How would you approach designing a system to handle a sudden increase in user traffic?

During my final year project in college, I worked on a student portal that was designed to handle academic resources. To prepare for a potential increase in users during exam periods, we implemented a load balancing system using cloud services. We set up multiple servers to distribute the traffic evenly, ensuring that no single server would be overwhelmed. Additionally, we used caching to store frequently accessed resources, which significantly reduced load time. This experience taught me the importance of scalability and user experience, as we wanted to ensure that students could access their materials without frustration. The result was a smoother experience during peak times, and we received positive feedback on the portal's performance.

While volunteering for a local non-profit, I helped design an event management system for a fundraising event. We anticipated a sudden influx of attendees, so we decided to deploy a simple ticketing system that could handle increased demand. I suggested using a cloud-based platform that allowed for auto-scaling, meaning it could automatically adjust resources based on the number of users buying tickets in real-time. We also promoted pre-registration to manage the expected traffic better. This proactive approach resulted in a seamless ticketing experience, and we were able to accommodate twice as many participants compared to previous events, which boosted our fundraising success.

In my first role as a junior developer at an e-commerce company, we prepared for a major product launch that we expected would attract a significant increase in traffic. I collaborated with the senior engineers to implement a content delivery network (CDN) to speed up the delivery of our website content. We also created a plan for horizontal scaling, which allowed us to add more servers as needed. Additionally, we monitored performance metrics closely during the launch to quickly address any issues. As a result, the launch went smoothly, and we were able to handle the increased traffic without downtime, leading to a successful sales week.