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Our production [login to view URL] web app and its companion Flutter mobile app are both showing a similar set of headaches—functionality glitches, sluggish moments, and a few UI/UX hiccups that break the flow. The two platforms are equally affected, so I need a developer who can jump back and forth between React-based [login to view URL] code and Dart-powered Flutter screens without missing a beat. Where the problems surface • Checkout / payment flow stalls or throws unexpected errors • Poster display and video / audio playback occasionally fail to render or buffer correctly • File-upload feature hangs or silently drops the upload What I need from you • Isolate the root causes on both codebases, commit clean, well-commented fixes, and prove they work. • Restore full performance—smooth UI, quick API calls, no memory leaks. • Leave each repo optimised and ready for the next release (build scripts, caching, linting all green). Acceptance The Checkout, poster playback, and file-upload journeys must run end-to-end on web and mobile without errors, lag, or layout issues. I will test on the latest Chrome, Safari, and a mid-range Android/iOS device before sign-off. Tech you’ll touch: [login to view URL] (React 18, SSR with API routes), Flutter 3.x, Dart, REST/GraphQL clients, possibly Firebase and Stripe SDKs. If debugging, profiling, and polishing across both stacks sounds like your thing, let’s get this shipped.
Project ID: 40477360
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105 freelancers are bidding on average $7 USD/hour for this job

Hello We are Ominfowave Software Services Pvt. Ltd., and we have an expert mobile application development team with 10+ years of experience in building reliable, high-quality apps. ? Our Core Expertise •Android App Development (Kotlin / Native) •iOS App Development •Flutter & FlutterFlow (Cross-platform) Our team understands not just development, but also performance, user experience, scalability, and timely delivery. ? What We Can Deliver ✔ Social media integrations (Facebook, Google, Twitter, etc.) ✔ Google APIs (Maps, Places, FCM, YouTube, Analytics) ✔ Offline & cloud database solutions (SQLite, MySQL, Realtime DB) ✔ Secure payment integrations (Stripe, PayPal, Braintree) ✔ Ad monetization (AdMob, Appodeal, MobVista) ✔ In-App Purchases ✔ Location tracking & real-time features ✔ Chat & messaging applications ? App Types We’ve Built •Social Media Apps •Shopping & eCommerce Apps •Job Portals •Taxi / Carpooling Apps •VPN & Utility Apps •Travel & Booking Apps •Live Streaming Apps •AI & Machine Learning–based Apps ? Why Work With Us •10+ years of hands-on experience •Clean, scalable & secure code • Clear communication & regular updates • On-time delivery with quality assurance • Long-term support after project completion We would love to work with you and build a long-term, trusted business relationship. Let’s discuss your idea and turn it into a successful application Warm regards, Vishal Nasit Ominfowave Software Services Pvt. Ltd.
$5 USD in 56 days
8.1
8.1

Hi, I can help you build a high-quality Flutter mobile application with clean UI/UX, fast performance, and scalable architecture. I have strong experience in Flutter app development, API integration, Firebase, custom backend systems, ERP/CRM integration, and eCommerce/mobile solutions. ✅ Cross-platform Android & iOS apps ✅ Clean and responsive UI/UX ✅ API & payment gateway integration ✅ Admin panel & backend support ✅ Fast communication & on-time delivery ✅ Long-term maintenance support I focus on delivering stable, user-friendly, and production-ready applications with complete client satisfaction. Let’s connect and discuss your project requirements in detail. Thanks, Ambient Infotech
$8 USD in 40 days
7.8
7.8

Hi, I would like to grab this opportunity and will work till you get 100% satisfied with my work. I just applied after read your job posting carefully and I believe that I am good fit to your project. I'm a serious bidder. I will satisfy you with my high skills! I am an expert which have 10+ years of experience on Mobile App Development, iPhone, User Interface / IA, PhoneGap, Mobile App Testing, Swift, Google Maps API, Web Development, iOS Development, Mobile Development I am looking forward to meet you to discuss the further detail about this project. Looking forward to hearing from you. Warm Regards
$2 USD in 40 days
5.2
5.2

