Every junior developer makes the same architectural mistake when launching a new SaaS: They try to build every single microservice from scratch.
They spend 3 days configuring JWT tokens, another 4 days fighting with serverless functions for image manipulation, and a week setting up a custom database structure for logging user events. By the time they hit production, they are burned out, and the project is dead before it even launches.
In 2026, the software engineering landscape has evolved. Your codebase should only contain your core proprietary business logic. Everything else should be offloaded to third-party, highly-optimized APIs.
If you are trying to compete on infrastructure instead of feature delivery, you are losing the race.
The Modern SaaS Reference Architecture
