I like the Wikipedia suggestion most of the time: assume good faith. He works with Starbucks at his day job. He decided to do a hack using an API he was exposed to there. This is not exactly nefarious, even to the severely-damaged-evil-meter version of nefarious which includes "intentionally and with forethought committing the sin of marketing."
I have often used work technologies/clients at play and play technologies at work.
I have often used work technologies/clients at play and play technologies at work.