Paweł Karniej

Expert Mobile App Developer | React Native & SwiftUI Specialist

I'm a mobile app developer with 8+ years of experience building and scaling production apps in React Native, SwiftUI, and AI-powered products. My technical expertise spans JavaScript, TypeScript, SwiftUI, Expo, Next.js, and OpenAI API integrations, allowing me to build scalable, robust, and user-friendly apps tailored to your business needs.

I work independently, not as part of an agency - when you hire me, you're working directly with the person writing the code, with no account managers or subcontractors in between.

Key Achievements:

- Credited Developer, Bat Around: Contributing gameplay and physics work to Bat Around, a live sports game on the App Store.
- Founder & 2x Product Exit: Founded and personally built VidNotes (AI video transcription) end-to-end across iOS, Android, web, Chrome extension and backend, and grew it to a successful exit. Also built and sold AIVidly, an AI video, image and voice app. Two products built and exited independently.
- Published App Store Apps: Designed, built and shipped FIFTN (screen time and focus, native SwiftUI with FamilyControls and DeviceActivity) and Coldsmith (cold exposure and breathwork with an Apple Watch companion) solo, under my own name.
- Acquired Product Operator: Acquired and continue to operate Teleprompter X, a live creator app, handling subscriptions, release operations and ongoing development.
- Leadership in App Overhauls: Led the complete redevelopment of the SNO Oslo app, introducing a new architecture and features like Personal Trainer lesson reservations.
- Diverse Project Experience: Worked on mapping applications for large corporations, B2B solutions like Celebrate and Fitmate, and enterprise clients including Emirates Airlines.
- Open Source and Writing: Created themegen.xyz, contribute to the React Native community with Sticky Parallax Header, and write technical articles for platforms like LogRocket.

I am dedicated to creating exceptional mobile experiences that not only meet your needs but also delight your users.

Let's collaborate to bring your ideas to life!