Senior Product Manager, Growth 

From Duolingo’s posting

... Come and be a product lead within our Growth Pillar. Growth is core to our mission at Duolingo; helping users find and build a habit with language learning is tied to our ability to make the product fun and engaging every single day. We work on a wide variety of features that build and strengthen habits, like streaks, quests, leaderboards, notifications, and are always inventing new features to address user needs. You’ll own product strategy and execution across a broad set of opportunities to improve our user retention, with an eye towards DAUs as our north star.