https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Sat, 16 May 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-05-16-modern-kotlin-2026-kotlin-2-1-k2-compose-multiplatform-ktor-3-spring-boot-arrow-exposed-deep-dive.en https://www.youngju.dev/blog/culture/2026-05-16-modern-kotlin-2026-kotlin-2-1-k2-compose-multiplatform-ktor-3-spring-boot-arrow-exposed-deep-dive.en Kotlin 2.1 (Nov 2024) made the K2 compiler the default, and 2.2 (Mar 2025) shipped context parameters. In the same window Compose Multiplatform 1.7 declared iOS stable, Ktor 3 added a WebAssembly target, and Spring Boot treats Kotlin as first-class. This guide pulls the whole 2026 Kotlin stack together — language, compiler, UI, server, concurrency, static analysis, DI/FP/ORM/testing, build, and real company adoption — in one read. Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) kotlinkotlin-2-1k2-compilercompose-multiplatformkmpkotlin-multiplatformktorspring-bootkotlinx-coroutinesflowdetektkonsistkoinarrowexposedkotestmockk2026deep-diveenglish https://www.youngju.dev/blog/culture/2026-05-16-modern-kotlin-2026-kotlin-2-1-k2-compose-multiplatform-ktor-3-spring-boot-arrow-exposed-deep-dive.ja https://www.youngju.dev/blog/culture/2026-05-16-modern-kotlin-2026-kotlin-2-1-k2-compose-multiplatform-ktor-3-spring-boot-arrow-exposed-deep-dive.ja Kotlin は 2024 年 11 月の 2.1 で K2 コンパイラをデフォルトに昇格させ、2025 年 3 月の 2.2 で context parameters を正式導入した。同じ時期に Compose Multiplatform 1.7 は iOS を stable と宣言し、Ktor 3 は WebAssembly ターゲットを追加し、Spring Boot は Kotlin を一級言語として扱う。本稿は 2026 年の Kotlin スタックを一気に整理する — 言語・コンパイラ・UI・サーバ・並行処理・静的解析・DI/FP/ORM/テスト・ビルド・国内外の採用事例まで。 Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) kotlinkotlin-2-1k2-compilercompose-multiplatformkmpkotlin-multiplatformktorspring-bootkotlinx-coroutinesflowdetektkonsistkoinarrowexposedkotestmockk2026deep-dive日本語 https://www.youngju.dev/blog/culture/2026-05-16-modern-kotlin-2026-kotlin-2-1-k2-compose-multiplatform-ktor-3-spring-boot-arrow-exposed-deep-dive https://www.youngju.dev/blog/culture/2026-05-16-modern-kotlin-2026-kotlin-2-1-k2-compose-multiplatform-ktor-3-spring-boot-arrow-exposed-deep-dive Kotlin은 2024년 11월 2.1을 통해 K2 컴파일러를 기본으로 올렸고, 2025년 3월 2.2에서 context parameters를 도입했다. 같은 시기 Compose Multiplatform 1.7은 iOS를 stable로 선언했고, Ktor 3은 WebAssembly 타겟을 추가했고, Spring Boot는 Kotlin을 1급으로 대접한다. 이 글은 2026년의 Kotlin을 한 호흡으로 정리한다 — 언어·컴파일러·UI·서버·동시성·정적 분석·DI/FP/ORM/테스트·빌드·국내외 케이스까지. Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) kotlinkotlin-2-1k2-compilercompose-multiplatformkmpkotlin-multiplatformktorspring-bootkotlinx-coroutinesflowdetektkonsistkoinarrowexposedkotestmockk2026deep-dive