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I’m a Senior Mobile Engineer with 5+ years of experience building scalable, high-performance mobile applications using Flutter and Native Android (Java/Kotlin). 🔹 Core Expertise • Flutter & Dart • Native Android Development (Java/Kotlin) • Mobile Architecture & Scalable Systems • Performance Optimization & Clean Code • Firebase, REST APIs & Third-Party Integrations • AI-powered mobile applications • App Store & Google Play deployment • Cross-functional team collaboration 🔹 Highlights ✅ Top Rated Plus Freelancer on Upwork ✅ 30+ successful mobile projects delivered ✅ Experience with large-scale production applications ✅ Long-term collaborations with international teams ✅ Strong communication and business mindset Check my portfolio, and contact me to discuss more details about the job.

🏆 TOP RATED | Top 10% on Upwork | 100% Job Success | 15 Projects Delivered Most Flutter developers have never connected an app to physical hardware. Most IoT engineers can't ship a polished cross-platform product. Almost none of them are wiring AI agents into either. I work at that intersection — and it's where the hardest, most valuable problems live. I'm Mohamed, a Flutter and IoT engineer with 4+ years building production mobile apps, connected device systems, and AI-powered products for startups and businesses across Europe and the US. I own the full stack: Flutter UI, native platform integrations, Firebase/Supabase backends, IoT protocols, and LLM/AI agent layers. I also built and shipped CertifyCrafter — a live B2B SaaS product — solo. So I know what it takes to own a product, not just contribute to one. ━━━━━━━━━━━━━━━━━━━━━━━ WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━ ✅ Flutter apps with deep native hardware integration (BLE, MQTT, platform channels) ✅ AI agents and LLM-powered features inside real mobile products ✅ End-to-end IoT systems: device communication → mobile app → cloud backend ✅ Cross-platform mobile apps (iOS & Android) with Firebase/Supabase ✅ Internal business tools, dashboards, and workflow automation ✅ Full SaaS MVPs from concept to production deployment ✅ OpenAI & LLM integrations (RAG, function-calling, agents) ✅ API design and third-party integrations ━━━━━━━━━━━━━━━━━━━━━━━ RECENT CLIENT FEEDBACK ━━━━━━━━━━━━━━━━━━━━━━━ ⭐ "He was proactive and able to deal with tasks that were not 100% defined yet. He was quick but still brought great code quality. The few times when I thought he had forgotten something, it turned out it was done deliberately and with a purpose. I can highly recommend working with him." — German Medical University (Flutter + Supabase project) ⭐ "Mohamed was an excellent freelancer, showcasing professionalism and hard work to overcome challenges in completing this app." ⭐ "Excellent work, everything was done as planned." ━━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK ━━━━━━━━━━━━━━━━━━━━━━━ ✔ I take ownership — no micromanagement needed ✔ I flag problems early, not after they cost you time ✔ I communicate clearly and ship on time ✔ If something should be built differently, I'll tell you before I build it wrong ✔ Available for full project overlap with EU/UK working hours (EET) Best fit if you're building a mobile product that needs hardware integration, AI features, or both — and you want someone who treats your product like their own. Let's talk about what you're building.

