Matej K.

⭐ Specialized in Mobile App Development | Flutter, Kotlin & Swift | iOS and Android ⭐ 6+ Years of Advanced Programming Experience ⭐ Expert in Crafting High-Performance Mobile Applications Featured Projects and Achievements: 🔵 'Ihre Apotheken' App Transformation Led the transformation of the Ihre Apotheken app into a robust digital health platform for German pharmacies, achieving 100k+ downloads and a 4.5 App Store rating. Technologies: Flutter, Dart, Firebase, Riverpod 🔵 Revlum Offerwall SDK Development Developed Android and iOS SDKs for Revlum, enabling seamless configuration and launch of an offerwall WebView for user rewards. The Android SDK was built with Jetpack Compose, Koin, Retrofit, and DataStore, deployed as a binary to AWS S3. The iOS SDK used SwiftUI, UIKit, async/await, and URLSession, published as an XCFramework to GitHub releases. Created Flutter and React Native plugins published on pub.dev and npm. 🔵 MAF iOS SDK Redevelopment Fixed a non-functional iOS SDK for MAF, built with UIKit and WebView (WebKit), distributed as an XCFramework via SPM to GitHub releases. Improved integration documentation. 🟠 Car Rental Application Enhancements Enhanced a car rental app, integrating deep linking with uni links and the Smartcar API for contactless lock/unlock functionality. Fixed bugs and refined the codebase. 🟠 PiP App Overhaul Converted the PiP app from Android to Flutter, improving task scheduling and data management. Migrated from Room to Isar for NoSQL performance. Technologies: Flutter, Isar, Firebase, Sentry 🟠 Aplauz Digital Wallet Enhanced UX with biometric authentication and automated localization. Built with Flutter and Riverpod for robust architecture. Technologies: Flutter, Python, Riverpod 🔵 ChatGPTool Developed a Flutter-based app integrating OpenAI's ChatGPT and Whisper APIs for streamlined company communication. Used Firebase for backend services like authentication, cloud storage, and serverless functions. Technologies: Flutter, Firebase, OpenAI APIs ⚫ myKiK POS & Loyalty App Led the development of the myKiK app for KiK Textile & Non Food B.V., building a retail and loyalty platform with Flutter Bloc, Retrofit, and CI/CD via Jenkins. Technologies: Flutter, Bloc, Retrofit, Jenkins 🔵 FootFact Developed a machine-learning-driven app for precise foot measurements, integrating offline-first functionality with Dio, Floor database, and Firebase Authentication. Technologies: Flutter, Firebase, Dio, Floor Database 🟠 Spective Connect IoT Developed an IoT solution addressing WiFi disconnection issues and adding service reporting features using MQTT Protocol and Jetpack components like Room. Technologies: Kotlin, MQTT Protocol, Firebase Analytics 👨‍🏫 Lecturer at Algebra University College, Zagreb Led a 6-month, 230+ hour Android development course, covering Kotlin, Android SDK, Room, Coroutines, Retrofit, MVVM, and clean architecture principles. 🎓 MSc in Computer Engineering Proud graduate of Josip Juraj Strossmayer University, Croatia. 🌟 Why Choose Me? Client-Centric Solutions: I meet project requirements while exceeding expectations. Innovative Problem Solver: I deliver impactful, scalable solutions. Reliable & Communicative: I ensure seamless workflows and client satisfaction. 😁 Ready to elevate your mobile application? Let’s connect and discuss your project needs!