Android, Flutter & Windows App Developer | Google Play publishing | VR for Meta Quest

UZYTAK is my software company in Poland (since 12/2021). We have built and published 20 of our own apps: 18 are live on Google Play and several in the Microsoft Store, each with store listings in 10 languages. I've been programming since 1996.

Mobile (Android): Kotlin, Java, Flutter/Dart, Jetpack, Room/SQLite, Google Play Billing (in-app purchases), CameraX, ML Kit/OCR, PDF generation, offline-first apps, R8/ProGuard, Gradle, AAB release.

Google Play publishing: store listings in 10 languages, Data safety, permissions declarations, content rating (IARC), closed testing with our own testers, policy rejections and appeals.

Windows desktop: C#/.NET, WPF/WinForms, MSIX packaging, Microsoft Store (Partner Center), native DLL integration (qpdf, Tesseract).

Web: WordPress/WooCommerce plugins, PHP, JavaScript, price calculators and product configurators, Stripe payments.

VR / mixed reality: Godot 4, OpenXR, Godot Meta Toolkit, passthrough, hand tracking, spatial anchors - Meta Quest 3/3S, Pico, Android XR.

Domain experience: construction and trades (estimates, materials, time tracking), document tools (scanner, PDF, OCR, invoices), Polish KSeF e-invoicing.

Work style: remote only, written communication in English and Polish, fixed prices or clear milestones. No ads and no junk in our software.