I worked a place like this. These kinds of job descriptions betray unrealistic expectations from management. In all likelihood what you'll find there is an undo

I worked a place like this. These kinds of job descriptions betray unrealistic expectations from management. In all likelihood what you'll find there is an undocumented clusterfuck of a codebase with some serious design flaws. Limited or non-existent access to your predecessor for questions about where key elements like passwords, etc. are located. And by the time the 2 months it takes to get your mind around it (if you're really good) expires, they'll be ready to fire you for not meeting productivity expectations.