Do you have a Mobile app idea that’s stuck in planning, or an existing Android or iOS app facing bugs, slow performance, and missed deadlines? I help businesses turn ideas into high-performance, scalable mobile apps for Android and iOS, with clean architecture and long-term reliability. A professional mobile app developer with over 7 years of experience specializing in native Android apps (Kotlin/Java), native iOS apps (Swift), and cross-platform mobile apps (Flutter, Kotlin Multiplatform KMP). I don’t just write code, I build partnerships based on trust, clear communication, and a commitment to your success. My focus is on delivering clean, maintainable, and production-ready Android and iOS mobile applications that provide a flawless user experience. I build mobile apps that are: - • Fast and optimized for performance • Cleanly architected Android & iOS apps • Easy to maintain • Ready for production & scaling. My Skills: - - For Android apps: Kotlin/Java - For iOS apps: Swift, SwiftUI, UIKit - For Cross-platform mobile apps: Kotlin Multiplatform (KMP), Compose Multiplatform (CMP), Flutter (Dart) - For Backend Development: Java / Kotlin Spring Boot (mobile app APIs) Architecture & Quality: - - MVVM and Clean Architecture for Android apps and iOS apps - Modular, scalable mobile app codebases - Strong focus on mobile app performance & stability - Easy-to-maintain, well-documented code for long-term mobile app growth Tools I use: - Android Studio (Android apps), Xcode (iOS apps), IntelliJ, Visual Studio Code, Figma My Expertise Covers High-Quality Native Mobile App Design & Development, and also Flutter App Development: - - End-to-End mobile app development: From concept to launch on App Store & Google Play - Native Android Apps Development using Jetpack Compose or XML - Native iOS Apps Development using SwiftUI or UIKit - Cross-platform mobile apps using Kotlin Multiplatform (KMP) and Flutter (Android + iOS) - Flutter State management: Bloc, Provider, Riverpod, GetX - Custom UI/UX for Android apps and iOS apps - WebSockets for real-time mobile apps - Point of Sale (POS) mobile app development - Video upload, compression, metadata in mobile apps - Real-time chat UI, AI chat, messaging flows - Audio recording & upload for mobile apps - WebRTC for mobile communication apps - Offline support, caching, mobile app performance optimization - Firebase & Backend Skills - Firebase Firestore, Auth, Storage, Functions - Supabase / Postgres integrations - REST API integration + secure session handling - Scalable database design - Cloud services (Google Cloud, AWS, Azure) - Monetization: Admob ads, ads integration, payment gateways - In-app purchases (IAP) - Apple StoreKit for iOS apps - Google Play Billing - AdMob (banner, interstitial, rewarded ads) - ATT (App Tracking Transparency) for iOS apps - Subscription paywalls, free trials, usage limits - TestFlight setup + App Store / Play Store submission - UI/UX & App Redesign - UX/UI polish using Figma - App icon redesign - Catholic/spiritual/calming design themes - Consistent typography, spacing, and colors - Feature-ready scalable design systems - Custom Module Development - Reusable plug-and-play modules - Smooth UI/UX following existing style - Integration with APIs, Firebase, third-party SDKs - Bug-free delivery with documentation I provide: - - Excellent mobile app architecture skills - Experience integrating mobile apps with third-party SDKs and APIs - Strong understanding of Android Material & iOS Human Interface Guidelines - Full mobile app development lifecycle knowledge - Proven experience publishing Android apps and iOS apps What You Get When Working With Me: - Clean, production-ready Android & iOS mobile app architecture - Honest timelines & clear communication - Regular progress updates on your mobile app - Maintainable mobile app code - Fast message replies (10–20 minutes) - Support even after delivery, I don’t disappear If you have a mobile app idea, an existing Android or iOS app that needs improvement, or a mobile app problem that needs fixing, send me a message. #MobileAppDeveloper #AndroidApps #Kotlin #iOSApps #Swift #MobileApps #AndroidDeveloper #iOSDeveloper #FlutterDeveloper #KotlinDeveloper #SwiftDeveloper #KotlinMultiplatform #KMP #CrossPlatformMobileApps #HighPerformanceMobileApps #CleanArchitecture

Senior Android developer specializing in Kotlin, Jetpack Compose, Firebase, and scalable mobile app architecture. I build fast, stable, production-ready Android apps with clean code, smooth UI performance, and reliable backend integrations. I also help improve existing apps by fixing UI lag, API bottlenecks, poor state management, and architecture issues. My experience includes: • Firebase Authentication, Firestore, Realtime Database, FCM, Crashlytics • REST API integrations for Android apps • MVVM and Clean Architecture • Dependency Injection using Clean Architecture principles • Advanced Firebase integrations for scalable mobile apps • Performance optimization and scalable app structure I’ve worked on apps involving real-time systems, AI-powered features, educational platforms, and custom business tools. Whether you need a new MVP or improvements to an existing app, I focus on building maintainable apps that scale properly and deliver a smooth user experience. Feel free to reach out if you'd like to discuss your project requirements or technical approach.

