Flutter App Upgrades & Bugfixes(lifetime)

@mrresearcher99

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert

@softwarelinkerrs

As an established software agency, we understand the importance of clean, efficient code and the value of comprehensive customer support—two things you're clearly seeking for your project. I am experienced in your platform of choice, Flutter, and can expertly navigate Git repositories. Alongside our mobile app development forte, we offer PHP backend capabilities that would seamlessly integrate with your vision for user authentication and in-app purchases. A notable portion of my work includes creating RESTful APIs for mobile applications and web platforms, which perfectly aligns with your need to enable push notifications through Firebase Cloud Messaging. Moreover, I'm well-versed in dealing with performance slowdowns and delivering accurate UI fixes—essential requirements you've outlined too. With a solid 4.9-star rating and client satisfaction record, I guarantee a comprehensive solution to your needs. From thoroughly commenting each commit to producing clear APK and IPA test builds—a testament to running identically on Android and iOS—I prioritize providing you with nothing less than exemplary results. Let's connect to discuss how my team can enhance your Flutter app now!

@WebSpotIt

With 8+ years of experience in the IT field and as a Flutter and Android specialist for more than half of that time, I'm confident that I'm capable of managing your project flawlessly. My skill set includes not only proficient knowledge in Flutter and Android but also in various API integrations such as Google, Facebook, Paypal, Stripe, Twitter as well as Firebase Cloud Messaging which seems crucial for your requirement. What makes me different is not only my expertise but also my effort to understand each client's needs and making sure the solution provided fits perfectly. I've been given the role of a lead developer and completed more than 150 large projects during my industry tenure. Not just within a team, but even as an individual worker I have handled more than 20 international clients successfully who are spread across Europe and America. Since we're working with a clean codebase (provided by you), my role will be primarily concentrated on adding extra functionality, resolving bugs & inefficiencies, feature integrations, and preparing test builds at every milestone. It's crucial to maintain consistent communication throughout the process to ensure progress and understanding, which is why daily chats, exchanging documents, and sharing immediate updates isn't just beneficial but vital for delivering a top-quality result.

@shivam981994

Hi, I can help you enhance and polish your existing Flutter app quickly and cleanly. I have solid experience working on live Flutter codebases — adding authentication, implementing in-app purchases (consumables + subscriptions), integrating Firebase Cloud Messaging for all app states (foreground/background/killed), and optimizing performance (startup time, list lag, UI flicker issues). What I’ll deliver: • Clean, well-structured commits • Working APK & IPA test builds • Short changelog of improvements • Full compatibility with latest stable Flutter SDK (Android & iOS) Once you share the repo, I can review the architecture and give you an exact timeline. Let’s get this done smoothly and professionally.

@Ak230598

Hello, I CAN DO THIS. I have 6.5+ years of experience in this field. Let's connect and discuss more about your requirements. Thank you.

@adityapandia32

I can upgrade and stabilize your existing Flutter codebase by adding secure authentication, in app purchases, reliable Firebase push notifications, and performance optimizations while keeping full compatibility with the latest stable Flutter SDK. I will work directly on your current architecture, ensuring persistent sessions, smooth purchase flows for both consumables and subscriptions, and proper notification handling across foreground, background, and terminated states on both Android and iOS. Alongside feature work, I will address startup lag, scrolling performance, and UI alignment issues to deliver a cleaner and more responsive user experience. You will receive well structured commits in your Git repository, updated source code, test builds for Android and iOS, and a concise changelog covering all fixes and improvements. I focus on clean implementation and long term maintainability, so the upgraded app remains stable and easy to extend after delivery. Once you share repository access and the walkthrough, I can begin immediately and keep progress clear through structured updates.

@Kishoreindia

Dear Sir/Madam, I am Kishore Patidar, a professional Mobile App and Python Developer with strong experience in building scalable, production-ready mobile applications and backend systems. I specialize in Flutter (cross-platform), Android (Java/Kotlin), Firebase, Supabase, Node.js, FastAPI, and Django. I have successfully delivered multiple live apps on both Google Play Store and Apple App Store, including fintech, healthcare, education, social networking, and on-demand service platforms. My expertise includes: • Cross-platform mobile app development (Flutter) • Backend API development (Node.js, FastAPI, Django) • Payment Gateway integration (PhonePe, Razorpay, Stripe) • Real-time chat & notification systems • Admin panel & dashboard development • App deployment & store publishing • Secure authentication & role-based systems I focus on clean architecture, scalable backend design, optimized performance, and smooth user experience. From idea to deployment, I can handle complete end-to-end development. I would be happy to discuss your project requirements and deliver a reliable, high-quality solution within timeline. Looking forward to working with you. Best Regards, Kishore Patidar Mobile App / Python Developer

@Ussama91

I will add user authentication, wire up in-app purchases, enable push notifications, and resolve performance issues in your existing Flutter codebase, providing updated source code, test builds, and a changelog, adapting to your budget and ensuring compatibility with the latest stable Flutter SDK on both Android and iOS. Waiting for your response in chat! Best Regards.

