LLD System Design Mock Interview

Prepare for Low Level Design (LLD) interviews commonly asked in product companies. In this 1:1 mock interview, we will simulate a real interview environment where you design a system from scratch and explain your design decisions.

We will focus on object-oriented design, class diagrams, API design, and clean architecture principles.

What we will cover

1. Object-Oriented Design principles (SOLID)
2. UML / Class diagram design
3. Design patterns (Factory, Strategy, Observer, etc.)
4. API design and extensibility
5. Writing maintainable and scalable code structure

Example design problems

1. Design a Parking Lot System
2. Design a Rate Limiter
3. Design a Notification System
4. Design a Food Delivery / Ride Sharing module

What you will get

1. Real interview simulation
2. Detailed feedback on your design approach
3. Suggestions to improve scalability and extensibility
4. Tips to structure answers in interviews

Who should book this

Backend / Fullstack engineers with 2–8 years of experience preparing for product company interviews.

Duration

45–60 minutes