Android Developer specializing in high performance native Kotlin applications and cross-platform infrastructure built on the Flutter framework and Dart language ecosystem. I deliver clean, scalable, production ready applications engineered on time, utilizing modern architectural patterns to ensure your software scales seamlessly. I am an Android Developer and Flutter Programmer with 4+ years of experience building high performance Android applications and cross-platform architecture for startups, SaaS businesses, and enterprise clients. I specialize in end-to-end Android engineering, from native interfaces using Jetpack Compose and XML layouts to database synchronization, REST API integration, and complete application deployment on the Google Play Store. Whether you need a native Android app built with Kotlin, a modern application using Jetpack Compose and MVVM Clean Architecture, or an efficient cross-platform Flutter framework, I build it right. ✅ Android & Flutter Development Solutions I Deliver: ☑️ Native Android Apps : High-speed native development using Kotlin & Jetpack Compose. ☑️ Clean Codebases : Structuring Android Kotlin systems with clean, scalable, production-ready source code. ☑️ Cross-Platform Scaling: Deploying Flutter frameworks to support multiple platforms from a single Dart codebase. ☑️ SaaS Enterprise Architecture: Multi role tenant systems, secure user access hierarchies, and cloud database integrations. ☑️ Subscription Management: Integrating membership tiers, usage based dashboards, and secure automated billing logic. ☑️ Startup MVP Deployment: Rapid Android application engineering optimized for fast, lean, market-ready verification. ☑️ System Integrations: Connecting custom Android business applications with secure REST API & third-party web services. ☑️ Layout Engineering : Translating technical specifications into pixel-perfect Jetpack Compose & XML layouts. ☑️ Flutter Backend Integration: Wiring Flutter systems into real-time cloud infrastructure, data streams, and serverless logic. ❇️ Technical Stack & Architecture Matrix: ❖ Languages: Kotlin (Primary language for native Android systems), Dart, and Java. ❖ Native Android UI: Jetpack Compose declarative UI and legacy XML layout structures. ❖ Architecture: MVVM and Clean Architecture decoupling patterns for high-scale applications. ❖ Cross-Platform: Flutter framework and Dart ecosystem management. ❖ State Management: Scalable workflows using Riverpod, Provider, and BLoC. ❖ Data Layers: REST API consumption via Retrofit, Room Database, and SQLite local storage. ❖ Cloud Services: Cloud messaging (FCM), push notifications, secure user authentication, and data triggers. ❖ Location Services: Google Maps API, GPS background services, and real-time geospatial tracking. 🟢 Real-World Applications I Have Engineered: ➤ Enterprise SaaS Platform: Cloud-connected operational software with multi-tenant permissions and complex database syncing. ➤ Logistics & Field Force System: Live agent GPS background tracking, task state management, and real-time cloud data pipelines. ➤ On-Demand Booking Android App: High-performance service booking workflows, provider matching, real-time background location tracking, and integrated secure payment pipelines. ➤ E-Commerce Android App: Full retail shopping experience featuring complex database catalog configurations, cart state management, checkout validation pipelines, and real-time admin sync backend infrastructure built with Kotlin & Jetpack Compose. ➤ Performance Tracking System: Local database data streaming, tracking metrics, and automated background data syncs. ➤ High-Speed Startup MVP: Accelerated Android application development lifecycle from system scope to Play Store launch in under 6 weeks. 