How would you approach optimizing the performance of a web application?

During my final year at college, I worked on a web application project for a local non-profit organization. The site was slow to load, which affected user engagement. I began by analyzing the application using tools like Google PageSpeed Insights to identify bottlenecks. I discovered that large image files were significantly slowing down the load time. To address this, I compressed the images and implemented lazy loading, ensuring that images would only load when they were in the viewport. After these changes, the site’s load time improved by over 50%, and we received positive feedback from users about the improved performance.

While volunteering for a community event, I helped manage the event's promotional website. The initial version of the site had a lot of unnecessary scripts and styles that complicated the loading process. I took the initiative to streamline these resources by removing unused CSS and JavaScript files. Additionally, I implemented a content delivery network (CDN) to serve static files more efficiently. As a result, we saw a noticeable improvement in loading speed, which led to higher registrations for the event as users found the site more accessible and easier to navigate.

In my first role as a junior developer at an e-commerce company, I was part of a team tasked with optimizing our main storefront. I conducted load testing and identified that our server response time was lagging during peak hours. I suggested implementing caching strategies for frequently accessed data, which reduced server load and improved response times. Additionally, we optimized the database queries to make them more efficient. These changes resulted in a 30% increase in page views and a noticeable decrease in cart abandonment rates during busy shopping hours.