The phrase "same developer" means that the person or company responsible for creating one thing is also responsible for creating something else.
Sentences with «same developer»
However, there was a spanner in the works: Wizarbox, the very same developers responsible for the terrible console - port of the original Risen. (wolfsgamingblog.com)
In other words, the smartphone, tablet and desktop OS need to become the same operating system, the same developer target and ultimately, the same device.» (inc.com)