There's no ceiling for developer pay (or at least, you're likely nowhere close to it). Large companies with technical tracks pay 1MM+/year for high-level engineers. Mid-level ("Senior" in title) engineers can easily clear half that.
A few things to note:
* Salaries like that are basically only possible at large public, engineering-driven companies, or finance firms (possibly also high-end consultancies, but I have little knowledge there)
* As you get more senior, a larger and larger percent of your take-home pay will be in the form of stock and bonuses; base salary rises much more slowly
* At the highest levels, you're unlikely to be writing much code. Mostly you'll be leading projects, reviewing technical designs, working with execs, etc.