Senior Flutter Developer / Technical Lead Needed for Existing Fitness App Recovery & Audit

@Agiletechstudio

Hello, I have reviewed your requirements about Existing Fitness App and have a few questions regarding the project. Please send me a message so we can discuss the requirements in detail and ensure a clear understanding of the project scope. We are confident that we can successfully complete this project after clarifying the requirements. Throughout the development process, We will provide regular progress updates and daily work reports. Upon completion, We will deliver the complete source code along with all project files. We have more than 12 years of experience in: Custom Web Application Development Desktop Application Development Mobile Application Development API Integrations ERP and CRM Systems You can review our portfolio and client feedback here: https://www.freelancer.com/u/Agiletechstudio We are available 24/7 and have extensive experience with similar projects. We also have a strong portfolio of relevant work that we would be happy to share with you during our discussion. Thank you for your time and consideration. I look forward to hearing from you. Best regards, Farwa

@hirujiyu

➰➰ EXPERIENCED FLUTTER DEVELOPER SINCE 8+ YEARS Hi, ✋ Based on your requirements, this is exactly the type of project where a structured recovery approach is more important than rushing into development. My first priority would be conducting a full technical audit of the Flutter codebase, backend integrations, dependencies, and deployment process before preparing a detailed recovery roadmap with risks, timelines, and milestones. What I Can Help With: ✅ Flutter Migration & Breaking Change Resolution ✅ API Integration Validation ✅ Package Replacement & Refactoring ✅ Build Automation (GitHub Actions / Codemagic) ✅ TestFlight & Google Play Deployment ✅ Production Dashboard Integration ✅ Long-Term Maintainability Planning ⭕ Which Flutter version is the application currently running on? ⭕ Is the admin dashboard built in Flutter Web, React, or another framework? ⭕ Do you already have staging and production environments configured for testing? ➰ I’m comfortable collaborating through Slack, GitHub, and weekly stand-ups, with a strong focus on maintainable code, transparent communication, and a clean release process. Thank you.

@Microlent

Hi, I read your requirement carefully. This isn't a rewrite, it's a structured recovery project. The priority is stabilizing the existing Flutter codebase, restoring compatibility with the latest SDKs, and bringing the entire platform back to a maintainable, production-ready state. We've helped recover and modernize existing applications by upgrading frameworks, refactoring legacy code, integrating APIs, and preparing automated deployment pipelines. My approach: • Audit the Flutter project and migrate it to the latest stable Flutter/Dart versions. • Reconcile every API endpoint with the current backend models and resolve integration gaps. • Replace unsupported packages, strengthen authentication, and implement scalable state management. • Configure GitHub Actions for automated TestFlight and Google Play Internal Testing deployments. • Complete the admin dashboard using production APIs and role-based authentication. • Deliver a recovery roadmap, documentation, environment setup, and long-term maintenance guidelines. Estimated timeline: 4 to 6 weeks, depending on the audit findings. One question: Which state management solution does the current app use (Provider, Riverpod, Bloc, GetX, etc.), and is the backend already versioned? I'd be happy to review the existing codebase and prepare a detailed recovery plan before development begins. Regards, Rajesh Rolen Microlent Systems

@KESHAVINFOTECH

Hi, This is a recovery-and-relaunch project, not a greenfield build. The main risk is drift between Flutter models, outdated packages, and the live API contract. I’d first stabilize the app on the current Flutter/Xcode/Android Studio setup, then validate each user flow against the backend so release builds stop failing and future work starts from a clean, current codebase. My first step would be a full code audit and build repair: resolve SDK migration issues, replace abandoned dependencies, and verify auth/state handling before any feature work. Then I’d align screens with endpoints, fix model mismatches, and set up a safer release process with automated builds for TestFlight and Google Play internal testing. Key focus areas: - Codebase and build audit - Flutter SDK migration - API/model alignment - Auth and state cleanup - CI/CD setup and beta deploys Timeline: I can start with the audit and build stabilization immediately, then move into API alignment and release pipeline hardening once the core issues are identified. Which user flows are most critical to verify first against the live APIs before we move into the admin dashboard and release pipeline?

@kamran2012

I can help with this, I will audit your Flutter codebase, migrate it to the latest stable channel, and fix every breaking change so you get clean, warning-free release builds on both platforms. From there I will map each screen to its backend endpoint, patch the model mismatches, wire up the admin dashboard to production data, and stand up CI/CD pipelines pushing to TestFlight and Google Play. On a similar recovery project, the biggest risk was abandoned packages with no maintained alternatives. I will flag those early in the audit and propose replacements before they block progress. Questions: 1) Is the backend documented in something like Swagger/Postman, or will I be working from source code? 2) What state management approach did the previous team use (Bloc, Riverpod, Provider)? Looking forward to talking through the details. Kamran

@corpmember29

Hello, We have worked on similar Flutter recovery, migration, and maintenance projects and can share relevant examples during our discussion. I have carefully reviewed your requirements and understand that your existing Flutter application requires a complete technical audit, SDK migration, API model alignment, code refactoring, CI/CD setup, admin dashboard completion, and successful deployment to TestFlight and Google Play. With 10+ years of experience in Flutter, Firebase, REST APIs, CI/CD, and mobile architecture, I can recover the existing codebase, resolve release build issues, integrate the latest backend models, implement secure authentication and state management, automate the deployment pipeline, and deliver a maintainable, production-ready application with complete documentation. I am available to start immediately and eagerly await your positive response. Thanks.

