Hi all, I'm very down now. I would be very appreciate if any tips can help me out.

I was graduated from a university that CS ranked Top 30 in the U.S. last year. As a transfered student, I needed to start from basic Java course to many upper-division courses to get a B.S degree. I finished all these courses within two years, so I didn't have time to get an intership. But after graduated, my resume was almost empty except some course work, and no suprise I got several rejections from the job I applied.

Then I spent a year to work on Leetcode problems, OOD and system design inverviews, took courses from Udemy, and finished some projects from it to fill up my resume. And this September applied jobs on Facebook, Microsoft, Google... and still got no interview invitations except one from Amazon, but I surprisingly failed the OA... and that's all.

So I'm very down now, since all works I've done in a whole year didn't make me a good candidate. I'm not sure if any thing wrong in my resume or companies do not like me that gapped one year after graduated from university. So it would be great if any tips can help me out, thank you all!

Skill set: Spring framework, Web development, React-redux, design pattern, database, basic recommender system...