🟢 Strategic Value & Professional Execution: ➤ Proven Experience: 4+ years of dedicated native Android engineering and Flutter development. ➤ Algorithmic Standing: Consistent 100% Job Success Score achieved through technical precision. ➤ Architectural Discipline: Every application is built with decoupled MVVM structures to ensure long-term codebase scale. ➤ Technical Communication: Clear technical updates, clear milestone planning, and transparent scope management. I do not just write code, I help businesses launch complete, stable, and highly performant Android applications and Flutter systems that operate efficiently and scale seamlessly. Send me a message detailing your technical scope. I will respond within a few hours with an architectural plan, exact timeline assessment, and technical breakdown. Let's engineer a high performance application together. Your Android & Flutter Developer, Uzair Aziz

🚀 Senior Mobile App Developer | Flutter | React Native | Android | iOS | AI-Powered Apps ✅ Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 🏆 by Upwork (Top 10%) ✅ 10+ years of experience ✅ 3400+ hours and still counting ✅ 100% Job Success (Client Satisfaction Ratio) ✅ High-Quality Work ✅ Budget-friendly ✅ Fluent English Looking for a reliable Flutter Developer, React Native Developer, or Mobile App Developer who can transform your idea into a high-quality mobile application? With 8+ years of experience, I build scalable, secure, and high-performance Android and iOS applications for startups, SaaS businesses, enterprises, and growing companies. Whether you need an MVP, a complete mobile product, or long-term development support, I deliver clean code, intuitive user experiences, and production-ready applications. Mobile App Development Expertise • Flutter Development • React Native Development • Android App Development (Kotlin) • Cross-Platform Mobile Applications • Native Android Development • Custom Mobile App Development • Mobile UI Implementation • MVP Development • Enterprise Mobile Applications • SaaS Mobile Applications AI Mobile Applications Build intelligent mobile experiences using modern AI technologies. • OpenAI (ChatGPT) API Integration • Google Gemini Integration • Claude AI Integration • AI Chatbots • AI Assistants • AI Content Generation • AI Image Generation • AI Automation • AI Document Processing Backend & API Integration • REST API Development & Integration • GraphQL APIs • Firebase • Supabase • Authentication & Authorization • OAuth • JWT Authentication • Cloud Functions • Third-Party API Integration Features I Build • Push Notifications (Firebase Cloud Messaging) • Google Maps & GPS Tracking • Live Location Tracking • Payment Gateway Integration (Stripe, Razorpay, PayPal) • In-App Purchases & Subscriptions • Real-Time Chat • Video Calling & Voice Calling • Bluetooth Low Energy (BLE) • IoT Device Connectivity • QR Code & Barcode Scanner • Camera Integration • Media Upload & Processing • Social Login (Google, Apple, Facebook) • OTP Authentication • Biometric Authentication (Face ID & Fingerprint) • Offline Data Synchronization • Background Services • Deep Linking • Analytics & Crash Reporting Industries • Healthcare & Telemedicine • FinTech & Digital Payments • E-commerce • Marketplace Apps • Logistics & Fleet Management • Food Delivery • Fitness & Wellness • Education (EdTech) • Social Networking • Booking & Reservation Systems • CRM Applications • Business Productivity Apps • SaaS Platforms Tech Stack Flutter • React Native • Kotlin • Dart • Java • Firebase • Supabase • SQLite • Hive • REST APIs • GraphQL • Google Maps API • Firebase Cloud Messaging (FCM) • Stripe • PayPal • Razorpay • OpenAI API • Gemini API • Claude API • Git • GitHub • CI/CD Why Clients Choose Me ✔ 8+ Years of Mobile App Development Experience ✔ Clean, Scalable & Maintainable Code ✔ Pixel-Perfect UI with Excellent User Experience ✔ Performance Optimization ✔ Secure Architecture ✔ Fast Communication & Regular Updates ✔ Agile Development Process ✔ Long-Term Maintenance & Support If you're looking for a Flutter Expert, React Native Expert, or Mobile App Developer to build a modern, scalable, and feature-rich Android or iOS application, I'd be happy to discuss your project and help bring your vision to life. 