> Is it ok to reject a job because I don’t like their software? Definitely yes. Orgs using outdated/user hostile/plain bad software is a definite red flag when

> Is it ok to reject a job because I don’t like their software? Definitely yes. Orgs using outdated/user hostile/plain bad software is a definite red flag when judging fit. > Is it ok to send feedback that I don’t really want to work with that software? What purpose would it serve? Either the person has influence over it or they don't. And either they want to change it to something better or they don't. But even if it's yes to both, unless they are a tiny company they are going to be stuck with it for the foreseeable, if only because of organisational inertia.