I audited 12 startup stacks in 90 days. Here is...

The thing that breaks before 1,000 users is almost never the code. Not a race condition. Not a memory leak. Not a missing index. Founders assume their app will collapse because of a bug they could have caught in PR review. Engineers assume they'll get paged for a logic error at 2am. Neither is true. In twelve startup audits, the first failure was always an infrastructure primitive. A limit someone didn't know existed. An environment that didn't exist at all. A default that worked perfectly at 50