📞 𝐅𝐫𝐞𝐞 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 Message me to validate your idea and receive a clear MVP roadmap (features, timeline, and tech stack) within 24 hours — no obligation. Let’s build something impactful, Akshay Khajuria 

New account Working on reputation (lower prices) Developer with 9+ years of experience ☕ — 7+ years in Android development — Entered the top 10% of Upwork talent within the first 4 orders (Top-Rated badge) — Complete Android Expertise - from high-level APIs to low-level OS internals — Kotlin Multiplatform Developer - delivering apps for both Android & iOS — Solo developer, no teams behind, up to 2 active projects. Here’s what my clients say about me: “𝑬𝒙𝒄𝒆𝒑𝒕𝒊𝒐𝒏𝒂𝒍 𝒍𝒐𝒘-𝒍𝒆𝒗𝒆𝒍 𝑨𝒏𝒅𝒓𝒐𝒊𝒅 𝒅𝒆𝒗𝒆𝒍𝒐𝒑𝒆𝒓 𝒘𝒊𝒕𝒉 𝒅𝒆𝒆𝒑 𝒕𝒆𝒄𝒉𝒏𝒊𝒄𝒂𝒍 𝒆𝒙𝒑𝒆𝒓𝒕𝒊𝒔𝒆 𝒂𝒏𝒅 𝒂 𝒓𝒂𝒓𝒆 𝒎𝒂𝒔𝒕𝒆𝒓𝒚 𝒐𝒇 𝒔𝒚𝒔𝒕𝒆𝒎-𝒍𝒆𝒗𝒆𝒍 𝒑𝒓𝒐𝒈𝒓𝒂𝒎𝒎𝒊𝒏𝒈” – Lead Android R&D Manager, Tel-Aviv “𝑷𝒍𝒆𝒂𝒔𝒖𝒓𝒆 𝒕𝒐 𝒘𝒐𝒓𝒌 𝒘𝒊𝒕𝒉. 𝑰𝒈𝒐𝒓 𝒅𝒆𝒆𝒑𝒍𝒚 𝒅𝒊𝒗𝒆𝒅 𝒊𝒏𝒕𝒐 𝒕𝒉𝒆 𝒑𝒓𝒐𝒃𝒍𝒆𝒎 𝒂𝒏𝒅 𝒘𝒂𝒔 𝒂𝒃𝒍𝒆 𝒕𝒐 𝒇𝒊𝒙 𝒊𝒕 𝒊𝒏 𝒂 𝒔𝒉𝒐𝒓𝒕 𝒂𝒎𝒐𝒖𝒏𝒕 𝒐𝒇 𝒕𝒊𝒎𝒆. 𝑺𝒐 𝒉𝒊𝒈𝒉𝒍𝒚 𝒓𝒆𝒄𝒐𝒎𝒎𝒆𝒏𝒅 𝒂𝒔 𝒔𝒐𝒍𝒊𝒅 𝒑𝒓𝒐𝒇𝒆𝒔𝒔𝒊𝒐𝒏𝒂𝒍” - iOS/Android Developer, 13+ YoE, Poland ————— Android Development Skills Languages: Kotlin, Java, C++ Architecture & Core: Clean Architecture, MVVM, MVI, SOLID, Dagger, Hilt, Koin, Coroutines, Flow, LiveData, RxJava, Multi-threading System & Low-Level: NDK/JNI, AIDL, Binder IPC, AOSP Network & Data: Retrofit, Ktor, WebRTC, gRPC, Native Networking (libc), TLS, Room, DataStore UI & Media: Jetpack Compose, XML, Material 3, Media3 (ExoPlayer), MediaStore API, EGL, Camera2, Surface API Build & Tools: Gradle (KTS, Multi-module, C/C++ Config), CMake, R8/Proguard, Git, GitHub, Linux Terminal Unit Testing: JUnit, Mockito ————— Frameworks I worked with: AI (OpenAI API, Google Gemini API) Firebase (Cloud Messaging, Authentication, Realtime DB, Storage, Crashlytics, Analytics) Google Maps Platform (Maps SDK, Places API, Directions API, Geocoding API) Mapbox Platform Monetization (AdMob, Unity Ads) Google Cloud APIs Facebook SDK Advanced Animations (Lottie, AVD, Compose Animations, Property Animations, MotionLayout) AWS Server Setup (EC2, VPC, Security Groups) VPN (OpenVPN, WireGuard) ZXing ————— Additional Skills App Security & Diagnostics: Frida, JADX, Ghidra Web Fundamentals: JavaScript, HTML, CSS

Ship cross-platform apps and SDKs with Kotlin Multiplatform & Compose that cut delivery time by ~40%, improve startup by up to 60%, and keep production at 99.9% uptime—without sacrificing native UX. Best for: - Startups wanting Android+iOS from one team/one codebase - Teams migrating to KMP/Compose - Products needing revenue-grade SDKs (ads, media, auth, payments) Results I’ve delivered: - +25% ad revenue via SDK optimizations (AdBlend) - 40–60% faster loads and lower API latency (WavFlow) - <2% crash rate and 40% faster cold start on production Android apps - Operated at 99.9% uptime in live environments Selected work: - Magnate — real-time messaging (KMP, end-to-end encryption) - AdBlend SDK — banner/interstitial/rewarded/native; automated mediation; +25% revenue - Gear VPN — secure, fast, global VPN (KMP + native shells) - WavFlow — music streaming; AI recs; 60% startup improvement How I work: 1. Architecture: Clean Architecture, MVVM, SOLID 2. Android: Jetpack Compose, Play