See if you can work with them to plan your code before you guys write it. And afterwards, if you can do a code review for each other. This is hard in startups b

See if you can work with them to plan your code before you guys write it. And afterwards, if you can do a code review for each other. This is hard in startups but it can avoid a lot of bugs downstream; cuz I'm guessing you don't really have any QA either.