I write software for myself first and publish the parts that turned out well. Mostly Windows desktop apps in C#, backends and automation in Python, web frontends in React. Somewhere along the way I got into Android ROM porting, and that's where most of my weekends go now.
I've been at this since 2017 — private tooling for game servers I was running, then Linux and VPS work, then a long pause, then back to it properly in 2023. None of that path was planned.
Site: sonydev.de
Slipstream — self-hosted media downloader, FastAPI + React, ships as a single container. The whole point is not lying to you: it only offers formats that actually exist for the URL you paste. No invented 4K options, no fake progress bar, no detour through three ad pages. AGPL-3.0.
SonyDev Cleaner — Windows maintenance utility in WPF on .NET 8. It scans first, shows exactly what it found and how much space each category uses, then lets you decide. It also includes large-file analysis, disk usage, startup management and an activity log. No registry cleaning, magic boost buttons or subscription. GPL-3.0.
HyperOS 4 Port Builder — one-click ROM port builder for the Xiaomi 14 (houji), assembled from two official OTA packages. Handles EROFS repacking, AVB and the fastboot flow. It supports exactly one device on purpose — generic port tools fall apart on precisely these details.
Rust CUI Builder — browser-based visual editor for Rust server plugin interfaces. Drag panels and buttons around instead of guessing pixel coordinates in C#, then export a plugin starter. Apache-2.0.
SonyDev Bypass — .NET 8 launcher client for a self-hosted catalog, updates via Velopack. Source is public so anyone can check what it actually does on their machine.
C# · .NET 8 · WPF · Python · FastAPI · TypeScript · React · Docker · Linux and nginx on a VPS · Android internals — EROFS, AVB, fastboot
I try not to lie to the user in the UI. If something is about to be deleted, the app says so plainly. If a video only exists in 720p, nothing advertises 1080p. Most of what's here exists because the tool I wanted was either missing or paywalled.
Everything is GPL, AGPL or Apache — fork it, ship it, open an issue if it breaks.