compliance, performance profiling 3. iOS: SwiftUI shells over shared KMP modules for native feel 4. Backend/infra: Ktor, Firebase/Supabase, MongoDB, WebSockets, CI/CD 5. Compliance & quality: PCI DSS awareness, automated tests, release checklists Open-source & community: Lead KMP at Magnate (Dublin). Community Lead for Koin (Kotzilla). Maintainer: MediaPlayer-KMP, Alert-KMP, Flexi Store KMP. Contributor: LibreTube (10k+ stars). What you’ll get: - Clear roadmap and weekly milestones - Measurable performance targets (startup time, crash-free users, revenue KPIs) - Post-release support with docs and handover Next step: Share your goals (feature list, deadline, KPIs). I’ll respond with a mini plan + timeline options tailored to Android-only, iOS-only, or KMP both. Tech Stack: Kotlin Multiplatform, Compose Multiplatform, Android Native, iOS Native (Swift + SwiftUi), Desktop(MacOS, .MSI, linux).

I'm the Android developer who built in-vehicle navigation for Harley-Davidson and a 100,000+ download app with on-device AI. Need the hard parts done, Bluetooth/BLE, on-device AI, or native speed that can't lag? That's my lane. 8+ years, Kotlin-first. See exactly how I work in my Portfolio below: iThing, a live open-source IoT dashboard (99.6% Kotlin, Clean Architecture, Jetpack Compose), and Ambicam, my 100,000+ download surveillance app on Google Play. I also ship cross-platform with Kotlin Multiplatform (KMP), so you get iOS and Android from one codebase. Most clients come to me with one of these: • A Bluetooth/BLE device that pairs but won't stay connected or sync reliably • An app that needs AI running on the device, not a slow round-trip to the cloud • A native Android app that lags, drains battery, or crashes under load • Two separate budgets for iOS and Android when one shared codebase would do SERVICES I PROVIDE BLE & IoT-Connected Apps • BLE / Bluetooth device pairing, reconnection and background sync • Zigbee, TCP/IP and WiFi smart-device integration • Smart-home, wearable, healthcare and industrial IoT apps • Device data synced to your backend over REST API and Firebase • Native hardware integration that no-code tools and AI cannot fake On-Device AI & Computer Vision • On-device ML with TensorFlow Lite (data never leaves the phone) • Face recognition, number-plate / object detection, OCR (OpenCV) • Camera pipelines and real-time inference • Gemini and Claude API integration for cloud LLM features Native Android App Development • Kotlin, Jetpack Compose, Clean Architecture, MVVM, Coroutines, Flow • REST API integration, Firebase, Room, offline-first apps • Performance tuning, JNI/NDK and C/C++ for the critical paths • Automotive-grade, latency-sensitive, real-time systems • Full lifecycle: architecture to Play Store launch Kotlin Multiplatform (KMP) Cross-Platform • One shared Kotlin codebase for iOS and Android (60-95% shared) • Compose Multiplatform for shared UI • Roughly 35-50% cheaper than two native teams • Migrating an existing Android app to KMP PROVEN RESULTS (see for yourself) • iThing, a live open-source IoT dashboard (in my Portfolio): 99.6% Kotlin, Clean Architecture + MVI, Jetpack Compose, Hilt • Ambicam, a 100,000+ download Android surveillance app I built and maintain solo, on Google Play (iOS in Swift too) • In-vehicle navigation for Harley-Davidson (TomTom Navkit): led 5 engineers, 25% latency reduction • On-device face + number-plate recognition (TensorFlow Lite + OpenCV) and native C/C++ live streaming via JNI/NDK • BLE, Zigbee, TCP/IP and WiFi integrations for government-scale tracking and attendance hardware • First Upwork contract closed at 5.0 with all five client-insight endorsements HOW I WORK Communication: I reply within a few hours, give you honest timelines, and