How would you approach designing a system that can handle a sudden spike in traffic, such as during a flash sale?

During my final year project, I was part of a team that designed an e-commerce website. We anticipated that our platform might experience high traffic during promotional events, similar to a flash sale. To address this, we implemented a load balancing strategy using multiple servers to ensure no single server would be overwhelmed. Additionally, we used caching techniques to store frequently accessed data, which reduced the load on our database. This approach allowed our website to handle a simulated spike in users during testing, maintaining performance and delivering a smooth user experience. Overall, this project taught me the importance of planning for scalability in system design.

I volunteered to organize a charity event that required online ticket sales through our website. We expected a surge in traffic when tickets went live. To prepare, I collaborated with the technical team to ensure that our website could handle the expected spike. We set up a countdown timer for the ticket sale to create urgency and used a simple server architecture that allowed for quick scaling if necessary. Additionally, we utilized social media to create buzz and manage expectations. When the sale began, our system smoothly handled the influx of buyers, and we sold out within minutes, demonstrating the effectiveness of our preparation.

In my first job as a junior developer, I was involved in a product launch for a new app. We anticipated increased traffic due to marketing campaigns. I assisted in optimizing our database queries, which minimized response times. We also employed a content delivery network (CDN) to cache static assets, reducing the load on our servers. During the launch, we monitored the system closely and were able to quickly adjust resources as needed, ensuring that our users had a seamless experience. This experience highlighted the critical need for proactive planning and adaptability in system design.