Talking Kotlin

In this engaging conversation, Alex Sysoev from JetBrains, who leads the Kotlin XRPC project, dives into the innovative features of the Kotlin XRPC library. He and Sebastian discuss the nuances of implementing Remote Procedure Calls in Kotlin, comparing RPC and REST, and the need for fault-tolerant services. Alex highlights the library's integration with Ktor and existing gRPC definitions, as well as its ambition to enhance interoperability within various environments. They also touch on experimental technology and the collaborative spirit of the Kotlin community.

Sebastian and Márton are joined by Denis Borisevich from RIEDEL Communications, and learn about how Kotlin is used behind-the-scenes to power media, sports, and entertainment broadcasts watched by millions around the globe. Tune in for an exciting story about how Kotlin, Ktor, and Arrow are being used in production for a use case where robust software is mission-critical.Resources: Riedel Communications TornadoFX Unsigned integer types Arrow Ktor EurovisionHosts: Sebastian Aigner – Website | Bluesky Márton Braun – Website | Bluesky Guest: Denis Borisevich – LinkedIn Timeline:(0:00) Introductions(2:42) Events powered by Riedel(3:50) The Kotlin part(6:44) Routing video signals(9:12) Error handling in milliseconds(10:31) The Kotlin part, continued(13:29) TornadoFX!(19:19) On introducing Compose(23:30) Java to Kotlin migration(26:30) Learning Kotlin after C++(28:44) Unsigned ints in Kotlin(32:09) Arrow!(33:00) Server-side Kotlin(36:25) Functional programming(42:10) Why Kotlin over others?(45:55) Kotlin/Java interop(47:12) A 2-week long test suite(51:35) Confidence in Kotlin(53:05) Future plans(56:00) Wrap-up

Rod Johnson, the creator of the Spring Framework and founder of SpringSource, shares his intriguing journey back to the JVM and his experience with Kotlin. He recounts how Spring was born over two decades ago, emphasizing community collaboration in open-source. Rod finds Kotlin's modern features and readability a refreshing change from Java, highlighting its seamless integration with Spring. The discussions touch on Kotlin's evolving type system and its potential future, making it a fascinating listen for anyone in software development.

Sebastian and Márton discuss building KMP libraries with Jay Shortway, the author of RevenueCat’s Kotlin Multiplatform SDK for in-app purchases.Resources: RevenueCat KMP SDK How we built the RevenueCat SDK for Kotlin Multiplatform Hybrid SDK Architecture at RevenueCat ttypic/swift-klib-plugin on GitHub RevenueCat/purchases-kmp on GitHub Consider moving `Instant` and `Clock` to the standard library · Kotlin/kotlinx-datetime RevenueCat openingsHosts: Sebastian Aigner – Website | Bluesky Márton Braun – Website | Bluesky Guest: Joop Korteweg – Twitter Timeline:(0:00) Intro(0:44) What’s RevenueCat(4:00) In-app purchases are hard(7:22) The multiplatform SDK(12:44) The demand for KMP(16:30) Hiring and team structure(18:42) SDKs for any framework(21:27) Building on native SDKs(23:45) Improving iOS linking(24:54) The SDK is on GitHub(26:05) Benefits of building on native(28:18) Designing a common API(33:21) Add-on modules for SDKs(37:30) Instant in the standard library(38:04) Returning results from the API(39:53) API design decisions(44:57) Codegen opportunities(45:48) The best things about KMP(47:07) KMP improvements wishlist(48:28) The KMP journey(49:45) Wrap-up

