FinLedger
Tools:Node.js • TypeScript • MongoDB • Redis • Docker
Skills:Backend Engineer • Fullstack Engineer
AS
Anil Singh
How I engineered an ACID-compliant ledger with idempotent transactions and HMAC-signed webhooks
What Made This Hard
Idempotency at scale Financial systems cannot afford duplicate transactions. Ensuring idempotency across thousands of concurrent API requests was critical
How I Built It
Utilized distributed locks with Redis, and wrapped all ledger updates in ACID-compliant cross-document transactions in MongoDB
Tech Stack
Backend: Node.js, TypeScript
Database: MongoDB, Redis
Links
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