledger entries,\naccounts, and transaction history with serializable isolation for\ndouble-entry bookkeeping. Redis handles rate limiting, idempotency\nkey deduplication, and session caching. HashiCorp Vault manages\nencryption keys, API secrets, and PCI-DSS-compliant secret rotation.\nDocker and Kubernetes orchestrate the deployment. The key tradeoff is\ncorrectness over speed-to-market — financial systems demand extensive\naudit logging, regulatory compliance, and deterministic failure modes\nthat slow development compared to typical web applications.\n",
    "composes": [
      "language:go",
      "library:chi",
      "library:ioredis",
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      "tool:vault",
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      "tool:kubernetes"
    ]
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