You know what, to some extent its a numbers game. The reasons you didn't get this job could be many. They could have felt intimated by your level of competence

You know what, to some extent its a numbers game. The reasons you didn't get this job could be many. They could have felt intimated by your level of competence, someone decided they don't like you, etc. The main thing is to take what you can from each company and learn from it. There are some companies that doing 3 technical interviews and weeks of interviewing are worth it (I'm thinking of Google, Apple, Microsoft, etc.) If it is a start up or a small company and they make you jump through these hoops you got to decide if its worth it. Build your pipeline. You should try to line up at least two interviews a week at different companies (at a minimum). When you do this, you will feel more confident and it will show in the interview. Never stop looking until you have an offer. So this means, focus on setting up interviews even if you have ones coming up. Realistically speaking, if you get to your forth company and you don't get an offer, its likely there is something wrong with your approach, your interview skills, the jobs you are applying to, etc. My rule of thumb when I am looking is that if I don't have an offer by the third company I have interviewed with, I totally need to focus on what I am doing wrong. It could be just a streak of bad luck, but somethings off in my approach. Lastly, like I said, its a numbers game, you win this by having a lot of companies to interview with.