Hi Augusta I. Great question! There are a number of different occupations that try to find flaws. In general they are called quality assurance, or quality control positions. When I worked for Microsoft, I wrote code to test the Windows 7 operating system to find software flaws called "bugs". The code was necessary to automate testing because during the development phase, the Windows program would change on a regular basis and testing everything by hand would be impossible across all the different languages and computer configurations.
Anyway, there are certainly whole industries that look for flaws in all kinds of products and services. In the internet realm, these are typically seen through a security lens. You can imagine how important finding flaws would be for a company like Facebook, or a big bank thats processing your checks online! On the other hand, if you working for a traditional product company like Ford or Tesla, you would be working through a quality control lens to make sure that the products getting shipped to customers meet the quality specifications for each model
Either way, both of these positions are in demand, and with the right degree and experience, you could land yourself a very well paying job. Have a look online at those different keywords for jobs that might interest you. Let me know if you have follow up questions and good luck!