Industry Leaders on the KotlinConf'25 Stage: What Global Brands Built With Kotlin | The Kotlin Blog

KotlinConf 2025 showcased the growing adoption of Kotlin by leading global brands such as Meta, AWS, Duolingo, Uber, and others, highlighting real-world engineering solutions and best practices. At the event, companies shared insights into using Kotlin to tackle complex engineering challenges, including navigation systems, performance improvements, cross-platform architectures, and large-scale code migrations. AWS discussed scaling their SDK for Kotlin, while Duolingo highlighted Kotlin Multiplatform's role in accelerating their feature delivery. Google Workspace's session focused on deploying Kotlin Multiplatform, and Meta introduced Kotlin support in their Buck2 build system. Additionally, the McDonald's app team shared their navigation solutions using Kotlin Multiplatform, and Uber explained their AI-driven migration from Java to Kotlin. X (formerly Twitter) described their experience with a cross-platform KMP project. The conference served as a platform for engineers to share practical lessons and connect with the global Kotlin community, fostering innovation and collaboration in the Kotlin ecosystem.