@ykarora26

With extensive experience in Flutter app development and API integrations, I understand your need for a comprehensive recovery and relaunch of your mobile codebase. My past projects involved similar tasks, such as migrating codebases, updating APIs, and implementing CI/CD pipelines. Could you share more details about the specific features and functionalities that need to be prioritized during the recovery process? Regards, Yogesh Kumar

@joomextensions

Hi, I can lead the recovery of your Flutter fitness app. I'll audit the codebase, migrate to the latest stable Flutter channel, and resolve the release-build breaking changes. Next, I'll map every screen to its backend endpoints, patch mismatched models, and replace abandoned packages with secure, maintained authentication and state management. I'll set up CI/CD pipelines pushing to TestFlight and Google Play internal tracks, and finish wiring the admin dashboard to live production data behind secure login. You'll get a recovery plan with milestones and risk assessment, plus a handoff package with setup scripts, environment templates, and docs. Could you share the API docs/Postman spec and confirm the GitHub repo state so I can scope accurately? Regards, Harsh Thoriya

@ergauravsethi376

Hi, I understand that you need an experienced Flutter developer to recover, refactor, and relaunch your existing app by auditing the codebase, fixing API integrations, upgrading to the latest Flutter version, setting up CI/CD, and deploying successfully to both TestFlight and Google Play. I can help you take over this project and bring it back to a stable, production-ready state. I have strong experience with Flutter, REST APIs, Firebase, CI/CD, state management, and App Store/Play Store deployments. I have a few questions before we begin: - Can you share the current Flutter codebase and GitHub repository? - Is the admin dashboard built in Flutter or another framework? - Are the Apple and Google Developer accounts already configured for deployment? I’m confident I can recover the project with clean, maintainable code while keeping you updated throughout every milestone. Looking forward to discussing the project. Best regards, Gaurav

@C0RETECHIES

Hi there, I understand the situation: your Flutter fitness app is in a state of technical debt, unable to build on current SDKs and desynchronized from its backend. The operational goal is to perform a full technical recovery-stabilizing the codebase, realigning it with the live APIs, automating deployments, and completing the admin panel to restore operational control. Technical approach: My first step is a deep audit of the codebase to map all required SDK and package upgrades. I'll refactor the state management using Riverpod or BLoC for stability. The API layer will be rebuilt with strictly typed models matching the live endpoints. CI/CD will be implemented via GitHub Actions for automated pushes to TestFlight and Play Console internal testing tracks. Core modules: This involves a Codebase Migration to the latest stable Flutter, an API Synchronization phase to fix data mismatches on every screen, building a robust CI/CD Pipeline for automated deployments, and finishing the Admin Dashboard with secure access to production data. Relevant systems: We have direct experience building and recovering complex Flutter applications. Our work on Bison360 involved a Flutter mobile client for a large-scale ERP, and StepOut Live was a 4-app Flutter ecosystem, demonstrating our capability to handle multi-faceted mobile projects. Implementation strategy: I'll begin with a detailed recovery plan. Phase 1 is stabilization: getting a clean, warning-free build. Phase 2 will focus on API/UI correction across all user flows. Phase 3 covers CI/CD and the admin dashboard, followed by comprehensive testing and handoff documentation. Regards, Rohit

@point2solutions

✨✨✨✨ Flutter App Recovery, Refactor & Relaunch – Ready to Start Immediately ✨✨✨✨ Hello there, I've carefully reviewed your requirements and understand that your project needs a complete recovery, refactoring, and successful relaunch. We're ready to take ownership and restore your Flutter application with clean, scalable, and maintainable code. We'll audit the existing codebase, migrate it to the latest Flutter version, fix API and model mismatches, rebuild abandoned components, complete the admin dashboard, set up automated CI/CD for Test-flight and Google Play, and provide complete documentation with a smooth handover. With "11+ years of experience" & a team of "250+ skilled developers", we specialise in Flutter, REST APIs, PHP backends, CI/CD, and mobile app deployment. We follow clean architecture, maintain clear Git history, and ensure regular communication throughout the project. We're ready to start immediately and deliver a stable, production-ready application. Looking forward to discussing the next steps. Thanks.

@seefattechnologi

A SUCCESSFUL APP RECOVERY ISN'T ABOUT PATCHING ISSUES IT'S ABOUT REBUILDING A STABLE FOUNDATION FOR FUTURE GROWTH. I'll audit the Flutter codebase, migrate it to the latest stable SDK, reconnect every API, complete the admin dashboard, and set up CI/CD for reliable TestFlight and Google Play deployments. Is the backend API fully documented (Swagger/Postman), or will API discovery also be part of the recovery?

