How do you make sure that you are hiring the right person?

I think, it depends on your requirements and the interviewing process. To make sure that you have an accurate match, your sourcing has to be on point. There are plenty of tools to help you in the curation of a longlist of candidates. For instance, getscout.ai, you need to upload a JD, and the tool will recommend only relevant candidates, gives you contact details and provides a skill overview.