priyanshu-kun said Hey Engineers/Developers,
I want to practice my backend skills and learn how scalable applications are built. So what I'm thinking to do is learn the high-level system design first and try to implement that learning as well.
Suppose I learned how Instagram reels/TikTok works, how they process, and how they scale to millions of users around the globe by trying to build my own scalable app.
Or I can already contribute to established open-source projects, for example, rocketchat.

What should I do?,I had a machine coding round today for backend role but I didn't not show up cause I was nervous as hell. Reason, I failed my last 2 interviews.

Now, I'm conflicted, sad, anxious and somewhat devastated.,Can somebody suggest me backend heavy opensource projects which I can contribute to improve my engineering skills?```