Sebastien Deleuze
where else to find them
website:https://seb.deleuze.fr
github:sdeleuze
bluesky:seb.deleuze.fr
mastodon:@sdeleuze@mastodon.online
x:sdeleuze
linkedin:deleuze
speakerdeck:sdeleuze
what they talk about
all 12 in the filters
where they keep going back
- I/O7 editions2016–2026
- Devoxx Belgium3 editions2017–2024
- KotlinConf3 editions2017–2023
all 13 in the filters
on a stage with
all 11 in the filters
who talks about the same things
- Juergen Hoeller52 talks
- Rossen Stoyanchev27 talks
- Brian Clozel26 talks
- Moritz Halbritter13 talks
- Stéphane Nicoll41 talks
- Paulien van Alst5 talks
| title | conference | date |
|---|---|---|
| Idiomatic Kotlin applications with Spring Boot 4 | Spring I/O 2026 | 2026-04-13 |
Gradle Kotlin DSL with Java 25 is the default build path, and Spring Boot 4 raises the Kotlin baseline (4.0 → Kotlin 2.2, 4.1 → 2.3, 4.2 → 2.4) while adding… | ||
| Null-safe applications with Spring Boot 4 | Spring I/O 2026 | 2026-04-13 |
Spring Boot 4 and the Spring portfolio adopt JSpecify annotations to make APIs explicitly nullable or non-null, deprecating org.springframework.lang and… | ||
| Null Safety in Spring Applications With JSpecify and NullAway | IntelliJ IDEA Conf 2025 | 2025-06-03 |
JSpecify 1.0 annotations plus NullAway + ErrorProne enforce null-safety at compile time, turning IDE warnings into failing Gradle builds; Kotlin 2.1 natively… | ||
| Next level Kotlin support in Spring Boot 4 | Spring I/O 2025 | 2025-05-22 |
Spring Boot 4 uses Kotlin 2.2 baseline and adds JSpecify null-safety annotations so Kotlin callers get compile-time null errors without extra flags; a new… | ||
| Null Safety in Java with JSpecify and NullAway | Spring I/O 2025 | 2025-05-22 |
Shows a concrete migration: add org.jspecify:jspecify:1.0.0 and enable JSpecify + NullAway (as an Error Prone plugin) to turn nullness warnings into… | ||
| Project Leyden: Improving Java’s Startup Time | Devoxx Belgium 2024 | 2024-10-07 |
Project Leyden claims to cut Java startup time in half today and up to fourfold with future Java by shifting work into an aot cache created from a training… | ||
| Keynote | Spring I/O 2023 | 2023-05-18 |
Conference announces Spring Boot 3.1 GA today and a roadmap to Spring Framework 6.1 / Spring Boot 3.2 with milestone releases; shows concrete optimizations… | ||
| From Spring Native to Spring Boot 3 | Spring I/O 2023 | 2023-05-18 |
Official Spring Boot 3 replaces Spring Native and adds built-in GraalVM native-image support via the native build tools plugin and optional buildpacks; Java 17… | ||
| Scale to Zero with Spring + GraalVM or WebAssembly | KotlinConf 2023 | 2023-04-12 |
Spring Boot 3 compiles Kotlin/JVM apps to a GraalVM native image that starts in milliseconds, uses far less memory and yields tiny container layers; demo shows… | ||
| Introducing Kotlin/Wasm | Wasm I/O 2023 | 2023-03-23 |
Kotlin/Wasm compiles to Wasm directly with a new compiler and targets Wasm GC, Typed Function References, Exception Handling and Stringref, aiming for… | ||
| The State of Kotlin Support in Spring | Jfokus 2021 | 2021-02-09 |
Explains concrete Kotlin support: Gradle Kotlin DSL for builds, full null-safety annotations across Spring APIs, coroutine mapping (suspend→Mono, Flow→Flux)… | ||
| The path towards Spring Boot native applications | Joker 2020 | 2020-11-25 |
Spring GraalVM Native incubator produces native executables from Spring Boot apps using GraalVM native-image and Spring Boot build-image (Cloud Native… | ||
| State of Kotlin Support in Spring | Kotlin 1.4 Online Event | 2020-10-12 |
Spring Boot 2.4 adds kotlinx.serialization JSON support and broad coroutine APIs for WebFlux and MVC where suspend/Flow map to Reactor Mono/Flux, plus… | ||
| Kotlin 1.4 Online Event, Day 4: server-side Kotlin | Kotlin 1.4 Online Event | 2020-10-12 |
Server-side Kotlin is concrete: Spring Boot 2.4 adds Kotlin serialization built into Spring Boot 2.4 and coroutine support across MVC and WebFlux, with GraalVM… | ||
