Hi, I’m Nesrine, a Flutter developer focused on fixing, improving, and publishing mobile apps for Android and iOS. I help clients with: • Fixing bugs and crashes • Improving UI and layout issues • Adding new features • API integration (REST, Firebase) • Performance optimization • Google Play & App Store publishing I’ve worked on multiple production apps and understand how important stability, responsiveness, and clean code are for mobile projects. I communicate clearly, respond quickly, and stay fully dedicated until the task is completed properly. If your Flutter app needs fixes, improvements, or help getting published, I’m ready to start immediately.

Senior Software Engineer with an M.Sc. in Computer Science and 12+ years of professional experience delivering reliable, high-quality software solutions. I specialize in PHP, Java, Android, Flutter, HTML5, CSS, web development, MySQL, Oracle, and REST/SOAP web services. I have strong expertise in building responsive, clean, and user-friendly websites using modern HTML5 and CSS practices. I focus on writing efficient, maintainable code and ensuring projects are delivered accurately, on time, and to client expectations. Let’s discuss your project and turn your requirements into a successful solution.

I don't just build apps — I build products clients stake their business on. With 3+ years of hands-on Flutter and full-stack development, I've delivered production-grade Android, iOS, and Web apps across FinTech, dating, e-commerce, social platforms, EdTech, and AI — from MVP to app store launch. Whether you're launching a startup or scaling an existing product, I offer end-to-end development: from onboarding flows and real-time chat to secure payments, admin dashboards, and app store deployment. ✅ What I build: 📱 Cross-platform apps (Flutter) for Android, iOS & Web 🔧 Backend APIs with Node.js, Firebase, MySQL & Express.js 💳 Payment systems: Stripe, Razorpay, UPI, BBPS (NPCI) 💬 Real-time chat, video/P2P calling, push notifications 🤖 AI integrations: OpenAI, custom automation, smart features 📊 Admin dashboards, analytics panels, role-based access 🚀 App testing, store submission, and long-term support 👥 Team-supported delivery for faster, scalable outcomes 🛍️ Industries I've shipped in: FinTech · E-Commerce · Dating & Social · EdTech · Health & Fitness · On-Demand Services · B2B SaaS · Media & Monetization · Job Boards · Event Ticketing 🛠️ 𝐓𝐲𝐩𝐞𝐬 𝐨𝐟 𝐀𝐩𝐩𝐬 𝐈 𝐁𝐮𝐢𝐥𝐝: 🤖 AI-powered tools & assistants 🔐 Admin panels & internal systems 🛍️ E-commerce & marketplace apps 📅 Booking & scheduling platforms 🧘 Health & fitness (e.g., calorie trackers) 💼 B2B & utility platforms 🧑‍🎓 EdTech & learning solutions 💬 Messaging & video chat apps 🎥 Media, reels & monetization platforms (subscriptions, coins) 💘 Dating & peer-to-peer apps 🎟️ Event & ticketing systems 💸 FinTech apps (recharge, wallets, bill pay, UPI) 🧑‍🔧 On-demand service apps 📢 Social networking platforms 💼 Job boards & freelancer portals 🗂️ Portfolio & creator tools 💡 Why Clients Stick With Me I communicate early, flag blockers honestly and treat your product like it's my own. Every client review includes words like committed, reliable and true partner — that's not by accident. Clean architecture, intuitive UI, scalable systems — I build products that are not only functional but loved by users. If you want a developer who delivers clean code and actually understands what you are building — send me a message.

I am a tech enthusiast and Software Engineer with over 7 years of experience across several fields. Front-end experience: Flutter (mobile, web) Back-end experience: Python, Firebase, Java, Node.js, C#, Ruby on Rails AI experience: I have hands-on experience building apps that integrate AI capabilities—leveraging machine learning, natural language processing, and generative models to deliver smarter, more adaptive user experiences. I am the co-founder of a Flutter agency, SmartUp Software, where we provide custom software development and staff augmentation services. We've successfully developed and deployed 20+ mobile and web applications. I also developed an award-winning social project called Berrinche, aimed at helping parents and therapists of children with ASD identify the causes of disruptive behaviors and discover effective ways to manage them.

