How SaaS Architectures Break at Scale — and the Engineering Decisions That Prevent It (opens in new tab)

There's a specific kind of failure that never makes the post-mortem blog post. It's not a dramatic outage. There's no war room, no all-hands, no apology email sent to a hundred thousand users. It's quieter than that. It looks like a product that worked beautifully for thirty clients, suddenly becoming unreliable at sixty. It looks like an engineering team that can no longer ship without breaking something else. It looks like a sales pipeline that stalls because the platform can't pass a secur...