I work on big insurance java project (initiated before 2003, 300 people in development, now more than 450 people). This is not a lot of little independent proje

I work on big insurance java project (initiated before 2003, 300 people in development, now more than 450 people). This is not a lot of little independent projects - it's ONE Project with more than 75 components! It's high quality software and we make crazy amount of user stories get every sprint out. Of course, we have errors, RTE's - we are all humans. I worked also for others companies and write PHP and Python/Django for years. Failure has nothing with language or framework or tools - it's always human fail. Sorry for my bad english.