Stefan K.

I only take projects I am 100% confident I can deliver. With 20+ years of experience, I build high-performance, secure, cross-platform desktop, mobile, and web applications that are maintainable and production-ready. I help businesses build or modernize software that runs reliably across platforms, with a focus on clean architecture, security, and long-term maintainability. Cross-Platform Desktop Applications * Rust (memory-safe, high-performance core systems) * Tauri v2 (lightweight, secure, cross-platform desktop applications) * Electron.js (when required by project constraints) * Native OS integrations (Windows, macOS, Linux) Mobile Applications * iOS development (Objective-C & Swift) * Android SDK * API-driven mobile applications * Shared business logic across desktop, mobile, and backend systems Web & Backend Systems * PHP (Laravel, Phalcon, CodeIgniter, Kohana – MVC) * Node.js (Express) * MySQL (scalable, high-traffic systems) * MongoDB (Mongoose) * REST API design, development, and third-party integrations * Full LAMP & MEAN stack development * Amazon AWS, DigitalOcean, Linode, OVH VPS, bare-metal servers Industry Experience * Time Tracking Systems * Face Recognition * Cryptocurrency Platforms * Real Estate (RETS & IDX APIs, custom solutions) Why clients choose me * Rust-first approach for performance & safety * True cross-platform expertise (desktop, mobile, backend) * Clean, maintainable, production-ready code * Clear communication and realistic delivery timelines