What is on the agenda for Kotlin Dev Day 2025?
- 07 November 2025
A day of vision, craftsmanship and progress
On 27 November 2025, Amsterdam will be all about Kotlin.
Five stages, dozens of sessions and one unifying theme: how the JVM community uses Kotlin to build software that stays future proof, scalable and human centered.
Where previous editions focused on adoption and tooling, this edition shifts toward maturity.
Kotlin is no longer a language that needs to prove its value. It is now an ecosystem where teams build sustainably, learn continuously and innovate with intention.
1. Architecture that grows with your team
Many sessions focus on how teams move beyond framework driven thinking and put domain logic back where it belongs.
In Isolated DDD in Kotlin (with and without Spring), Jerre van Veluw shows how to keep domain logic central, even in complex enterprise environments.
In Clean Architecture for Serverless, Elena van Engelen demonstrates how the same principles apply inside cloud native workflows.
The day ends with Coding at the Speed of Thought, where Oday Maleh dives into the power of clarity, focus and simplicity in code design.
2. Multiplatform as a strategic advantage
The second major theme highlights how teams reuse domain logic across platforms and remove unnecessary boundaries.
In Kotlin Multiplatform + Domain Models = ❤, Nico Krijnen explains how shared domain models become a strategic lever across product teams.
With Building a Modern Multiplatform Application with Compose, Arnaud Giuliani shows how these ideas come together in real world applications.
View the program and get your tickets
The JVM community is coming together again. After an inspiring previous edition, the next Kotlin Dev Day will take place on 27 November 2025.
Click the button on the right for the full program.
3. AI that supports rather than takes over
A striking theme this year is how Kotlin is used to keep AI systems predictable and controllable.
In Supercharge your LLM with Kotlin: MCP in Action, Urs Peter shows how the Model Context Protocol turns chatbots into agents that operate reliably within JVM environments.
In Exploring AI Agents in Kotlin with Kog, Sebastian Aigner demonstrates how Kotlin is evolving into an infrastructure language for intelligent systems.
4. Productivity and language evolution
The final group of sessions focuses on the evolution of the Kotlin language itself.
The JetBrains keynote What’s New in Kotlin opens the day with a look at Kotlin 2.x and ecosystem developments.
This is followed by talks such as Spring Boot with Coroutines and Virtual Threads by Paul Wood and FP and OOP: Best Friends Forever by Erik Costlow. These sessions show how Kotlin’s modern features improve productivity and readability.
The core: maturity and craftsmanship
The program for Kotlin Dev Day 2025 shows that Kotlin has grown into a mature platform.
The community is now focusing less on whether something can be done and more on how it can be done better, in ways that are cleaner, more scalable and more human centered.
At CodeGuild we follow this movement closely, because these are the topics that the JVM engineering community works with every day.
Visit our Kotlin Hub page for more information!