| The Path Towards Spring Boot Native Applications on GraalVM | Oracle Developer Live—Java 2020 | 2020-09-15 |
Progress report on compiling Spring apps to native executables using Spring Boot native images and GraalVM native-image: spring-graal-native 0.8 (requires… | ||
| The Path Towards Spring Boot Native Applications | SpringOne 2020 | 2020-09-01 |
Spring GraalVM Native (spring-native 0.8) compiles Spring Boot 2.4 M2 apps with GraalVM 20.2 into native executables via buildpacks or native-image, producing… | ||
| The State of Kotlin Support in Spring | KotlinConf 2019 | 2019-12-04 |
Overview states Spring Boot 2.2 + Kotlin now ships Immutable @ConfigurationProperties via constructor binding, testing adapters for JUnit 5 and Mockk, a router… | ||
| Running Spring Boot applications as GraalVM native images | Devoxx Belgium 2019 | 2019-11-04 |
Shows a working path to run Spring Boot as GraalVM native images using GraalVM native-image, SDKMAN, and the new Spring Graal Native experimental feature, with… | ||
| Deepdive into Reactive Spring with Coroutines and Kotlin Flow | Devoxx Belgium 2019 | 2019-11-04 |
Argues that Kotlin coroutines give reactive Spring a concise, imperative feel while preserving backpressure and Reactor interoperability; demonstrates Spring… | ||
| Spring Boot with Kotlin, Kofu and Coroutines | Sunny Tech 2019 | 2019-06-27 |
Presents official support for Kotlin Coroutines across Spring (Framework, Boot, Data) and the Kofu Kotlin DSL from the Spring Fu incubator for explicit… | ||
| Keynote | Spring I/O 2019 | 2019-05-16 |
Spring Framework 5.2 targets a GA on July 31, 2019 and delivers concrete pieces: a new merged annotations API and a reactive transaction manager that detects… | ||
| Spring Boot with Kotlin, Kofu and Coroutines | Spring I/O 2019 | 2019-05-16 |
Live coding shows a four-step migration: Java+JPA → idiomatic Kotlin → reactive SQL with R2DBC reactive SQL → WebFlux → coroutines + Flow, and then explicit… | ||
| Spring Boot with Kotlin, Kofu and Coroutines | JAX 2019 | 2019-05-06 |
Live coding shows a Java Spring Boot blog converted step by step to idiomatic Kotlin with coroutines + Flow, replacing blocking JPA with R2DBC with Spring Data… | ||
| Bootiful Kotlin | Spring I/O 2018 | 2018-05-24 |
Live-coding builds a working blog: a Spring Boot 2 + Kotlin web app with Mustache templates, H2 in-memory DB, Spring Data repositories and Kotlin data classes… | ||
| Why Spring Loves Kotlin | SpringOne Platform 2017 | 2017-12-04 |
Spring Framework 5 plus Spring Boot 2 add first‑class Kotlin support and migration tooling to convert a Spring Boot 1.x Java+JS blog into a Spring Boot 2 pure… | ||
| From Spring Boot 1 in Java to Spring Boot 2 in Kotlin | Devoxx Belgium 2017 | 2017-11-06 |
Live-coding shows a Java Spring Boot 1 blog app converted to Kotlin on Spring Boot 2 / Spring Framework 5 using Spring Data Kay, with domain types turned into… | ||
| Why Spring ❤ Kotlin | Devoxx Belgium 2017 | 2017-11-06 |
Shows migrating a Spring Boot 1 Java + JavaScript app to a Spring Boot 2 pure Kotlin app using Spring Framework 5, Reactor and Spring Data with working code on… | ||
| Why Spring Loves Kotlin | KotlinConf 2017 | 2017-11-02 |
Stepwise migration from Spring Boot 1 Java + JavaScript to Spring Boot 2 pure Kotlin shows concrete wins: Kotlin-specific bytecode plugin compiler plugin… | ||
| Functional web applications with Spring and Kotlin | Spring I/O 2017 | 2017-05-18 |
Shows how to convert a Spring Boot 1 Java app into a Kotlin Spring Boot 2 app using WebFlux and the functional router DSL, with concrete tooling: Kotlin… | ||
| Developing a Geospatial Webservice with Kotlin and Spring Boot | Spring I/O 2016 | 2016-05-19 |
Practical demo: a geospatial chat (OpenLayers front end) backed by Kotlin + Spring Boot, Postgres with PostGIS and JSONB metadata indexed for fast lookups… | ||
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