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Optimize and fix performance issues in an existing Flutter mobile application for Android and iOS. Tasks include improving app speed, reducing lag, fixing UI/rendering issues, debugging crashes, optimizing API and state management performance, and preparing production builds for deployment. Experience with TestFlight, Apple App Store, and Google Play Store publishing, release management, Firebase integration, and production-ready Flutter applications.
Project ID: 40433705
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Active 2 days ago
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36 freelancers are bidding on average ₹9,081 INR 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.
₹10,000 INR in 7 days
8.3
8.3

Hi, I’m an experienced Flutter developer with strong expertise in optimizing and maintaining production-ready Android & iOS apps. I can improve app performance, fix UI/rendering issues, reduce lag, debug crashes, optimize API/state management, and prepare stable release builds. I also have hands-on experience with Firebase, TestFlight, App Store, and Google Play Store deployment and release management. I can start immediately and deliver clean, efficient results.
₹15,000 INR in 7 days
7.8
7.8

Hi, I’m Abhishek Rathore, a senior Flutter engineer. Your app needs performance fixes, UI/rendering cleanup, crash debugging, and smooth TestFlight/Play Store deployment—I can handle this end to end. ? Approach I’ll profile the app using Flutter DevTools and Firebase Performance to locate frame drops and bottlenecks. Then refactor heavy widgets, optimize rebuilds with proper state management (Riverpod over setState where needed), and streamline API calls with caching and isolates for background work. ✅ Core Features • Fix UI jank and rendering inconsistencies • Reduce app startup time and frame drops • Debug and resolve crashes (Firebase Crashlytics) • Optimize API latency and state flow • Clean build configs for iOS/Android releases • Setup TestFlight & Play Store deployment ☁️ Reliability / Performance Focus on 60fps stability, minimal widget rebuilds, and efficient JSON parsing. I’ll enforce proper lifecycle handling and test edge cases like low-memory devices and network failures. ? Deliverables Optimized codebase, stable builds, deployment-ready binaries, and store submission support. ? Why Me Built and scaled apps like Rhythm with similar performance fixes and store releases. Do you already use a structured state management solution, or is it mostly setState today?
₹8,125 INR in 5 days
6.6
6.6

Hello, Im experienced flutter developer and I will publish your app on playstore and AppStore without any issue, pls dm me to start work. Thanks
₹7,000 INR in 7 days
5.4
5.4

Hi, I can help optimize and stabilize your existing Flutter application for Android and iOS, including TestFlight and Google Play Store deployment. I can assist with: • App speed optimization and lag reduction • UI/rendering issue fixes • Crash debugging and stability improvements • API and state management optimization • Firebase integration validation • Production build preparation and release deployment I’ve worked on Flutter apps involving Firebase, REST APIs, production releases, and performance tuning. I understand common issues like unnecessary widget rebuilds, API bottlenecks, memory usage problems, and inefficient state handling. My approach: • Analyze performance bottlenecks • Optimize rendering and API flow • Fix crashes and release issues • Prepare Android/iOS production builds • Handle TestFlight and Play Store deployment A few quick questions: 1. Which state management solution are you using? 2. Are crash logs available via Crashlytics or Sentry? 3. Is this a new deployment or an existing published app? Best regards, Davinder
₹7,000 INR in 7 days
5.6
5.6

As someone with a decade-long experience as a full-stack developer and comprehensive know-how of the Flutter framework, I'm confident that I am the perfect fit for optimizing the performance of your existing mobile application. I specialize in solving lagging issues, improving speed, debugging crashes, and fixing UI/rendering problems, precisely what's needed to enhance your app's performance. My expertise also extends to API and state management optimization, which will help streamline your application further. In addition to these coding proficiencies, I've got hands-on experience with TestFlight, Apple App Store, and Google Play Store publishing. This makes me fully-equipped to handle all aspects of deployment including build preparation, publishing and release management on both platforms. Lastly, my familiarity with Firebase integration will prove invaluable for ensuring smooth operation and high reliability even throughout robust usage. By choosing me for this project, you get more than just a developer; you get a partner who is committed to delivering scalable, secure and efficient solutions that align perfectly with your business needs. I believe my skills and track record speak volumes about my capabilities. Let's collaborate to optimize your app to its full potential!
₹9,999 INR in 7 days
5.1
5.1

Hello, I can help you to optimize your existing Flutter application by improving performance, reducing UI lag, fixing rendering and crash issues, and optimizing API/state management for a smoother user experience on both Android and iOS. I also have hands-on experience with Firebase integration, TestFlight, App Store & Play Store deployment, and preparing stable production-ready builds with proper release management. I’ve worked on Flutter apps focused on scalability and performance, and I can quickly identify bottlenecks to ensure your application runs efficiently across devices. Looking forward to discussing your project further. Regards Abhishek
₹7,000 INR in 7 days
5.5
5.5