tell you the moment something changes. No silent weeks. Quality: Clean architecture, code that respects the Android lifecycle and device memory, tested on real hardware (not just an emulator). Where I fit: A senior Android app developer based in Munich, fluent in English and Hindi, conversational German, comfortable in EU time zones and GDPR-aware by default. TECHNOLOGY Native: Kotlin, Java, Jetpack Compose, Clean Architecture, MVVM/MVI, Coroutines, Flow, Hilt Cross-platform: Kotlin Multiplatform (KMP), Compose Multiplatform AI/ML: TensorFlow Lite, OpenCV, on-device ML, Gemini API, Claude API Native/Perf: JNI/NDK, C/C++, real-time streaming, performance profiling IoT/Hardware: BLE, Bluetooth, Zigbee, TCP/IP, WiFi, smart-device integration What I’m not working on: - Survey forms - Research projects - German-speaking projects LET'S BUILD IT If your project involves a Bluetooth or IoT device, on-device AI, a performance-critical Android app, or a Kotlin Multiplatform build, send me the details. I will reply within a few hours with an honest read on feasibility, the approach I would take, and a realistic timeline. What is the hardest technical part of your app, the piece you are least sure can be done? Tell me that first. - Khyati

AI Engineer and Solutions Architect with 10+ years of experience building scalable SaaS platforms, enterprise systems, and cloud-native applications. Over the past two years, I have been helping businesses integrate Generative AI, Large Language Models (LLMs), AI Agents, Retrieval-Augmented Generation (RAG), and workflow automation into production systems. I specialize in OpenAI, Claude, GPT-4, LangChain, LlamaIndex, Vector Databases, AI Chatbots, AI Search Systems, and enterprise-grade backend architecture using Python, Java, Spring Boot, AWS, PostgreSQL, MongoDB, Docker, and Kubernetes. I help companies move beyond AI demos and build production-ready AI products that scale securely and reliably. Over the last 10+ years, I’ve architected and scaled SaaS platforms, enterprise systems, and cloud-native applications used by startups and growing businesses across healthcare, fintech, logistics, travel, AI, and real estate industries. I specialize in Java, Spring Boot, Microservices, AWS, PostgreSQL, MongoDB, Kubernetes, and scalable backend architecture for high-performance SaaS platforms. Worked on platforms handling real-time workflows, payment systems, enterprise reporting, AI integrations, booking engines, analytics systems, and multi-tenant SaaS infrastructure. I’ve developed enterprise-grade platforms for healthcare, fintech, e-commerce, and real-time applications, focusing on scalability, security, and long-term maintainability. My expertise includes: ✔ High-performance REST APIs ✔ Microservices architecture ✔ Cloud-native AWS deployments ✔ Authentication & payment systems ✔ Enterprise integrations ✔ Performance optimization Whether you need to modernize a legacy Java application, build a backend from scratch, or scale an existing SaaS platform, I can help architect and deliver reliable production-ready systems. My Core Competencies 1. Java Development: - Core Java: In-depth knowledge of Java’s features, collections, concurrency, and multi-threading - Spring Framework: Expertise in Spring Boot, Spring MVC, Spring Security - Microservices: Designing and implementing microservices architecture with Spring Cloud - API Development: RESTful APIs with JWT, OAuth, and GraphQL integration 2. Mobile App Development: - Android Development: Skilled in developing native Android apps using Java and Kotlin - App Lifecycle: From UI/UX design to API integration and deployment 3. Database & Back-End: - Database Expertise: Proficient in MySQL, PostgreSQL, and MongoDB for secure, scalable data management - ORM: Working with Hibernate for object-relational mapping - Server-Side Scripting: Building efficient backends with Java and Spring. 