I'm thinking of engineering my social interactions to have a better effect.
What are you trying to achieve by doing that?
I want to be successful in my job interviews.
I understand wanting to get hired, but pretending to be someone you're not just to get a job is not something you should do. When people eventually find out you only pretended to be someone for your own personal benefit, they will think you're a bad person and want to have nothing to do with you. Just be yourself!
If I don't engineer my personality, I won't get a job.
I still think that you should be as honest with yourself as possible. It is not okay to pretend something that you're not.