Revamp Flutter/MERN Legacy App: Senior Full-Stack Developer

@ykarora26

With 5+ years of MERN expertise, I understand the urgency to update Gurash's Flutter frontend and MERN backend, ensuring seamless Firebase and Maps integration. Could you share the current project repository for a detailed analysis? Regards, Yogesh Kumar

@Microlent

Hi, this looks straightforward at first, but in my experience there’s usually a key detail that can cause issues later. I’ve handled similar projects before and can outline a practical approach for you. For similar work and case studies, feel free to check my profile: https://www.freelancer.com/u/microlent Let me know if you'd like me to walk you through the plan. ~ Rajesh

@seefattechnologi

MEAN/MERN EXPERT -------I believe I can do this project in an efficient and professional manner. I am highly proficient to work on this project . I am Passionate Flutter/ Mobile app Full stack developer having rich experience with all the latest technologies with so many successful Tasks. I have some queries to give you accurate time and price Please ping me to get started and provide you great results. Thanks

@einnovention

Asif and the skilled team at Einnovention are prepared and eager to revamp your dated Gurash app. With over [Insert Years] of full-stack experience and specific fluency in the MERN stack, we are more than qualified for your needs. In fact, our profound MongoDB expertise allows us to adeptly address your app's outdated dependencies. Further, we've worked extensively with Firebase including Auth, Firestore, and Cloud Messaging, making us well-suited for fixing your Firebase and Map integrations to sync properly with the new SDKs. Additionally, our experience with Legacy Code, as well as the recent versions of Flutter makes migration a breeze for our team. No location boundaries stop us from delivering top-notch service - we've satisfied clients globally. It is our company ethos to provide free consultations before initiating a project, unlimited revisions until your satisfaction is met, free support post-delivery exceeding 2 weeks as well as maintaining a transparent communication providing clear milestones and reliable delivery. I believe my skills complemented by my team's skills can be put to good use in rejuvenating your app! Ready to dive in immediately and fueled by an unflinching commitment towards quality, I am positive I will not only fix the stubborn "Access Denied" or "Gradle Sync" errors but also perform a meticulous audit testing to ensure that functioninguncated

@managersingh

Hello I can revive Gurash by resolving your Flutter build errors and migrating the legacy codebase to the latest stable version. I will update your MERN backend dependencies and reconfigure Firebase and Map SDKs to ensure full functionality. I specialize in handling Gradle sync issues and legacy migrations, ensuring your app is audit-ready and deployable within your required timeframe. 1. Years of experience with MERN: 8years 2. Technologies: • MongoDB: Yes, 8 years • Firebase: Yes, 8 years • Maps API: Yes, 8 years • Flutter Migration: Yes, 8 years 3. Country: India 4. Team or Solo: Small team Best regards, Singh

@eliaa

Hello, I see you're looking to fix and revive a legacy Flutter/MERN app which requires a precise balance between frontend finesse and backend resilience. Often, legacy apps suffer from architectural debt that can slow down updates and bug fixes if not addressed strategically. Our team excels in Flutter for mobile and has extensive experience with React.js and backend frameworks capable of revitalizing such projects efficiently. You can check samples from our work at https://www.freelancer.com/u/eliaa Looking forward to hearing from you. Best Regards, Elia Fawzy.

@craigd43

With my extensive experience in the required MERN stack as indicated by my [Insert Years] of practice, this project would be a perfect match for my skills. Not only have I spent years mastering MongoDB, Firebase, and Google Maps API (required for this project), but I also have proficiency with Flutter app builds/ migrations, which will greatly facilitate the process of updating your app to the latest version seamlessly. Hiring me would mean gaining access to a developer who's deeply familiar with fixing "Access Denied" and "Gradle Sync" errors - those bugs won't stand a chance. Moreover, my background in full-stack web development will ensure that all of your application's necessary pieces are properly aligned and functioning harmoniously. What sets me apart is my relentless focus on delivering high-quality code ahead of deadlines without compromising on efficiency or scalability. Gaining your trust to work on Gurash will give me an immense opportunity to bring your legacy code back to life with modern reliability and performance while surpassing your expectations. Let's revive this app together!

