I made a small configurable reverse proxy back in 2016 - https://github.com/ianunay/mock-node in an attempt to build my portfolio and to attract recruiters / interviewers. Sure enough in one of the system design interviews the interviewer simply did a architecture / code review of this project and was impressed by it. I like to think that this contributed a lot to the company making an offer. I ended up accepting the offer and my life changed a lot since as I had to move to a different country.