# John Trivelli

Product designer at Duolingo.

Designed gamified features like Leaderboards, Achievements, XP Boost, Streak Society, Friends Quest and more!

Sep 16[Nico Sacheri](https://blog.duolingo.com/author/nico/)

[**Chegou a missão dos amigos, um jeito divertido de aprender em dupla!**](https://blog.duolingo.com/missao-dos-amigos/)

Sep 16[Nico Sacheri](https://blog.duolingo.com/author/nico/)

[**Wir stellen vor: Freundesmissionen – gemeinsam lernen auf unterhaltsame Art!**](https://blog.duolingo.com/freundesmissionen/)

Sep 15[Nico Sacheri](https://blog.duolingo.com/author/nico/)

[**Conoce los Desafíos entre amigos, una nueva y divertida forma de aprender en equipo.**](https://blog.duolingo.com/desafios-entre-amigos/)

Sep 9[Courtney Leung](https://blog.duolingo.com/author/courtney/)

[**Introducing Friends Quests, a fun way to team up and learn!**](https://blog.duolingo.com/friends-quests/)