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Kitty-Hivens/README.md

Hi there, I'm Haru

JVM developer: Kotlin and Java, backend and desktop. Rust where it fits. I write native bindings by hand (Project Panama), ship desktop apps for three operating systems, and publish libraries to Maven Central.

Germany · Open to remote work (JVM / Kotlin / Backend)

Selected work

Project What it is Stack
Nexira Minecraft launcher, ~20 modules, 30 releases, Windows / Linux / macOS Kotlin, Compose Multiplatform, Gradle
smrt Mod mirror and pack registry: signed manifests, OpenAPI, control panel Rust, axum, Svelte
skinema Video decode and playback for JVM desktop, FFmpeg through hand-written FFM bindings, 6 platforms Kotlin, Panama, Skia
libtray · libnotify · libvault System tray, desktop notifications and secret storage for the JVM. D-Bus, Win32/WinRT and Objective-C runtime, no JNA Kotlin, Panama
Pharmacy Pharmacy POS and inventory, FEFO batch rotation, contract-first API. Live Spring Boot 4, Angular 21, MariaDB
open-smrt-network Clean-room network-protocol reimplementation across three Minecraft versions, compatibility without the telemetry Java, Forge, NeoForge
linux-osu-stable-installer Modular installer for osu! on Linux, five distributions, Wine and Wayland tuning Bash, gum, Nix

Published on Maven Central under dev.hivens. solyx (CALPHAD thermodynamics for the JVM) is pre-release and currently on hold.

Technical Stack

Domain Technologies
JVM Kotlin Java Spring Hibernate Gradle
Desktop & native Compose Panama DBus
Systems Rust Bash Linux Wine
Frontend Angular TypeScript Svelte Tailwind
Database MariaDB PostgreSQL Flyway
DevOps & Tools Docker Actions Git IntelliJ

GitHub Stats

Profile Views

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  1. Pharmacy Pharmacy Public

    Enterprise-grade Pharmacy Management System & POS built with Spring Boot 4 and Angular 21. Features FEFO inventory logic, optimistic locking, and contract-first OpenAPI architecture.

    TypeScript 1

  2. linux-osu-stable-installer linux-osu-stable-installer Public

    Play osu! (stable) on Linux with zero latency. Automates everything: fonts, audio buffers, and even Discord RPC. Just run and play.

    Shell 2 2

  3. Nexira Nexira Public

    Modern, lightweight, and open-source launcher for SmartyCraft built with Kotlin & Compose Multiplatform.

    Kotlin 11 2

  4. skinema skinema Public

    Video decode and playback for JVM desktop apps: FFmpeg through hand-written Java FFM (Panama) bindings, Skia frames out, Compose surface on top

    Kotlin

  5. solyx solyx Public

    Computational thermodynamics library for the JVM. CALPHAD-based phase equilibrium calculations for materials science and engineering. MIT License.

    Kotlin

  6. libtray libtray Public

    Cross-platform system tray for JVM 22+ via Project Panama. Replacement for dorkbox/SystemTray.

    Kotlin 1