“It remains the mystery at the heart of Boeing Co.’s 737 Max crisis: how a company renowned for meticulous design made seemingly basic software mistakes leading to a pair of deadly crashes. Longtime Boeing engineers say the effort was complicated by a push to outsource work to lower-paid contractors.”

“Increasingly, the iconic American planemaker and its subcontractors have relied on temporary workers making as little as $9 an hour to develop and test software, often from countries lacking a deep background in aerospaceーnotably India.”
https://www.industryweek.com/supply-chain/article/22027840/boeings-737-max-software-outsourced-to-9-an-hour-engineers

Re: Leap Year software

I thought we’d seen the last of this sort of thing in the late 90s when so much software had to be rejiggered to handle 4-digit year values. My own experience with Leap Year calcs lies more than a half-century in the past when I was writing a library of calendar arithmetic subroutines for a then-cutting-edge on-line hospital system using assembly language on a Xerox Data Systems Sigma-series mainframe. My stuff way back then apparently worked better than what present-day Europeans can turn out.