As a dedicated developer and head of a web and mobile app development company, I am confident that I can bring immense value to your project. With over 9 years of experience in the field, I have successfully optimized various e-commerce sites and CMS-based applications for high performance, and am familiar with all the task requirements mentioned in your project. My deep proficiency in Flutter, Google Firebase, Laravel, Mobile App Development, and Node.js positions me perfectly to address your app's speed, rendering issues, state management performance and API issues. My experience also extends to TestFlight, Apple App Store and Google Play Store deployment which demonstrates familiarity with the full app development cycle. Moreover, I am truly committed to provide not just a solution but an optimized solution within effective cost and undeniable quality. The fact that we offer free 3 months support for existing development testimony attest to that commitment. It is without doubt that when it comes to turning ideas into reality; we will deliver. So let's turn your Flutter application into a high-performing reality prefect for both Android and iOS devices!
₹15,000 INR in 7 days
5.4
5.4

I'm Himanshu, and I have been in the business of building and optimizing applications for over five years. Throughout my career, I have consistently excelled in streamlining the performance of apps, reducing lag, fixing UI/rendering issues, debugging crashes, and above all else - preparing production builds for deployment. I understand how vital these optimization aspects are to ensure the seamless functioning of your mobile application. Moreover, as someone who has extensive experience with TestFlight, Apple App Store, and Google Play Store publishing as well as release management,I am confident that I can handle this task efficiently for you. In addition, my familiarity with Firebase integration ensures that your production-ready Flutter application will be error-free and reliable. Not only do I specialize in developing high-performance applications like yours but also in maximizing their delivery potential. My profound knowledge in Node.js allows me to create RESTful APIs seamlessly fostering a smooth information flow between different components of your system. Let's expedite delivery, reduce lag, fix bugs and improve overall quality together!
₹12,000 INR in 7 days
3.7
3.7

Most Flutter apps feel “done” before launch, but performance drops, random crashes, and platform-specific rendering issues usually start showing up only under real user usage. That’s normally the stage where the real engineering work begins. I can help stabilize and optimize your existing Flutter app for both Android and iOS with a production-focused approach. -> Fix lag, frame drops, and unnecessary rebuilds -> Optimize API calls, caching, and state management flow -> Debug crashes, memory leaks, and rendering issues -> Improve startup time and overall app responsiveness -> Prepare clean production builds for App Store and Play Store -> Handle Firebase, TestFlight, release management, and deployment I’ve worked on large-scale Flutter apps where the biggest challenge was not building features, but making the app stable, fast, and production-ready across real devices. A few quick things I’d like to check first: -> Which state management approach is currently used? -> Are crashes already tracked through Firebase Crashlytics or another tool? -> Is the lag happening globally or on specific screens/workflows? -> Are you using Flutter stable channel or a custom setup? I can start immediately and help reduce the back-and-forth by handling both debugging and release preparation end-to-end.
₹7,000 INR in 7 days
2.9
2.9

Hi, I can help optimize and stabilize your existing Flutter application for both Android and iOS with focus on performance, UI smoothness, crash fixing, and production readiness. The work can include: • App speed and rendering optimization • Lag and memory usage reduction • UI/animation fixes • API and state management optimization • Crash debugging and stability improvements • Firebase integration review and cleanup • TestFlight and Play Store production build preparation • Release management and deployment support I’m comfortable working with production Flutter apps, debugging complex issues, optimizing app performance, and handling App Store / Google Play release workflows. Ready to review the current app structure and start with the highest-priority performance issues first.
₹7,000 INR in 7 days
2.3
2.3

As an experienced full-stack developer with a specific focus on mobile app development, I have accumulated valuable skills and expertise that make me the perfect fit for your project. Your request for optimizing and fixing performance issues in your Flutter mobile app aligns seamlessly with my knowledge and capabilities. Not only can I enhance the speed of your application, but I can also troubleshoot to fix any UI/rendering issues or crashes, optimize API and state management performance - all key areas you need assistance with. But that's not all - you will also benefit from my prior experience in deploying applications on TestFlight, Apple App Store, and Google Play Store. My familiarity with release management and Firebase integration will ensure a smooth process right through to production. Furthermore, my proficiency in Node.js adds an extra layer of strength to your project as it harmonizes well with Flutter for seamless performance. Lastly, choosing me means choosing a partner with a relentless commitment to excellence. With every task I undertake, be it optimization, bug fixing or deployment, my aim is never just to 'get it done', but rather to deliver results that drive growth and success for your business. Let's transform your current tech headaches into a high-performing solution that shines on time, every time!
₹9,999 INR in 7 days
0.6
0.6

Hi, I'd be happy to assist with optimizing and deploying your Flutter application for both Android and iOS. I'm experience in Flutter app optimization, crash debugging, UI/rendering fixes, API performance improvement, Firebase integration, and production deployment workflows for both TestFlight/App Store and Google Play Store. I can help with: • Performance optimization and lag reduction • UI/rendering issue fixes • Crash debugging and stability improvements • API & state management optimization • Firebase integration and configuration • Android & iOS production build setup • TestFlight, App Store & Play Store deployment support I also have experience working with Node.js, Laravel, REST APIs, MongoDB, and scalable full-stack architectures, which helps in resolving backend-related performance bottlenecks as well. I’d love to discuss your current app structure, existing issues, and deployment requirements in more detail. Best regards, Deepak
₹7,000 INR in 7 days
0.0
0.0