🥇 𝐓𝐨𝐩-𝐑𝐚𝐭𝐞𝐝 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 & 𝐅𝐥𝐮𝐭𝐭𝐞𝐫𝐅𝐥𝐨𝐰 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 5+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | 𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐀𝐩𝐩 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭 ✅ 1𝟓+ 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩𝐬 published on Google Play and App Store. ✅ 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞 on Upwork ✅ 𝐅𝐚𝐬𝐭 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧, 𝐎𝐧-𝐓𝐢𝐦𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲, 𝐂𝐥𝐞𝐚𝐧 𝐂𝐨𝐝𝐞 Are you a startup founder, product owner, or tech team looking to launch a high-quality mobile app — quickly and affordably? I help clients like you turn product ideas into launch-ready apps using 𝗙𝗹𝘂𝘁𝘁𝗲𝗿 and 𝗙𝗹𝘂𝘁𝘁𝗲𝗿𝗙𝗹𝗼𝘄 — with clean architecture, fast delivery, and long-term scalability in mind. 🔧 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐁𝐮𝐢𝐥𝐝 𝐅𝐨𝐫 𝐘𝐨𝐮: 🏦 𝗙𝗶𝗻𝘁𝗲𝗰𝗵 𝗔𝗽𝗽𝘀 – Secure, scalable banking & investment platforms 🚀 𝗠𝗩𝗣𝘀 – Get your product to market fast with Flutter or FlutterFlow 📱 𝗦𝗼𝗰𝗶𝗮𝗹 & 𝗘-𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗲 𝗔𝗽𝗽𝘀 – Modern UI, performance optimized 🔒 𝗛𝗜𝗣𝗔𝗔-𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝘁 𝗮𝗽𝗽𝘀 – For healthcare & telemedicine use cases 🌍 𝗠𝘂𝗹𝘁𝗶𝗹𝗶𝗻𝗴𝘂𝗮𝗹 & 𝗟𝗼𝗰𝗮𝘁𝗶𝗼𝗻-𝗯𝗮𝘀𝗲𝗱 𝗮𝗽𝗽𝘀 – GPS, maps, i18n ready 🛠 𝐂𝐨𝐫𝐞 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 & 𝐒𝐤𝐢𝐥𝐥𝐬: 𝗙𝗹𝘂𝘁𝘁𝗲𝗿 & 𝗗𝗮𝗿𝘁 – Fast cross-platform native development 𝗙𝗹𝘂𝘁𝘁𝗲𝗿𝗙𝗹𝗼𝘄 – Low-code builder with custom logic 𝗙𝗶𝗿𝗲𝗯𝗮𝘀𝗲 & 𝗦𝘂𝗽𝗮𝗯𝗮𝘀𝗲 – Real-time DB, Auth, Storage, Functions 𝗔𝗣𝗜 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 – Stripe, Twilio, Sendgrid, custom backends 𝗦𝘁𝗮𝘁𝗲 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 – Riverpod, Bloc, Provider, GetX 𝗖𝗜/𝗖𝗗 & 𝘃𝗲𝗿𝘀𝗶𝗼𝗻 𝗰𝗼𝗻𝘁𝗿𝗼𝗹 – Git, GitHub Actions, Bitbucket ✅ 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐋𝐨𝐯𝐞 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐖𝐢𝐭𝐡 𝐌𝐞 Transparent communication & proactive updates 6+ years of experience in startups and global teams Focused on 𝗿𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆, 𝘀𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆, and 𝗰𝗹𝗲𝗮𝗻 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 Long-term collaboration mindset — I grow with your product 📩 𝐋𝐞𝐭’𝐬 𝐭𝐚𝐥𝐤! Whether you're starting an MVP or scaling your app, I’m here to help you build fast and smart with Flutter..

Hi, I’m a dedicated Android & iOS developer with 3 years of experience building practical, user-friendly apps. I specialize in Java, Kotlin and the Android SDK, and I follow best practices using MVVM architecture, Firebase, and REST APIs. 😎 In addition to native Android development, I have strong experience in cross-platform app development using Flutter and FlutterFlow. I’ve built and deployed scalable apps for both platforms, integrating Firebase services like Authentication, Firestore, Cloud Messaging, and Analytics to power real-time, secure, and engaging user experiences. Tech stack/Latest experience: ✅ Flutter: Cross-platforming development of IOS/Android applications. ✅ Android: Crafting seamless and intuitive mobile experiences for the Android platform. ✅ React & Angular: Designing responsive and feature-rich web applications using popular frontend frameworks. ✅ Java 17: Harnessing the power of Java to build robust and scalable mobile applications. ✅ Kotlin: Utilizing Kotlin's modern features for efficient Android development. ✅ Spring & Spring Boot: Developing scalable and high-performance web applications with the Spring framework. ✅ REST: Building RESTful APIs for seamless communication between web services. ✅ Quarkus: Leveraging Quarkus for lightweight and fast Java-based microservices. ✅ Kafka: Implementing event-driven architecture for real-time data processing and streaming. It would be great to speak more with you and receive the necessary info about the rapid job with short timeline or comprehensive and high-complexity long-term project. Now I am expanding my portfolio, a lot of works under NDA – so for now I need to create an Upwork portfolio – and apply my 10+ years high-level experience 🤩 Let's have a quick talk and discuss everything! 🤝

