# Secure code review of payment flow for Coinsure

> Manual review of payment and payout code paths before a regulatory audit.

URL: https://freelance.adscaled.media/freelancers/james-oconnor/work/secure-code-review-of-payment-flow-for-coinsure

Manual review of payment and payout code paths before a regulatory audit. A case study by James O'Connor, Penetration Tester & Security Consultant.

## Challenge

Coinsure, an insurance comparison site, was preparing for a regulatory audit and needed assurance that its payment code handled money, secrets and retries safely.

## Solution

I reviewed the payment, refund and payout code paths line by line, focusing on race conditions, idempotency, secret handling and logging, and walked the team through every finding.

[View James O'Connor’s profile](https://freelance.adscaled.media/freelancers/james-oconnor)

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