@Rekhathakur

Hello, Leveraging over a decade of industry experience at WellSpring Infotech, I have developed core competencies in both Flutter and JavaScript. As the lead developer for your fitness app recovery and audit project, my primary focus will be on offering you scalable solutions while ensuring a clean, error-free codebase. My experience in backend development will prove particularly useful towards mapping app screens to their corresponding API endpoints, resolving any mismatches, and updating models. To tackle the challenge your team has faced with release builds, I will migrate the Flutter front-end to the latest stable channel, providing fully-functional versions of the app without any hitches. Beyond this initial refurbishing, I plan to use my technical prowess to introduce TestFlight and Google Play uploads automation, engaging continuous integration processes for immediate detection of issues, and probding CI/CD approach dalam Thank you

@DeveloperStation

Hi, We’ve successfully led similar projects, including a fitness app that integrated with Google Fit and Apple Health. We understand the importance of a strong foundation and have a dedicated QA team to ensure that new features don’t compromise existing functionality. With 15 years of experience in web and mobile development, I’ve worked extensively with Flutter since its early days. I can handle both front-end and back-end tasks, and I’m equally proficient with CI/CD pipelines and server management. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best regards, Adil

@Hammadhassan21

Hey, i will create a clean and professional Flutter mobile application recovery solution for your existing app that focuses on improving stability, performance, and delivering a successful relaunch with a reliable user experience. I will audit and refactor your Flutter codebase, resolve SDK issues, update API integrations, improve app architecture, and set up proper deployment workflows. I will also complete dashboard connectivity, testing, authentication, and documentation to ensure the project is maintainable and ready for future updates while following your requirements. i have experience with similar projects and i am interested in working on this with your budget. Do you already have any preferred priorities or specific issues you want me to address first? portfolio: https://www.freelancer.com/u/Hammadhassan21 Best Regards: Hammad Hassan

@ambientinfotech

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

@godesignpk

Recover, refactor, and relaunch your existing Flutter fitness app. Our approach focuses on auditing your Flutter codebase, migrating it to the latest stable SDK, and resolving all breaking changes. We will meticulously map and patch backend API mismatches, rebuild abandoned packages for secure authentication and state management, and establish automated CI/CD pipelines for seamless TestFlight and Google Play distribution. The unfinished admin dashboard will be completed to expose key content and user metrics, ensuring it runs on production data. We will also produce a comprehensive recovery plan with milestones, risk assessment, and maintenance guidelines. We have experience in developing and stabilizing complex applications, including custom backend integrations and deployment pipelines. While we don't have a direct Flutter app recovery in our public portfolio, our work on custom web applications and API integrations demonstrates our capability to handle intricate system recovery and enhancement. For example, our work on custom platforms often involves similar API mapping and backend logic stabilization. What is your preferred method for reviewing the initial code audit findings?

@asadali6998767

As a highly experienced and top-rated freelancer, I specialize in all the technologies required for your project. My expertise in Flutter is invaluable as it's the core technology your existing app is built with. I've mastered all the aspects of mobile application development ranging from code audit, API integration to the user-interface layer including consistent performance, secure authentication, and state management which are significant features you're seeking in your recovery project. Additionally, my lateral skill set in backend development helps me effectively connect the new or rebuilt Flutter components with your existing API-driven backend which obviously reduces gaps and improves harmony between front-end and back-end. Furthermore, my fluency in mobile app distribution through TestFlight and Google Play Store ensures that I can streamline and automate this crucial process for you swiftly. Also, my experience in building functional admin dashboards that allow easy access to content and users' performance metrics will be an asset in completing the unfinished functionality of your app. Collaboration is key for a project like this and rest-assured, I am proficient in utilizing platforms like Slack, GitHub for streamlined communication. I understand the importance of maintaining optimum code quality and providing clear documentation hence my work is not only about speedy recovery but sustainable long-term use.

@vladang

This feels less like a new build and more like a controlled recovery project, which usually starts with understanding what can be saved before changing anything. I’d begin by getting the current Flutter app building in a reproducible environment, identifying SDK, package, and release-build failures separately so we can see where the real blockers are. From there, I’d map every screen and user flow against the live API responses, update models where contracts have drifted, and remove or replace abandoned dependencies that are creating maintenance risk. Authentication, state management, and release configuration would be reviewed early because they tend to affect everything else downstream. Once the app is stable, I’d set up automated TestFlight and Google Play pipelines so releases stop depending on manual uploads. The admin dashboard would be completed against production APIs with proper access controls and auditability. I’ve handled similar recovery work on API-driven platforms where the challenge was reconnecting unfinished frontend work to evolving backend contracts without introducing new instability. One thing I’d like to confirm: is the admin dashboard also Flutter-based, or was it started with a separate web stack? I’m ready to dig in and start the audit.