@hrsydv27

Hello, I can enhance and polish your existing Flutter codebase while keeping it clean, stable, and fully compatible with the latest stable Flutter SDK. What I’ll Implement ✔ Secure Authentication * Email/password or Firebase Auth integration * Persistent sessions (auto-login) * Proper token handling for both Android & iOS ✔ In-App Purchases * Consumables + subscriptions * StoreKit (iOS) & Google Play Billing integration * Receipt validation & purchase restoration ✔ Push Notifications * Firebase Cloud Messaging setup * Reliable handling in foreground, background & terminated states * Proper notification routing & deep linking ✔ **Performance & UI Optimization** * Reduce startup time * Optimize list rendering & scrolling performance * Fix UI misalignment & flicker issues * Refactor heavy widgets and improve state management if needed --- Deliverables ✔ Clean, well-commented commits in your Git repo ✔ Test builds (APK & IPA) showcasing all features ✔ Short changelog explaining improvements & fixes ✔ Project builds cleanly on latest Flutter stable I’ll focus on stability, smooth UX, and production-grade implementation so the app feels polished and reliable on both platforms. Ready to review your repository and begin.

@growwithgdp

✅ Implement secure authentication (Firebase/Auth0) with persistent sessions (Android & iOS) ✅ Integrate in-app purchases (consumables + subscriptions) with proper receipt validation ✅ Configure Firebase Cloud Messaging for foreground, background & terminated states ✅ Optimize startup time, list rendering, and fix UI flicker/alignment issues ✅ Clean commits, test APK/IPA builds & detailed changelog provided

@sakshamp94

Hi, I’d be happy to enhance and polish your existing Flutter codebase. I have strong experience implementing secure authentication (with persistent sessions), integrating in-app purchases for both consumables and subscriptions, and setting up Firebase Cloud Messaging with reliable foreground, background, and terminated-state handling on Android and iOS. Beyond adding features, I’ll focus on performance optimization—reducing startup time, improving list rendering efficiency, and resolving UI misalignment and flicker issues to ensure a smooth, consistent experience across platforms. All changes will be delivered with clean, well-structured commits, updated source code compatible with the latest stable Flutter SDK, along with APK and IPA test builds and a concise changelog.

@keaganmini

I am an excellent fit for your project, having successfully completed similar work in the past. Your need for clean, professional, and user-friendly enhancements like secure authentication, seamless in-app purchases, and integrated push notifications aligns perfectly with my expertise. I understand the importance of automated session persistence and resolving performance slow-downs to improve startup times and UI responsiveness. Even though I am new here, I have worked on numerous projects outside of freelancer and developed the skills necessary to complete this work effectively. My Flutter development experience ensures well-commented code, clean commits, and thorough testing for both Android and iOS. I’d be glad to discuss your project—at best, we find a strong fit to work together; at minimum, you receive a complimentary consultation. Regards, Keagan

@ayas365

I am a perfect fit for your project to enhance your Flutter app with secure user authentication, in-app purchases, push notifications, and improved performance. Your need for a clean, professional, user-friendly, and seamless experience, along with integrated and automated features, is clear. I offer expertise in Flutter development, Firebase integration, and performance optimization. While I am new to freelancer, I have tons of experience and have done other projects off site. I would love to chat more about your project! Regards, Aya

@ihorz5

Hi there, I’m confident I can extend and optimize your existing Flutter codebase while keeping it clean, stable, and production-ready on both Android and iOS. I will implement secure authentication with persistent sessions, integrate in-app purchases for consumables and subscriptions using the official store APIs, and configure Firebase Cloud Messaging to reliably handle foreground, background, and terminated-state notifications. At the same time, I’ll profile and refactor performance bottlenecks to reduce startup time, smooth out list rendering, and eliminate UI misalignment or flicker through layout and state management improvements. All changes will be delivered in well-structured commits with clear documentation, along with test builds demonstrating each feature working end-to-end on the latest stable Flutter SDK. I’d be happy to review your repository and architecture walkthrough to outline the execution plan in detail. Thanks.