This may be a more appropriate source, from the source:
https://labs.spotify.com/2019/11/12/spotifys-event-delivery-...
https://labs.spotify.com/2019/11/12/spotifys-event-delivery-...
Not sure if a better title is warranted ("How Spotify ran its massive Google Dataflow job for Wrapped 2019", "How Spotify ran one of the largest Google Dataflow jobs ever for Wrapped 2019"?).
I always tell startups not to use superlatives on HN. Modest language sounds stronger.