Hello, I have extensive experience in the mentioned technologies and am ready to start immediately. Let’s connect via chat to discuss the project requirements further. Thank you, Jignesh
$5 USD in 40 days
5.3
5.3

As a seasoned full-stack developer with over 14 years of experience, I have extensively worked with technologies that are crucial to the success of your project such as React.js and Next.js. Not only do I have vast experience with frontend frameworks and languages including HTML5, CSS3, but also with backend frameworks like Node.js and PHP. On top of this, I'm proficient in using Dart which is essential for overcoming the challenges in your Flutter mobile app.
$5 USD in 40 days
5.2
5.2

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
$4 USD in 40 days
4.7
4.7

Hi, I can help you with this project. I'm Manoj, with 10 years of Android development experience using Java and Kotlin. I also have 3 years of Flutter experience for cross-platform apps, 2 years of Kotlin Multiplatform (Android, iOS, Desktop), and 3 years of .NET C# experience. I've worked on mobile apps from development to production, including API integration, architecture design, performance optimization, Firebase, real-time features, and app maintenance. Please share more details about your requirements. I'd be happy to discuss the project and suggest the best approach. Looking forward to hearing from you. Thanks, Manoj
$7 USD in 40 days
1.6
1.6

Hello Dear, I am Jagmohan Kumawat, a multidisciplinary digital expert with 5+ years of experience building luxury websites, mobile apps, digital marketing, automations, intelligent systems and high impact creative assets. My focus is always on delivering results with precision, style and longterm scalability. Signature Excellence • Luxury Websites & Web Systems • iOS & Android Mobile App Development • Custom API Integrations • Advanced Workflow Automation & AI Systems • Salesforce CRM Setup, Flows & Cloud Integrations • Professional Branding & UI/UX • Social Media Content & Digital Strategy • E-Commerce Systems & Automation • Premium Video Creation & Cinematic Editing Technology & Creative Mastery Node.js | React | Laravel | WordPress | PHP | JS | Shopify | Android/iOS | Salesforce Cloud | CRM Automations | REST APIs | Firebase | AI Solutions | Figma | Adobe Suite (Illustrator, Photoshop, Premiere Pro, After Effects) Canva Pro | AutoCAD | Motion Graphics & AI Video | Digital Marketing | Content Writer | SEO/SMO I’m ready to take your project forward with precision, creativity and technical excellence. Feel free to share more details. I will prepare a customize plan for your exact needs. Best Regards Jagmohan Kumawat
$6 USD in 40 days
0.0
0.0

i can fix bugs in your flutter, firebase app with the nextjs (react) admin panel. your bug related to payment (stripe), audio, video playback, file uploads need detailed analysis before solving it. i know how to fix these bugs. i will also do write tests (unit, integration, widget) to test overall flow so that there are no memory leaks. i am a flutter developer with 3+ years of experience (3 apps shipped on the playstore, 5k+ downloads on each), with NextJS Admin panels. let's connect to help you deploy this app to playstore/appstore.
$8 USD in 40 days
0.0
0.0

Hi Dear Client, I carefully read your full project requirements and understand the app workflow, timeline, GitHub process, support terms, and budget conditions. I have experience with React Native (Expo), Firebase, REST API integration, real-time chat, push notifications, and modern mobile UI/UX development. I can professionally develop and integrate: • Authentication & JWT • Startup/Investor Dashboards • Real-time Chat & Notifications • Subscription & Payment Integration • Firebase & Existing APIs • Android & iOS Responsive App I’m comfortable with regular GitHub updates, testing builds, bug fixing, deployment support, and long-term maintenance. I’m confident I can help build your app professionally with clean code and smooth performance. Best Regards, Abdul Latif
$5 USD in 24 days
0.0
0.0

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