[JohnnyDouglas]

Start looking for work, but keep your current job if you can stand it. Leave them before your boredom effects your performance and they leave you. You have a great explanation when interviewing at a new place as to why you want to leave your current job.

I once took a job doing server development -- hired by the CEO to sort out all the problems and technical debt surrounding the companies backend.

The VP of Engineering returned from pat leave and ordered me unto front end work while the CEO was on leave. I had no interest in that work and had to learn while doing using their crazy framework that was an absolute mess. I regret not walking 2 weeks into that, but stayed another 5 months resulting in total burnout.

Do you think there was an effort to deceive you? In my case I believe there was (after seeing how the company went about business). Chances are if they lied to you about the job description, they'll lie to you about other things.