How would you approach designing a highly available and scalable API for a large e-commerce platform?

During my final year in college, I worked on a group project to design a mock e-commerce platform. We focused on creating a simple API to handle user requests like product searches and orders. To ensure scalability, we decided to use a microservices architecture, breaking down the API into smaller services for products, users, and orders. We used cloud services to simulate load balancing, which allowed us to handle multiple users accessing the API simultaneously. To improve availability, we implemented redundancy by having multiple instances of our services running. This project gave me practical experience in designing an API that could scale and remain available under varying loads.

I volunteered with a local non-profit to help them create an online event registration system. We needed an API that could handle user registrations for events with varying attendance. I suggested implementing a caching layer using Redis to speed up response times for frequent queries, like available slots for events. We also discussed using a load balancer to distribute traffic evenly across our servers during peak registration times. This experience taught me the importance of designing a system that can efficiently manage user traffic while ensuring data integrity and availability, even for a small-scale application.

In my first job as a junior developer on an e-commerce team, I contributed to enhancing our existing API. We recognized that during sales events, our API faced increased traffic, leading to slow response times. I collaborated with the team to implement a more robust caching strategy and optimized our database queries. We also introduced API rate limiting to prevent overload during peak times. This experience reinforced the importance of monitoring and iterating on design to ensure high availability and scalability, aligning with user demands. It was rewarding to see our improvements lead to a smoother shopping experience for our customers.