09/26/2026 updated
100 % available
iOS & Android App Export | AI & API Integration | Offline-First Apps
Orneta, Poland
Worldwide
BA Computer Science, Apple Certified iOS DeveloperFlutterApplication Programming Interfaces (APIs)Android (Software)Mobile Application DevelopmentMessaging Application Programming InterfaceNode.jsIonicSwiftuiIos FrameworksSwift (Programming Language)Google FirebaseExpo.ioBackendStripeReact Native
Hi, I am Dawid from Poland. I help companies and enterprises build mobile applications that work anywhere, anytime, even without an internet connection. From logistics tracking to field service tools, healthcare apps, and agricultural platforms, I've spent 7+ years delivering production-grade iOS and Android applications that serve thousands of users in demanding environments, including remote job sites, rural farms, emergency scenes, and everything in between.
My focus is simple: deliver reliable, intelligent, and maintainable mobile solutions that drive real business outcomes, on time and within budget.
INDUSTRIES
➡️ Logistics and Supply Chain
➡️ Field Service and Construction
➡️ Healthcare and Emergency Services
➡️ Agriculture and Environmental Science
➡️ Productivity and Personal Utilities
➡️ Game Development
WHAT I BUILD
➡️ OFFLINE-FIRST MOBILE APPLICATIONS
As an Offline-First App Developer, I design and build mobile applications with local data persistence, conflict resolution, and intelligent synchronization mechanisms. I work with Realm, SQLite, Core Data, and WatermelonDB for local storage, along with background sync, queue management, and delta updates. Every application is designed to remain reliable whether users are online or completely off-grid.
➡️ iOS & ANDROID DEVELOPMENT
Native iOS development with Swift and SwiftUI, combined with cross-platform development using React Native and Flutter. I build iPhone and iPad applications optimized for performance, battery efficiency, and user experience, as well as Android applications following modern Material Design principles. I also implement push notifications, background processing, and platform-specific integrations.
➡️ API INTEGRATION & BACKEND SERVICES
RESTful APIs, GraphQL endpoints, webhooks, and third-party integrations that connect mobile applications to your existing systems. I work with Node.js backend services, Stripe payment processing, real-time synchronization, ERP systems, CRM platforms, payment gateways, and custom APIs. Every integration is designed for secure, reliable communication between systems.
➡️ INDUSTRY-SPECIFIC MOBILE SOLUTIONS I build logistics and supply chain tracking apps, field service and construction management tools, healthcare and emergency services applications, agriculture and environmental science platforms, productivity tools, personal utilities, and engaging mobile gaming experiences.
TECHNOLOGIES I USE
➡️ MOBILE DEVELOPMENT
React Native, Expo, Flutter, Swift, SwiftUI, Kotlin, Java
➡️ AI & MACHINE LEARNING
OpenAI API, TensorFlow Lite, LLM, Core ML, ML Kit, Natural Language Processing
➡️ BACKEND & API
Node.js, REST API, GraphQL, Express.js, Firebase, Supabase
➡️ DATABASES & STORAGE
Realm, SQLite, Core Data, WatermelonDB, AsyncStorage, MongoDB
Ready to launch something powerful? Let's connect!
Experience
Professional experience5 - 10 years
Freelancer since2019
Languages
EnglishNative speakerPolishNative speaker