Engineering lead on Google Pay. Grew team from 8 to 30 SWEs, scaled Android app from 350k LOC and 40 contributors to 900k LOC and 113 contributors. Exceeded growth targets to reach 40M MAU in 2018 and 84M in 2019. Pivoted focus to international expansion, and co-led 18 month app rewrite in Flutter in preparation for iOS heavy markets like US (https://developers.googleblog.com/google-pay-picks-flutter-to-drive-its-global-product-development/).