Working as developer supporting and maintaining web applications , over past few years , I have spent maximum time fixing bugs left behind by those came before

Working as developer supporting and maintaining web applications , over past few years , I have spent maximum time fixing bugs left behind by those came before me , and more even debugging to understand functionality and architecture. A significant amount of time unit testing ofcourse and lastly some amount of time adding new features or extending existing features. Ofcourse like many developers out there I do however look forward to truly build code from scratch, like from a whiteboard concept to a MVP at work. No luck there so far, cause I usually end up serving businesses that have due a number of reasons chosen to remain where they were a decade ago!