Interviewing is a skill that needs to be worked on. Unfortunately, your "portfolio" is not portable between companies and so these tedious interviews are neces

Interviewing is a skill that needs to be worked on. Unfortunately, your "portfolio" is not portable between companies and so these tedious interviews are necessary. Similarly for other technical roles like welding - they expect you to do an example weld to show you can really do the work, though there are also certification standards that help which we don't have in the software industry.