Either/both. Someone who can just code is limited to that range of experience. Someone who can code and knows psych can not just code, but also use their knowledge of psych to shape product design decisions (e.g. Instagram) or even design software to solve problems in the field of psychology (either psychological problems people have or problems psychologists have). You get way more options by having not just one niche.
Do you mean as a founder, an early hire, or both? I don’t really have many start up concepts on hand.
Either/both. Someone who can just code is limited to that range of experience. Someone who can code and knows psych can not just code, but also use their knowledge of psych to shape product design decisions (e.g. Instagram) or even design software to solve problems in the field of psychology (either psychological problems people have or problems psychologists have). You get way more options by having not just one niche.