4. Deployment & Cloud: - Cloud Deployment: Expertise in deploying Java-based applications on AWS, Azure, and Google Cloud - Containerization: Proficient with Docker for application containerization and management 5. Security & Performance: - Application Security: Implementing secure systems with Spring Security, OAuth, and data encryption - Performance Tuning: Optimizing application speed, database queries, and server-side performance AI & Generative AI Expertise ✔ AI Chatbot Development ✔ OpenAI API Integration ✔ Claude AI Integration ✔ GPT-4 Applications ✔ AI Agents & Agentic Workflows ✔ Multi-Agent Systems ✔ Retrieval-Augmented Generation (RAG) ✔ AI Knowledge Bases ✔ Enterprise Search Systems ✔ Semantic Search ✔ Embedding Models ✔ Vector Databases ✔ Document AI ✔ AI Workflow Automation ✔ Conversational AI Platforms ✔ AI SaaS Products ✔ LLM Evaluation & Optimization ✔ Prompt Engineering ✔ AI API Development ✔ AI Automation for Business Processes Industries I Serve - E-Commerce: Custom checkout systems, payment gateway integration, and scalable shopping carts - Healthcare: HIPAA-compliant mobile apps and backend systems for patient management - Finance: Developing secure and efficient transaction systems, real-time data processing - Education: Learning platforms and mobile apps to enhance educational experiences - Travel & Hospitality: Building booking engines, itinerary planners, and travel apps - Real Estate: Custom property listings, user-friendly property search apps What I Can Help You Build - SaaS backends - REST APIs - Microservices architecture - Authentication systems - Payment integrations - Cloud deployment pipelines - Enterprise dashboards If you need a reliable backend engineer to build scalable APIs, SaaS platforms, or cloud-native Java applications, let’s discuss your project. Keywords: Spring Boot, Java Backend, SaaS Development, REST API, Microservices, AWS, Scalable Applications, SaaS Architecture, Platform Engineering, Distributed Systems, Event-Driven Architecture, Cloud-Native Development, Enterprise APIs, Multi-Tenant SaaS, AI Integrations, Kubernetes, Docker, Kafka, DevOps, System Design, Scalable Infrastructure, High Availability Systems, Fintech, Healthcare Platforms, Booking Engines, Real-Time Systems

Android Developer with 4+ years of experience building scalable mobile applications using Kotlin, Jetpack Compose, and modern Android architectures. I specialize in native Android development and Kotlin Multiplatform (KMP) solutions. What I bring to your project: - Native Android apps with Jetpack Compose, clean modular architecture, and offline-first patterns - Kotlin Multiplatform (KMP) development — shared business logic across Android & iOS using Ktor, SQLDelight, and Compose Multiplatform - Real-time features with WebSockets, GraphQL (Apollo Kotlin), and push notifications - CI/CD pipelines with GitHub Actions for automated builds and releases - Firebase integration (Crashlytics, Performance Monitoring) for production stability Recent highlights: - Led migration of a ride-hailing platform to KMP, managing a team of 4-6 mobile engineers - Architected a unified KMP SDK monorepo consumed across multiple production apps - Built an award-winning KMM sticker app that placed 2nd in the official Telegram Contest - 4 completed Upwork jobs with 5.0 rating and 100% client satisfaction Tech stack: Kotlin, Jetpack Compose, KMP, Ktor, Apollo Kotlin (GraphQL), SQLDelight, Room, Coroutines/Flow, Retrofit, Firebase, GitHub Actions, Gradle Let's discuss how I can help build or improve your Android application.