@mobiwebsolutions

✋ Hi There!!! ✋ The Goal of the project:- TO FIX AND REVIVE THE LEGACY FLUTTER/MERN APP BY UPDATING DEPENDENCIES, MIGRATING THE FRONTEND, AND ENSURING FULL FUNCTIONALITY I have carefully read and understood your project description and can handle legacy code issues, build errors, and SDK migrations efficiently. I am the best fit for this project because of my extensive experience in Flutter and MERN stack maintenance. I will manage UI design, database management, testing, and full source code delivery. I have 9+ years experience as a full stack developer. I have completed similar projects involving Flutter migration, MERN backend updates, and Firebase integration. I will fix all build errors, update dependencies, and ensure Firebase and Maps integrations work seamlessly. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@albertc1996

Hi, your Gurash app needs a careful Flutter migration plus MERN dependency recovery without breaking Firebase or maps. Number of years of experience with MERN: 5+ years Experience with specific technologies: • MongoDB: Yes, 5+ years • Firebase (Auth/FCM): Yes, 4+ years • Google Maps/GalliMaps: Yes, 3+ years • Flutter (Build fixes/Migration): Yes, 3+ years Team or Solo: Solo developer I’ll reproduce the Access Denied/Gradle Sync/build errors, then upgrade Flutter SDK, Android Gradle, Firebase packages, and Node/Express/Mongo dependencies step by step. I recently revived a legacy mobile/API app, reducing 40+ build errors to zero. Available immediately with 2 weeks support. Do you have Firebase/GalliMaps credentials and current repo access? Best regards.

@riogushiken1114

Hi there, 1. Number of years of experience with MERN: 7 2. Experience with specific technologies: • MongoDB: Yes, 7 years • Firebase (Auth/FCM): Yes, 5 years • Google Maps/GalliMaps: Yes, 4 years • Flutter (Build fixes/Migration): Yes, 5 years 3. Country: Japan 4. Team or Solo: Solo developer I reviewed the Gurash legacy app requirements carefully and can help migrate the Flutter app, update the MERN backend, and restore Firebase/map integrations so it builds and is deployment-ready. Why I’m a good fit: • Strong experience fixing Gradle Sync, SDK, dependency, and Access Denied build issues • Hands-on Flutter migration plus Node.js/Express/MongoDB dependency updates • Careful audit approach to avoid breaking Firebase Auth, FCM, Firestore, and Maps flows I can start immediately, work through the legacy code cleanly, and keep communication clear throughout. Best regards,

@abhishek060

Hi, Legacy Flutter/MERN apps usually fail because of outdated SDKs, deprecated packages, Gradle conflicts, Firebase SDK changes, and broken dependency chains. I can help stabilize and modernize the Gurash application so it builds cleanly and becomes deployment-ready again. Here’s how I would approach your project: ✔ Fix Flutter build errors & Gradle sync issues ✔ Migrate Flutter to the latest stable version ✔ Update outdated MERN dependencies safely ✔ Restore Firebase Auth, Firestore & FCM integrations ✔ Debug Google Maps/GalliMaps compatibility ✔ Audit deprecated packages and API conflicts ✔ Perform full functionality testing before deployment 1. MERN Experience: 7+ Years 2. Experience with technologies: • MongoDB: Yes – 7+ years • Firebase (Auth/FCM): Yes – 5+ years • Google Maps/GalliMaps: Yes – 4+ years • Flutter (Build fixes/Migration): Yes – 5+ years 3. Country: India 4. Team or Solo: Dedicated development team A few quick questions: 1.) Which Flutter version is currently used? 2.) Are Android/iOS builds both failing? 3.) Is the backend already deployed? Ready to start immediately. Best regards Abhishek

@rbtech1984

Hi There!!! ★★★★ ( Legacy Flutter + MERN app revival, dependency fix & full system stabilization ) ★★★★ Project understanding: I understand you need a senior full-stack developer to fix and revive your existing Gurash app by migrating a legacy Flutter frontend to latest version, updating MERN backend dependencies, and fixing Firebase + Maps integrations so the system becomes stable and production ready. ⚜ Flutter migration to latest stable SDK ⚜ MERN stack dependency update & bug fixing ⚜ Firebase Auth, FCM, Firestore integration repair ⚜ Google Maps / GalliMaps API fixes ⚜ Gradle sync & build error resolution ⚜ Full system audit & deployment readiness check ⚜ End-to-end testing for production stability I have strong experience in Flutter migration, MERN stack maintenance, and debugging complex legacy systems. I’ve worked on apps with Firebase, maps APIs, and build pipeline issues (Gradle/SDK conflicts), ensuring smooth recovery and upgrade paths. Approach: first fix build environment and dependencies, then stabilize backend APIs, migrate Flutter safely, repair integrations, and finally run full testing to ensure production readiness. I can jump in immediately and fix legacy issues quickly and cleanly. Warm Regards, Farhin B.

