To be honest (at least in my experience) if you are really worth $X as a developer, you can generally get your current employer to give you $X if you are proactive about it.
Quitting generally has more to do with:
A) "You (the employer) Waited Until The Exit Interview To Ask What’s Wrong"
B) "You (the employee) Waited Until The Exit Interview To Convey What's Wrong"
Leaving my last job, I told them what I wanted 1-2 years before I actually left (for more money, but that wasn't the primary cause). The CEO basically told me in the exit interview if it was about money, he'd give me another 30% to get me to stay (and they had countered with that before, back when I told them what I needed to stay long term).
Money isn't necessarily the cause. Its the lack of willingness to communicate and meet the other person's needs.
Quitting generally has more to do with:
A) "You (the employer) Waited Until The Exit Interview To Ask What’s Wrong"
B) "You (the employee) Waited Until The Exit Interview To Convey What's Wrong"
Leaving my last job, I told them what I wanted 1-2 years before I actually left (for more money, but that wasn't the primary cause). The CEO basically told me in the exit interview if it was about money, he'd give me another 30% to get me to stay (and they had countered with that before, back when I told them what I needed to stay long term).
Money isn't necessarily the cause. Its the lack of willingness to communicate and meet the other person's needs.