🏆 Top Rated | 100% Job Success | 48 Upwork Jobs | $30K+ Earned I build and rescue production iOS and Android applications, including AI-powered fitness, nutrition, streaming, and consumer products. Working with Swift, SwiftUI, UIKit, Kotlin, and React Native, I can take ownership of an app from architecture and feature development through performance optimization and App Store or Google Play release. 𝗔𝗜-𝗣𝗢𝗪𝗘𝗥𝗘𝗗 𝗠𝗢𝗕𝗜𝗟𝗘 𝗔𝗣𝗣𝗦 I’ve built AI-powered mobile experiences including: ✔️ Astream — AI-powered mobile application ✔️ Lose Belly Fat — AI-powered health and fitness app ✔️ Diabetic Vitamix Recipes — AI-powered recipe and nutrition app I handle the complete mobile experience around AI: API integration, user inputs, structured results, loading and error states, responsive interfaces, performance, data handling, and production release. If you need AI added to an existing application, I can integrate it without turning the rest of your app into an unstable experiment. 𝗣𝗥𝗢𝗩𝗘𝗡 𝗨𝗣𝗪𝗢𝗥𝗞 𝗥𝗘𝗦𝗨𝗟𝗧𝗦 ✔️ Completed a $10K, 335-hour mobile app improvement engagement ✔️ Maintained and improved an iOS and Android product across an $8K, 327-hour contract ✔️ Completed an urgent forensic app rescue, security audit, and SDK migration ✔️ Maintained 100% Job Success across 48 Upwork jobs ✔️ Earned 13 Committed to Quality, 7 Clear Communicator, and 6 Reliable endorsements “Zain is a top-tier mobile architect and a true professional.” 𝗪𝗛𝗔𝗧 𝗜 𝗖𝗔𝗡 𝗧𝗔𝗞𝗘 𝗢𝗙𝗙 𝗬𝗢𝗨𝗥 𝗣𝗟𝗔𝗧𝗘 ✔️ Build an AI-powered iOS or Android application ✔️ Add AI features to an existing mobile product ✔️ Rescue an unfinished or inherited codebase ✔️ Diagnose crashes, memory leaks, slow screens, and unstable builds ✔️ Build native features with Swift, SwiftUI, UIKit, and Kotlin ✔️ Develop cross-platform applications with React Native ✔️ Add WebRTC calls, real-time chat, and push notifications ✔️ Integrate Firebase, REST APIs, Stripe, PayPal, and In-App Purchases ✔️ Resolve signing, TestFlight, App Store, and Google Play problems ✔️ Improve MVVM and modular architecture without unnecessary rewrites 𝗔𝗗𝗩𝗔𝗡𝗖𝗘𝗗 𝗠𝗢𝗕𝗜𝗟𝗘 𝗘𝗫𝗣𝗘𝗥𝗜𝗘𝗡𝗖𝗘 My production experience includes healthcare applications with BLE devices, real-time patient data, Twilio chat and video, Core Data, payments, subscriptions, CI/CD, and store-release pipelines. I’m comfortable joining an existing codebase, identifying the real source of a problem, and explaining the solution without unnecessary technical noise. 𝗦𝗘𝗡𝗗 𝗠𝗘 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗛𝗔𝗩𝗘 Send me your App Store link, TestFlight build, repository, designs, or current blocker. I’ll give you an honest assessment of the technical path, the biggest risk, and what I would address first.