Be likeable or get fired
Some hard lesson's i've realized while working in "professional" environments:1. You must earn respect before you trash the system, no matter how shitty their code is or lack of tests. It's usually best to start by "doing your job"- whether that's issues assigned to you or bug fixes; you are at the bottom of the totem pole right now. Once you're "respected", implementing better solutions will be a lot easier.2. Excuses for why shitty code is in production are probably legitimate excuses; a company that makes profit on a SaaS product needs to launch and iterate quickly. Product managers/sales/marketing do not care about your unit tests. Your users also don't care about your unit tests. Unfortunately this is a dilemma that's hard to swallow, because when things break, it comes back around.You have to realize a team that's been there before you has done things in certain ways for certain reasons- whether that's good or bad, you must adapt to it before you go king kong on their shit.Or you can just start your own company and make your own rules.