# Payment reconciliation service for Paycrest

> A Go service that reconciles millions of payment events a day against bank statements, with zero manual matching.

URL: https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/payment-reconciliation-service-for-paycrest

A Go service that reconciles millions of payment events a day against bank statements, with zero manual matching. A case study by Tomasz Kowalczyk, Backend Engineer (Go & PostgreSQL).

## Challenge

Paycrest, a payments startup, reconciled payouts in spreadsheets. Two analysts spent most of every day matching bank lines to transactions, and month-end close regularly slipped by a week.

## Solution

I designed an event-driven reconciliation service in Go that ingests processor events and bank statements, matches them with deterministic rules and fuzzy fallbacks, and surfaces only real exceptions to a small review queue.

[View Tomasz Kowalczyk’s profile](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk)

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