Reddit Experience · Feb 2026

Ested SonarQube, Semgrep, and Checkmarx on our payment service. none caught the database race condition that caused duplicate charges.

23 replies

Interview Experience

we run a SaaS platform with about 40k users. payment processing is handled by a Node.js microservice running 3 instances behind a load balancer, using Stripe webhooks and Postgres. last month we had 7

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Strings Stack Queue Sql System Design Ml Os