What are the key considerations you would take into account when designing a scalable architecture for a web application?

During my final year at university, I worked on a group project to design a student portal for our college. We started by identifying the key features like course registration, grades viewing, and event announcements. We chose a modular approach, allowing each feature to be developed independently. To ensure scalability, we discussed using cloud services to handle spikes in traffic during registration periods. We implemented a simple load balancer to distribute user requests evenly. By the end of the project, our portal could handle multiple users simultaneously without crashing, which was a significant learning experience for all of us.

While volunteering for a local non-profit, I helped organize a community event that aimed to gather donations and support for families in need. We anticipated a large turnout, which led us to consider how to manage the registration process. Instead of a single sign-up sheet, we created a digital form that could accommodate increasing entries. We also set up a backup system to ensure that if our primary method failed, we could still capture participant information. This experience taught me the importance of planning for scalability in any project, whether it's a web application or an event.

In my first job as a junior developer at an e-commerce startup, I was involved in improving our website’s architecture. We faced issues during holiday sales when traffic surged unexpectedly. I suggested a review of our database queries, which helped identify bottlenecks. We also explored using a content delivery network (CDN) to enhance load times. My contribution helped the team understand the importance of scalable design, and we successfully managed a 40% increase in traffic during the next holiday season without any downtime.