Hard CS is rarely needed in my projects but there are times that it's unfeasible to make things work without it. My last project involved making calculations,

Hard CS is rarely needed in my projects but there are times that it's unfeasible to make things work without it. My last project involved making calculations, clustering and specific spatial queries over a set of 4D points ( GPS + time ) there is no way to make competitive complex applications if no one in your team understands O-notation, Dynamic Programming, Euristics, Graphs Theory, etcetera.