Having been a PostgreSQL user since 7.2 I became more involved in the community around 2012 after moving back to Europe from Australia. In 2014 I co-organized Nordic PGDay in Stockholm as well as PGConf Europe in Madrid where I among other things rewrote the website frontends from scratch. Currently I'm reworking parts of the PostgreSQL Europe conference backend to be more mobile friendly.
I also run the Stockholm PostgreSQL User Group (albeit a low intensity group at the moment) together with Magnus Hagander.