Prometrica's full-system sequence diagram orchestrates a seven-step candidate assessment workflow spanning registration, digital consent, personality evaluation, industry selection, timed cognitive modules, completion surveys, and session management. The Candidate Browser communicates synchronously with the Platform API, which persists state to the Database, while the Admin Portal accesses the same API layer to manage assessments and generate PDF reports. This architecture demonstrates separation of concerns between client interactions, business logic, and data persistence, with built-in resume logic for mid-assessment drop-off recovery. Fork this diagram to customize authentication flows, add message queuing for async processing, or integrate additional microservices. The sequence pattern is ideal for documenting complex multi-step user journeys in AWS-hosted SaaS applications.