Migrating a Healthcare SaaS from AngularJS to Next.js: What 10 Years of Technical Debt Actually Looks Like

A healthcare SaaS platform originally built in 2015 with AngularJS accumulated significant technical debt over 10 years. The project began as a spin-off from a Java Swing medical imaging application, starting with poor code quality and a team lacking web development experience. Despite early efforts to introduce structure and i18n, the platform grew into a complex product serving multiple healthcare clients before facing the need to migrate to Next.js.