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Discover what’s going on in the Kotlin ecosystem | @JetBrains Video tutorials http://kotl.in/video News http://kotl.in/news Community discussions http://kotl.in/slack

🟢 Using Spring Boot with Kotlin results in less boilerplate and more clarity. With data classes and @​ConfigurationProperties, you get concise, immutable, and type-safe configuration objects that are easy to maintain. Get started with the official documentation 👇…


’Tis the season to code in Kotlin – and today is our final Advent of Code 2025 livestream! Join @sebi_io and Olaf Gottschalk as they solve the Day 5 puzzle live, compare strategies, and wrap up our festive Kotlin streaming week. Don’t miss the finale 🎉 youtube.com/live/VkWxVHwkO…

kotlin's tweet card. Advent of Code 2025 in Kotlin. Day 5.

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Advent of Code 2025 in Kotlin. Day 5.


What does it look like when you take ✨ Kotlin Notebooks ✨ and solve #AdventOfCode Day 3? Well, it looks like this! @volebamor created this viz live on our stream that just finished. 🎨 Nothing even comes close to @Kotlin Notebooks when doing this stuff.



🎉 Join the Kotlin Ecosystem Reddit AMA! 🗓️ Dec 11, 3:00–7:00 pm CET 💬 r/Kotlin Chat with the Kotlin Ecosystem team about language updates, Kotlin Multiplatform, AI tooling, backend development, and more. reddit.com/r/Kotlin/comme…


Quarkus + LangChain4j + Kotlin = enterprise-ready AI assistants. Max Andersen and Konstantin Pavlov presented a talk at KotlinConf on building retrieval-augmented chatbots using Kotlin. Their demonstration included integrating large language models (LLMs) with Quarkus and…


🔴 LIVE: The KMP Career Debate with mobile industry experts We are kicking off the finale with the "Reality Check" game 🎰 Are we all becoming "Mobile Engineers"? Is Multiplatform the new default? Join the discussion and ask your questions live: youtube.com/watch?v=B9-yWX…

kotlin's tweet card. How Android devs can advance their career with KMP

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How Android devs can advance their career with KMP


It’s Day 3 of Advent of Code 2025, and the puzzles are getting trickier. Join @sebi_io and @maiatoday as they take on today’s challenge. Grab a warm drink and tune in to the livestream at 5:30 pm UTC ❄️ youtube.com/live/k6ApXPHIb…

kotlin's tweet card. Advent of Code 2025 in Kotlin. Day 3.

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Advent of Code 2025 in Kotlin. Day 3.


📢 Kotlin 2.3.0-RC2 is out! Here are some of the highlights: ✅ Language: more stable and default features, a new checker for unused return values, and changes to context-sensitive resolution. ✅ Kotlin/JVM: support for Java 25. ✅ Kotlin/Native: improved interop through Swift…

kotlin's tweet image. 📢 Kotlin 2.3.0-RC2 is out! Here are some of the highlights:
✅ Language: more stable and default features, a new checker for unused return values, and changes to context-sensitive resolution.
✅ Kotlin/JVM: support for Java 25.
✅ Kotlin/Native: improved interop through Swift…

Day 2 of Advent of Code 2025 is here! Join @sebi_io and Kotlin educator and illustrator @djleeds as they walk through today’s puzzle. The livestream starts at 5:00 pm UTC – don’t miss it! ⛄ youtube.com/live/IHjrARYGz…

kotlin's tweet card. Advent of Code 2025 in Kotlin. Day 2.

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Advent of Code 2025 in Kotlin. Day 2.


🌱 Getting started with Spring Boot? Check out this "Hello, World!" RESTful web service guide, which now features Kotlin snippets alongside Java code, and choose for yourself which language to pick. spring.io/guides/gs/rest…


It’s the most wonderful time of the year… for coding in Kotlin! Join @sebi_io and @zsmb13 as they unwrap the very first Advent of Code puzzle. Tune in to today’s livestream at 5:00 pm UTC, bring your ideas, and let’s kick off the festive season together! 🎄…

kotlin's tweet card. Advent of Code in Kotlin 2025. Day 1.

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Advent of Code in Kotlin 2025. Day 1.


🔥 The Black Friday special ends soon! Get 20% off KotlinConf 2026 tickets. Deal ends midnight (CET) 🎟️ Grab your tickets now: kotl.in/conf26-blakfr

🎟️ Black Friday special! 🔥 Get 20% off your KotlinConf 2026 ticket and join 2,000+ Kotlin enthusiasts in Munich. Don’t miss out on this limited offer: kotl.in/conf26-blakfr

kotlinconf's tweet image. 🎟️ Black Friday special!

🔥 Get 20% off your KotlinConf 2026 ticket and join 2,000+ Kotlin enthusiasts in Munich.

Don’t miss out on this limited offer: kotl.in/conf26-blakfr


⚡ Amper 0.9.0 is here! ⚡ • First preview of extensibility and plugins • Dependency resolution graph caching • Auto-sync in the IDE (using IntelliJ IDEA 2025.3 Beta) Release notes 👉 kotl.in/amper090-github Blog post 👇 kotl.in/amper090


🧑‍🏫 If you’re teaching Kotlin (or thinking about it), we’ve got you covered! Check out our comprehensive Programming in Kotlin course. Inside, you’ll find lectures, quizzes, tests, projects, and slides with speaker notes. The course focuses on real-world skills and is FREE! Get…


At KotlinConf 2025, the @AndroidStudio team shared how they rebuilt the entire AI chat UI with Compose – making it faster, cleaner, and ready for the next wave of developer tools. 🎥 Watch the full talk here: youtube.com/watch?v=lcqtRQ…


🎄 Join us live for five days of Advent of Code puzzles and five Kotlin livestreams on December 1–5! Solve the puzzles in Kotlin with help from Kotlin team experts and fun community guests, climb the leaderboard, learn new tricks, and have a chance to win some prizes along the…


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