Hi there,I am a senior full-stack developer with extensive experience in Flutter optimization and end-to-end deployment. I can resolve your performance bottlenecks and manage the entire submission process for TestFlight and the Play Store. Why me: Optimization: Expert in reducing junk, optimizing build methods, and improving app startup times for a smooth UI. Deployment: Deep experience managing App Store Connect and Google Play Console, including certificates, metadata, and compliance. Proven Track Record: I’ve successfully delivered high-performance platforms like Bebetta and specialized retail solutions likeSouq LG. I am ready to audit your codebase and get your app production-ready immediately. Best regards, Shailender
₹10,000 INR in 8 days
0.0
0.0

Vanakkam! I just wanted a project to work on. I have previously worked on production environments and fixed the performance issues by running profilers and instruments. Happy to help
₹7,000 INR in 7 days
0.0
0.0

Let's connect for this exciting project and take your Flutter mobile application to the next level. As an experienced Flutter developer, I have a highly honed set of skills and a consistent track record of delivering optimized apps that run seamlessly on both Android and iOS platforms. My solid command over state management and API integration ensures that not only your rendering issues and UI inefficiencies will be addressed, but also, the app speed will be enhanced to provide a smooth user experience. In addition to my development expertise, I have an extensive knowledge of deploying apps on TestFlight, Apple App Store, and Google Play Store. This familiarity with the intricacies of publishing, release management, and Firebase integration provides an added advantage as it ensures a hassle-free deployment process for you. What differentiates me is my holistic approach. I am not just limited to fixing bugs or optimizing performance; I offer comprehensive end-to-end support that includes proper hosting setup as well. I am genuinely passionate about helping businesses like yours grow by building robust and scalable apps tailored specifically to their needs. Let's collaborate on this project and create an impactful product together!
₹3,000 INR in 3 days
0.0
0.0

Flutter App Performance Optimization & Bug Fixing Your budget is perfect for me – I can optimize your existing Flutter app for both Android & iOS and make it production-ready with smooth performance and stable releases. I have 5+ years of experience in Flutter development, including performance optimization, Firebase integration, crash fixing, API optimization, and App Store/Play Store deployments. ? What I’ll Deliver ✔️ App speed & lag optimization ✔️ UI/rendering issue fixes ✔️ Crash debugging & stability improvements ✔️ API & state management optimization ✔️ Firebase integration & production configuration ✔️ TestFlight & Play Store release management ✔️ Production-ready Android & iOS builds Many more as per your needs... Please connect for further discussion.
₹7,000 INR in 7 days
0.0
0.0

With over 5 years of experience in Flutter app development and a proven track record of creating innovative and high-quality mobile applications, I believe I would be a valuable addition to your team.
₹10,000 INR in 7 days
0.0
0.0

I’m Gurpreet Singh, a professional freelance developer based in New Delhi, with 10+ years of experience in delivering secure, scalable, and high-performance digital solutions. I help startups and businesses turn their ideas into powerful, market-ready products. ? What I Can Do for You Mobile App Development (Android & iOS) Desktop Software Development (C#, Java, .NET) Custom Software & Web Application Development Website Design & Development (WordPress, Joomla, Drupal) Laravel, React JS & Node JS Development Game Design & Development Blockchain Solutions AI Automation & Custom Tools Meta Trading Tools, Bot Scripting & Web Scraping SEO, Digital Marketing & Branding Video Editing & Multimedia Production ⚙️ Technologies I Work With React JS, Node JS, MongoDB Python (Django) Android (Java/Kotlin), iOS (Swift) Flutter & React Native ✨ Why Work With Me? ✔ 10+ years of proven industry experience ✔ Modern, scalable & cost-effective solutions ✔ Creative and experienced development approach ✔ Transparent communication & smooth workflow ✔ Secure, optimized & future-ready technology ✔ On-time delivery with dedicated support ✔ Flexible pricing (open to discussion) ? Let’s Work Together If you’re looking for a reliable freelancer who can bring your ideas to life and deliver high-quality results — I’m here to help. Let’s build something amazing together ?
₹2,000 INR in 7 days
0.0
0.0

hey, I reviewed your requirement for optimizing and fixing performance issues in your existing Flutter application for Android and iOS. I have experience working with Flutter applications involving API integration, Firebase, state management, realtime features, authentication systems, and production-level mobile app architecture. I can help improve app speed, reduce UI lag, fix rendering issues, debug crashes, and optimize overall application performance for a smoother user experience. I also have practical experience with production builds, Play Store deployment workflows, and app testing processes, including a Flutter application currently in the internal testing stage on the Google Play Store. I can assist with release optimization, TestFlight/App Store preparation, Firebase setup, and ensuring the application is stable and production-ready across Android and iOS devices.
₹10,000 INR in 4 days
0.0
0.0

Chennai, India
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