@raghuch2415

Hi, I am ready to start immediately! MERN Experience: 10+ Years Experience with specific technologies: • MongoDB: Yes 10+ Years • Firebase (Auth/FCM): Yes 10+ Years • Google Maps/GalliMaps: Yes 10+ Years • Flutter (Build fixes/Migration): Yes 10+ Years Country: India Team or Solo: Solo Looking forward to discussing the project further. Thanks Raghu

@letscms

Hello, I’m Jitendra Sharma with 12+ years of software development experience and strong expertise in Flutter, MERN stack, Firebase, and legacy application maintenance. Number of years of experience with MERN: 8+ Years Experience with specific technologies: • MongoDB: Yes – 8+ years • Firebase (Auth/FCM): Yes – 6+ years • Google Maps/GalliMaps: Yes – 5+ years • Flutter (Build fixes/Migration): Yes – 5+ years Country: India Team or Solo: Solo Developer I have hands-on experience fixing old Flutter projects with Gradle sync issues, SDK incompatibilities, dependency conflicts, and Firebase migration problems. I can upgrade your Flutter application to the latest stable version, update MERN dependencies, verify Firebase/Auth/FCM functionality, and ensure maps integration works correctly with updated SDKs. I amm comfortable debugging “Access Denied,” build failures, Android/iOS compatibility issues, and outdated package problems in legacy codebases. I can also perform a full functional audit and prepare the application for stable deployment. I am ready to start immediately and can provide regular progress updates throughout the project. Best Regards, Jitendra Sharma

@CreativeIshan

With over a decade in the web development industry, I believe I am the perfect match for your project. Despite primarily specialising in WordPress and PHP for the past years, my extensive knowledge of a wide range of technologies including but not limited to JavaScript, MongoDB and Node.js qualifies me to handle your MERN requirement seamlessly. I guarantee to fix all build errors and update everything in the backend that's been holding your application back. Moreover, my commitment to staying up-to-date with the latest advancements in the field ensures I am well-prepared to tackle the Flutter migration challenge you are currently facing. My approach is thorough and meticulous - I investigate and repair every error that arises so your app functions smoothly & effectively across all platforms. In addition to my technical prowess and substantial experience leading projects successfully, my dedication to clear communication, punctuality and ongoing support sets me apart. I don't just deliver code; I deliver solutions tailored specifically for individual clients like you. With me on board, you can rest easy knowing that your Gurash app is in capable hands. It's time to transform your legacy code into a modern masterpiece; let's make it happen!

@zahariac2

Hello, I have strong experience with legacy Flutter and MERN applications, including dependency upgrades, Gradle sync/build fixes, Firebase migrations, and map API integrations. I can quickly audit the Gurash codebase, update outdated packages/SDKs, resolve build issues, and ensure the full application is stable and deployment-ready on the latest Flutter version. 1. Number of years of experience with MERN: 8+ years 2. Experience with specific technologies: • MongoDB: Yes – 8+ years • Firebase (Auth/FCM): Yes – 7+ years • Google Maps/GalliMaps: Yes – 6+ years • Flutter (Build fixes/Migration): Yes – 5+ years 3. Country: Romania 4. Team or Solo: Solo Developer I’m comfortable handling complex legacy code and can start immediately. Looking forward to working with you. Best regards.

@nemanjam61

Hello, I've built a similar project focusing on multi-store management and inventory tracking, which is directly applicable to your needs for the Gurash app. In the CPM project, I managed complex product catalogs and implemented a robust order management system, ensuring smooth data flow and synchronization with integrated payment gateways. For your app, I recommend updating the Flutter dependencies and implementing a CI/CD pipeline to streamline the build process. Let's discuss!

@emilesd617

Hi, I am a Senior Full-Stack developer with strong experience in Flutter and MERN stack. I am familiar with Flutter, Node.js, Express, MongoDB, Firebase. For this project, I can fix build errors, migrate the Flutter app to the latest version, update all backend dependencies, and ensure Firebase and Google Maps integrations work properly. This will make your legacy app functional and ready for deployment. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.

@manishcomp123

Number of years of experience with MERN: 4+ Years Experience with specific technologies: • MongoDB: Yes – 4+ years • Firebase (Auth/FCM): Yes – 3+ years • Google Maps/GalliMaps: Yes – 3+ years • Flutter (Build fixes/Migration): Yes – 3+ years Country: India Team or Solo: Solo Developer I have experience working with legacy Flutter and MERN applications, including fixing Gradle sync issues, dependency conflicts, Android SDK migrations, Firebase integration problems, and outdated package compatibility. I can update the Flutter app to the latest stable version, audit the MERN backend dependencies, and ensure Firebase/Auth/FCM and Maps integrations work correctly with the latest SDKs. I can start immediately and handle the full troubleshooting, migration, and deployment-readiness process for the Gurash app. Thanks