The LinkedIn-style professional networking platform enables users to create detailed profiles, build connections, share posts, join groups, send messages, and explore job opportunities. It also supports company pages, job listings, notifications, and privacy controls.

In this LLD interview case study, your focus will be on:

• Modeling users, connections, companies, jobs, posts, and messages.
• Designing workflows for connections, content sharing, job applications, and notifications.
• Ensuring scalability, consistency, and privacy in a professional networking context.

By the end of this interview, you will be able to design a scalable professional networking system, communicate trade-offs in modeling social graphs and interactions, and demonstrate clear application of object-oriented principles, design patterns, and class relationships in a structured manner.