You may run into a wall there though, depending on the goals of the founders/bosses. If their goal is to deliver a minimum viable product in as little time as p

You may run into a wall there though, depending on the goals of the founders/bosses. If their goal is to deliver a minimum viable product in as little time as possible, it may well be that any plea for code standards and well-written code will be ignored in favour of your colleague's cowboy coding. This is a good time to find about where the company stands on this point, because nothing is more soul draining than working on someone else's unmaintainable code mess. If it is just you versus him (i.e., no colleagues who share your view), then you are in for a tough challenge.