For professional jobs, the pattern is as follows:
1. Locate professionals at the company you would like to work at.
2. Email them through a friend if that is possible, and if not, cold email them and say you are interested in learning more about XYZ company. Ask if they can grab a coffee or do a quick call.
3. During the coffee, ask them good questions to learn more and if you think you would still be interested, ask them if they have any advice on how to apply.
4. Do their advice, which typically means giving them just your resume and having them insert you in to the HR recruiting process.
Any other strategy is a gigantic waste of time.