I'm not an editor of a Medium publication, but I've been an editor of other major media. And I'd also urge writers who hope to write for such media to consider how their editors might respond to Medium posts that appear to brag or humblebrag about their successes. (As this post suggests, that's less a question of what you write about than of how you do it or of your tone.) You don't want to turn off editors before you have a chance to work with them.