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Gabriel Barreto

proficientstack

I build Amazon SP-API reconciliation tooling that finds reimbursements and payout gaps sellers never claim.

ACTOR STATS

4 public Actors

8 total users

1 monthly user

>99% runs succeeded

Gabriel Barreto — measurement and reconciliation tooling

I build tools for the accounting side of e-commerce: checking what platforms say against what actually happened.

  • Amazon SP-API: reported a Finances API reconciliation behaviour that Amazon publicly acknowledged (issue #5353 on amzn/selling-partner-api-models).
  • Marketplace integrations: Bling to Shopee / Mercado Livre / TikTok Shop at 12,000-SKU scale; Shopee payout reconciliation per product.
  • Stack: Python, Node.js, TypeScript, Docker, MCP servers.

My Actors are built around one rule: never report something you cannot verify in ten seconds. Where a signal is ambiguous, the output says indeterminate instead of inventing a finding — a tag manager or consent platform can inject tags at runtime, and a scanner that ignores that is wrong about half the serious stores on the web.

Open to integration and data-reconciliation work: gabrielbarreto900@gmail.com

Public Actors