it sounds like the rotors have an uneven spot - it could be a warp or it could be that the car sat for a while and the rotors rusted everywhere except for where the pads were sitting, that one spot remained clean and the rust never fully came off when the car was driven again, resulting in an uneven braking each time the pads encounter the change in surface
take off each wheel and inspect the rotors (both sides, as much as you can because the dust shield is in the way) for an even, shiny surface all of the way around, or if there is rust, or noticeably different color on the pad contact surface indicating the cause of the uneven braking
another possibility, less likely with OEM parts but more likely if aftermarket parts were used, is an improperly bedded rotor (when new pads meet new rotors we are supposed to treat them gently for the first 100 miles or so, until some of the pad material has transferred to the rotor face, "bedding" them)
All of the above can cause uneven braking.
Sometimes having the rotors turned (local auto parts store) will return to normal feeling, but sometimes it will come back, so often the thing to do is simply replace the rotors on that axle. Whenever replacing rotors it is wise to also replace pads (as they tend to "mate")
while you are there, also confirm the pads are equal thickness on both sides of the caliper (a sticking caliper will make one side wear quickly and the other side remain thick), if you find that either rebuild or replace both calipers on that axle to eliminate the sticking/uneven wear