Hi there, My name is Mahmoud and I am an expert in android native and cross-platform app development for IOS and android using Flutter. I can help you deliver the final app from the initial idea analysis, UI/UX design, app development, app test, and final release to the store. I am not a freelancer, I am a business partner whom you will find always to support and involve your idea so it can rise. **Types of applications I have experience with** ✅ Bluetooth apps ✅ Bluetooth apps connecting with boards like Arduino (Reading & Writing data to boards) ✅ Open cv apps( Scanner apps and Image processing) ✅ Social networks (Login, Register, Profile) ✅ In-App Purchase apps ✅ Stream apps ✅ Audio Books apps ✅ Chatbot apps ✅ AI apps ✅ Learning apps ✅ Food apps ✅ E-commerce applications ** Skills and Expertise ** ✅ Java & Kotlin ✅ Web services (JSON -XML ) ✅ App design ✅ App testing ✅ Launch applications ✅ Git and Bitbucket (Version Control) ✅ Cross-Platform ✅ Code Review ✅ JIRA ✅ Mobile Notifications ✅ Material Design ✅ Restful API ** Libraries and frameworks ** ➡︎ RXJava2 ➡︎ Dagger2 ➡︎ Rretroifet2 ➡︎ Butterknfe Picasso & Glide ➡︎ JUnit, Mockito and Espresso ➡︎ Firebase and google services ➡︎ AndroidX/JetPack ➡︎ Exo Player ➡︎ Open Cv ➡︎ ** Design patterns ** ✅ MVP ✅ MVC ✅ MVVP ** Brilliant reviews by my previous clients ** ⭐️ "Mahmoud is very cooprate developer, has very good development experience." ⭐️ Another super great experience with Mahmoud. There is really no problem he cannot solve with Android App. Again this was another app which required external device to connect to phone. Mahmoud developed this remotely in a very professional way and fixed everything till perfection. We feel very lucky to have met him as apart from great competence in developing Android App Mahmoud is very nice and gentle guy to deal with and has always a positive attitude. Well done Mahmoud !" ⭐️ "Job completed on time with outstanding quality of work highly recommended" If we have an idea that you need to make real, Just tell me details and see the magic. Best regards,

Top Rated Mobile Developer | Full Stack Mobile & Web Developer | iOS, Android, AI, Kotlin, KMP I help startups turn app ideas into live, scalable mobile products, fast, clean, and built to grow. What I help with: → Mobile App Development → Android App Development → Native App Development → iOS Development → Android → iPad App Development → Kotlin → Mobile App → Java → Android SDK → Hybrid App Development → In-App Purchases → Core Java → Smartphone → Flutter → Android Studio → Android Tablet → Android App → Firebase What I can build for you: → Native Android apps using Kotlin, Jetpack Compose, and Clean Architecture → Cross-platform apps using Kotlin Multiplatform — Android + iOS from one shared codebase → Full-stack mobile and web platforms with scalable backend integration → AI-powered mobile features, automation, smart search, recommendations, and chat experiences → Payment integrations including Stripe, PayPal, and local payment gateways → Real-time features using Firebase, WebSockets, live tracking, and push notifications → Maps, GPS, delivery tracking, location-based services, and Play Store deployment → App optimization for speed, stability, crash reduction, and smaller app size Industries I’ve shipped in: Fintech · E-commerce · Delivery & Tracking · Streaming · Government Services · SaaS · Startup MVPs You’ll get clear communication, realistic timelines, clean code, and a product-focused developer who understands startup speed without sacrificing quality. Send me your app idea, Figma design, or current codebase, and I’ll reply with a clear delivery plan.

