Senior developers normally have about 10 years of actual work experience. This is normally a long mix of managing program deliverables, other engineers, master

Senior developers normally have about 10 years of actual work experience. This is normally a long mix of managing program deliverables, other engineers, mastery of documentation for all aspects of the program or programs and the big one is understanding the big picture and asking why, what, when, where and how for engineering, management and personnel decisions goals for the success of programs(these guys generate a ton of profit just by keeping things on task and focused to achieve the goals of the program(s)).