How I Learned to Stop Worrying and Love the Job Hunt
&gt; Know complexity and scalability: Every time I had to code something, I was asked about the time and space complexity as well as whether I can simply make it more efficient. Now and then, I was also asked what would happen if the input became gigantic so it wouldn&#x27;t work on a single machine anymore. It&#x27;s crucial to have answers here.<p>I was interviewed by a startup a few years ago (not naming names as they might be lurking HN) and they asked me exactly this kind of question: can you build scalable systems, what&#x27;s your experience with tons of people hitting your API, and so on and so forth. I was thinking to myself &quot;holy shit they must really be blowing up&quot; only to find out 15 minutes later in the conversation that their API was being hit like 200 times a month.