My standard advice is to use a job title that fits your ability. If you don't, it's going to be a bad fit.
That said, if you're looking for a new job and are still a junior, you're probably switching far too quickly.
My plan was to switch at 3 years experience, at which point I'd drop the junior title for sure. I ended up staying longer (because they increased my pay very well the first 3 years, and then started screwing me over) and my second job was "lead developer", which I still have 11 years later. I'm sure I could get more money if I switched, but I like my job and my company and my coworkers, so it's been hard to find anything I want more, no matter the money.
In short, no, if you switch jobs, you shouldn't call yourself a junior, one way or another.