🏆 Top Rated Plus Freelancer ⭐ 100% Job Success Score ⏰ 8,800+ Hours Delivered 💼 15+ Years Experience in Software Engineering I am a Professional Software Engineer, WordPress Systems Architect, Backend Developer, and Cross-Platform Application Developer with a Bachelor’s degree in Computer Engineering and over 15 years of experience designing and building complex production systems. I specialize in building and scaling enterprise-grade platforms including WordPress systems, WooCommerce stores, SaaS applications, APIs, mobile applications, AI systems, streaming platforms, and high-traffic infrastructures. My core expertise is not just development, but system design, architecture, and solving deep production-level problems such as failed migrations, performance bottlenecks, system instability, scalability issues, and complex backend logic challenges. 🧠 Backend & System Engineering I design and build scalable backend systems using custom PHP architecture, REST APIs, and modular system design approaches. My work includes microservices-style backend logic, business automation systems, and enterprise-level application structures. I also create full software architecture designs and system diagrams for web applications, APIs, SaaS platforms, and mobile ecosystems. 🧩 WordPress & WooCommerce Engineering I specialize in advanced WordPress development including custom plugins, WooCommerce customization, performance optimization, and production-level debugging. I also work with WordPress as a headless CMS, where it is used as a backend content system connected to modern frontend applications via APIs. 🔌 API & Integration Systems I build REST APIs and integration layers for web and mobile applications, including WooCommerce APIs, Shopify applications, third-party system integrations, and cross-platform data communication systems. 📱 Cross-Platform Mobile & Application Development I develop backend systems and application architectures for cross-platform mobile applications, including Android, iOS, and hybrid apps. I have experience building and publishing hybrid mobile applications using frameworks such as Cordova, enabling web-based applications to be deployed as native mobile apps across platforms. My work includes: Mobile backend APIs Real-time communication systems Data synchronization layers Scalable app backend architecture Hybrid mobile app development (Cordova-based applications) 🎬 Media & Streaming Systems I build media infrastructure systems including: HLS video streaming platforms Scalable media delivery systems Content distribution architecture High-load streaming backend systems 🤖 AI & Automation Systems I design and implement AI-powered systems and automation workflows, including: AI agents for business automation Intelligent backend workflows Data processing pipelines Automated decision systems Business logic automation systems 🗄️ Data & Storage Systems I work with advanced data architectures including: MySQL, MariaDB, SQLite, MongoDB, Oracle File-system-based data architectures (FHS-style systems) Custom storage logic systems High-performance data processing pipelines Data extraction and aggregation systems ⚙️ Infrastructure & Server Engineering I handle infrastructure-level engineering including: Linux & Windows server management Hosting environments (cPanel, VPS, dedicated servers) Performance optimization (CPU, memory, DB tuning) Reverse proxy and CDN setups 🎨 Frontend & UI Engineering I convert Figma designs into production-ready WordPress themes and frontend systems, ensuring responsive, optimized, and scalable UI implementations. 📊 Data Extraction & Crawling Systems I build structured data extraction systems, crawling pipelines, and API-based data aggregation systems for business intelligence and automation workflows. 🧱 SaaS & Platform Engineering I build full SaaS and platform systems including: Multi-user platforms Marketplace systems Subscription systems High-traffic content platforms Enterprise dashboards and admin systems 🔥 WHAT I SOLVE BEST I specialize in solving difficult production problems including: Broken WordPress / WooCommerce systems Website full migrations High CPU / performance issues Database bottlenecks API integration failures Scaling and infrastructure instability Complex backend debugging Speed optimization tasks 🧠 CORE TECH STACK PHP, WordPress, MySQL, MariaDB, MongoDB, SQLite, File-system based architectures, Oracle, REST APIs, Linux, OpenLiteSpeed, cPanel, LiteSpeed Cache, caching systems, security hardening, WooCommerce, cloud infrastructure, mobile APIs, and automation systems. 🎯 WORKING APPROACH I focus on delivering clean, scalable, and production-ready systems that solve real business problems. My approach is simple: understand the system deeply, design the correct architecture, identify root causes accurately, and implement long-term stable solutions that improve performance, scalability, and reliability.

Hi, My name is Arsanious, I'm a professional Mobile App Developer with a proven ability to efficiently solve complex problems and collaboration with teams to deliver high-quality scalable code. Working as a Mobile App developer is my real passion that originally came starting from being a kid who wants to explore every little thing on mobile technology. 🟣 My Services: ✔️Mobile App Development ✔️Android + IOS ✔️Kotlin ✔️Jetpack Compose ✔️Ktor ✔️Architecture: MVVM, MVI, Clean Architecture ✔️Java ✔️Scalable documented code 🟣 Tools: Coroutines, Flows, Retrofit, ViewModel, Hilt, ViewBinding, WorkManager, AlarmManager, Room Local Database, Git, Android Studio