Sebastian and Pamela discuss what it means to be an expert in Kotlin Multiplatform, with the help of a panel of experts! Learn about why it's interesting to dive deep into a certain technology, recommendations on how to learn advanced topics, and general advice on how to get the most out of using KMP.SKIEKMP libraries: whyoleg/cryptography-kotlinInteresting code to explore: JetBrains/kotlin Kotlin/kotlinx-datetime Kotlin/kotlinx-io Kotlin/kotlinx.coroutines Cartesian product by Jake Get an invite!Ecosystem wishlist: wasmJs support in SQLDelight Compose Multiplatform support in MapLibreLearning resources: Kotlin Multiplatform build setup from scratch with Sebastian Sellmair KEEP - Kotlin Evolution and Enhancement Process HexFormat proposal and discussion Uuid proposal and discussionMore KMP experts: Kevin Galligan Bluesky Twitter Russell Wolf GitHub Twitter multiplatform-settings Jesse Wilson GitHub Sebastian Sellmair Twitter Salomon Brys TwitterHosts: Sebastian Aigner Website Pamela Hill Blog BlueskyGuests: Jake Wharton Website John O'Reilly Website KMP samples on GitHub Konstantin Tskhovrebov Mastodon Tadeas Kriz Mastodon Bluesky(0:00) Introductions(1:40) Why be a KMP expert?(9:14) First steps to being an expert(16:38) Respecting each platform(24:04) Libraries for KMP(27:45) Advanced learning resources(38:18) Ecosystem wishlist(43:03) Exercising your KMP skills(48:15) Shoutouts to other experts(51:34) Wrap-up

Abe White and Marc Prud'hommeaux, co-founders of Skip, share their expertise in bridging the iOS and Android ecosystems. They discuss their innovative transpiler that converts Swift to Kotlin, making multi-platform development seamless. Key challenges, like API integration and serialization across platforms, are examined. The duo emphasizes enhancing developer experience by improving tooling support, especially for those transitioning from Xcode to Android Studio. They also touch on the complexities of state management in modern UI frameworks.

Russell Wolf, based in Boston, is the mastermind behind the multiplatform-settings library and a key figure in the Kotlin Multiplatform community. He discusses his experience at DroidCon New York, highlighting the balance needed between shared code and platform-native features. Topics include designing reusable APIs, the challenges of secure storage, and the intricacies of observable preferences across platforms. Russell also dives into best practices for building effective multiplatform libraries and the evolving landscape of dependency injection in Kotlin development.

Discover the light-hearted journey of personal fitness as the hosts share their workout experiences. Celebrate eight years of camaraderie and transition with humor and gratitude. Dive into Kotlin's evolution post-2.0, focusing on smart casts and overcoming technical debt. Explore community engagement in prioritizing development, the significance of the Kotlin compiler ecosystem, and the benefits of the Kotlin Symbol Processor. Unpack the integration challenges of Compose and strategies for maintaining backward compatibility while enhancing type safety and usability in Kotlin.

In this episode of Talking Kotlin, Hadi Hariri and Sebastian Aigner chat with Raphael Michel, the founder of pretix, an open-source ticketing system. Raphael shares his fascinating journey, from building pretix to solve a conference ticketing problem to becoming a full-fledged company with a global reach. The conversation dives into the complexities of event ticketing, the challenges of the pandemic, and the surprising new markets pretix entered, like managing access for public swimming pools in Berlin. Throughout the episode, Raphael discusses how Kotlin plays a crucial role in pretix's development. He talks about using Kotlin for various components, including Android apps, desktop applications, server-side logic, and even future plans for integrating with hardware like turnstiles.

Join us for an in-depth conversation with Michael Rittmeister and Luca Kellermann, the brains behind Kord, a Kotlin library designed for interacting with the Discord API. In this episode, we dive into the complexities of the Discord API, the importance of WebSockets, and the challenges and strategies in building and maintaining a modularized library. We also explore the future of Kord, including their move towards native support and the ongoing effort to keep up with Discord's evolving features. Whether you're a Kotlin enthusiast or a Discord bot developer, this episode is packed with valuable insights and practical advice. Kord library – https://github.com/kordlib/kord Michael on X – @SchlaumeierTVDE Luca on GitHub – https://github.com/lukellmann