I'm Yossi Karni, an independent app developer specializing in iOS, Android, and web applications for businesses and startups across London.
Start a Project →From concept to launch, I provide end-to-end app development services tailored to your business needs.
Native iPhone and iPad applications built with Swift and SwiftUI, optimized for performance and user experience.
Modern Android apps using Kotlin and Jetpack Compose, following Material Design principles.
Responsive web apps with React, Vue, or vanilla JavaScript—whatever fits your project best.
Thoughtful interface design that balances aesthetics with usability and accessibility.
RESTful APIs, database design, and cloud infrastructure to power your applications.
Strategic technical guidance to help you make informed decisions about your project.
Recent projects that showcase the range of applications I've developed for clients.
Automated OTP code reader with SMS auto-reply functionality. Features toggle controls and default SMS app integration.
Location-aware app with precise prayer time calculations, custom notifications, and Hebrew calendar integration.
Real-time dashboard for sales tracking, team performance, and customer insights with data visualization.
I'm an independent app developer based in London, focused on creating custom software solutions for businesses and entrepreneurs.
With expertise across mobile and web platforms, I handle projects from initial planning through to deployment and maintenance. I believe in writing clean, maintainable code and designing interfaces that people actually enjoy using.
When I'm not coding, you'll find me exploring London's tech scene, contributing to open-source projects, or experimenting with new frameworks and tools.
Have a project in mind? I'd love to hear about it. Send me a message and I'll get back to you within 24 hours.