I’m Ali Hassan, a passionate Flutter Developer with 2+ year of hands-on experience building and deploying cross-platform mobile apps and web applications for Android and iOS. I specialize in: Cross-Platform Mobile Development: Flutter apps that run seamlessly on Android and iOS Backend & Cloud Solutions: Firebase (Authentication, Realtime Database, Firestore, Storage, Cloud Functions) API Integrations: REST API, JSON, third-party services UI/UX Development: Clean, responsive, and user-friendly app designs Web Apps: Flutter web development with modern, scalable architecture Why clients choose me: Proven track record of delivering high-quality apps that meet client needs Strong knowledge of Dart, Java, Android SDK, and iOS app workflows Ability to write clean, maintainable, and scalable code Commitment to on-time delivery and excellent communication Whether it’s a custom business solution, e-commerce app, food delivery system, or real-time mobile app, I can turn your idea into a reliable product. Let’s build your next Flutter mobile app or web application with the power of Firebase and REST APIs.

I help startups and businesses launch cross-platform mobile apps that scale with fast, secure, and user-friendly. I'm Sagar R. Anghan, a Senior Flutter and Cross-Platform Mobile App Developer with nearly five years of focused Flutter experience and one year in native Android development. I hold a Bachelor’s degree in Computer Application and have delivered production apps across e-commerce, education, healthcare, IoT and AI-assisted solutions. My work emphasizes performance, maintainability, and measurable business outcomes. Core Expertise • Cross-platform mobile development with Flutter (iOS, Android, Web) • Native Android fundamentals (Java) and full mobile app lifecycle • State management & architectures: Bloc, GetX, MobX, Provider, RxDart, MVP • Backend & integrations: Firebase, REST APIs, Spring Boot • UI/UX implementation: Responsive design, Material theming, accessibility • CI/CD, automated testing, and play store & app store deployment Typical Projects & Industries • E-commerce: Shopping apps, catalog & cart systems, secure payment integrations, checkout optimization • HealthTech: HIPAA-conscious data handling patterns, appointment & records management, telemetry dashboards • EdTech: Multimedia learning apps, progress tracking, classroom and content-delivery workflows • IoT & AI-enabled apps: Device integrations, real-time telemetry, model inference integration for smarter experiences • Social and utility apps with maps, location services, push notifications, social logins, and analytics Features & Integrations I Deliver • Social authentication (Google, Facebook, Twitter), secure token handling and refresh flows • Push notifications, in-app messaging, background sync and offline first strategies • Maps (Google/MapBox/OpenStreetMap), geofencing, and location-based features • Payment gateway integrations and PCI-aware design patterns • Bluetooth/IoT device connectivity and data synchronization • Performance tuning: app startup time, memory & CPU profiling, crash reduction strategies Approach & Outcomes • I begin with requirements and success metrics so every technical decision maps to business outcomes. • Focus on maintainability: modular code, automated tests, and clear architecture to reduce technical debt. • My projects target measurable improvements such as faster load times, lower crash rates, improved retention, and smoother conversion funnels. I share concrete case metrics and before/after comparisons in proposals and portfolio items. Engagement & Availability • I work on hourly and fixed-price contracts, and I’m open to short pilots or contract-to-hire arrangements. • I provide clear timelines, regular status updates, and technical documentation. • I offer an initial consultation or code review to scope projects and identify quick wins. If you need a dependable Flutter developer who delivers production-grade apps and measurable business impact, let’s talk. Share your project summary and desired outcomes. I'll propose a technical approach, timeline, and next steps.

Need a Flutter developer who can turn your app idea into a polished mobile product? I'm a Flutter Developer with 3 years experience I mainly do front-end development but I have my fair share of backend development aswell. I can also create prototypes using Figma when needed. Here is what I helped create through my entire career: A) AI Business Mentor app B) Choir App C) Ecommerce app for motorcycles D) Employee timetracker app E) Hotel Booking App I focus on delivering clean code, clear communication, and reliable results. Whether you need a new application built from scratch, feature development, bug fixes, UI improvements, or ongoing maintenance, I am committed to helping bring your project to life.

A talented Mobile (Android Native) (Hybrid Flutter) Developer here who is developing apps for the last 5 years. I've developed some apps with great User Interface and functionality, following best programming patterns and practices. I develop applications on Android using both java and kotlin programming language, while using dart to build Flutter applications Command on other technologies include : - MVVM - Graph QL - gRPC - REST - Firebase - In-app purchases - Revenue Cat - 0 Auth - Push Notifications - Code Magic - AWS Amplify - Upload Apps on Stores - GetIt - Provider - Bloc - Stacked