Under the radar programming

Public Domain, https://commons.wikimedia.org/w/index.php?curid=1183115
Some cool looking spitfires. Not quite under the radar but imagine they were...

Under the radar programming: blending some good quality software development with some "other stuff". The air corridor where all the great software is conceived in large organisations.

Large organisations are usually so swamped with mediocrity that nobody at any management level believes that anything decent can come out of any development team. It is usually futile to ask for air cover while programming/changing a major part of a system.

So take a business deliverable, enrich it with good quality software development (under the radar).