
Experienced Flutter Developer for Cross-Platform App Enhancement
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Post a project like this351
$35/hr
- Posted:
- Proposals: 16
- Remote
- #4315393
- Awarded
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Full Stack Developer | Web Mobile Development | React Node.js | Flutter React Native
Delivering High-Quality IT Services at Competitive Prices |Experienced Full Stack Web and App Developer |Android and IOS App Development|


Full Stack Developer | Website Developer | React Developer | Mobile Application Developer | Flutter Developer | Android & iOS Developer | Software Engineer | Web Developer
94320581174233104230484899784115367584289179119766341193162511814143239937610730971992783
Description
Experience Level: Expert
Flutter Developer Opportunity
We are seeking an experienced Flutter developer to enhance and maintain a well-established app on Android and iOS. Your expertise in Flutter, CocoaPods, and native Android/iOS integration will ensure seamless updates and stability. This role demands commitment to quality and timely delivery, even on weekends or holidays.
Project Overview
1. Existing App:
- Fully functional APK and IPA (Dated 20/12/2024) with features like:
- Camera integration and data exchange via the method channel.
- Available on Apple Store and Google Play, fully operational except for a camera communication issue on iOS (already fixed in new code you will implement).
2. Code Updates:
- Bug fix for iOS method channel integrated into new code.
- App features include selfie snapping and real-time data exchange, live on Play Store and App Store.
3. Environment Setup:
- iOS uses CocoaPods; Android includes Swift/Kotlin native code.
- Configurations are stable and require ongoing maintenance.
Scope of Work
Phase 1: Restore Functionality
- Reinstate menus (M16a, M16s, M16l) from Git.(works on the stores)
- Fix product count display. (works on the stores)
- Save data pre-login. (worked with firebase, but we are replacing it so it must now work with login instead)
- Configure CocoaPods and Android components.
Phase 2: Replace Firebase with SSE
- Remove Firebase dependencies for messaging
- Implement Server-Sent Events (SSE) for real-time notifications.
- Update and test notifications for Android and iOS.
Estimated Time: 20 hours (8–9 for Phase 1; 12–13 for Phase 2).
Key Requirements
1. Experience:
- Flutter (3.3.8), Dart (2.18.4).
- Android Gradle (7.4), Build Tools (33.0.0), Java 11.
- iOS Xcode (14+), Swift (5.0), CocoaPods (1.11.0).
- Replacing Firebase with SSE.
2. Technical Expertise:
- Provide code snippets for:
- SSE/WebSocket implementation in Flutter.
- Flutter-to-native communication using Swift (iOS) and Kotlin (Android).
- Proven record of native integration (CocoaPods/Swift/Kotlin).
3. Professionalism:
- Punctuality and commitment to deadlines.
- Clear, consistent communication.
Expectations
- Complete the project in 2.5 days with no regression.
- Provide functional code with rigorous testing.
- Penalties apply for missed deadlines or subpar work.
What We Provide
- Functional APK and IPA versions.
- Clear instructions and supportive communication.
This role demands exceptional skills, efficiency, and adherence to professional standards. The compensation is on par with European developers. If you meet the criteria and can deliver, we look forward to your application.
Ps! Please note. No excuses are accepted for delays, weekends, festivals, family conditions or untested code.
You are now also expected to work on western level of coding with this hourly rate.
If you know you need more time or do not have the capacity to do the job then do not bid.
The requirements are raised significantly at this level of compensation.
On the other hand you will also get seed exact file, function and suggested code to add.
Do not complain about the code or come up with things are not working. The code is analysed with both myself with 46 years, in software and ai. The classification is C+ mainly due to lack of proper commenting and some redundancies of functions.
We are seeking an experienced Flutter developer to enhance and maintain a well-established app on Android and iOS. Your expertise in Flutter, CocoaPods, and native Android/iOS integration will ensure seamless updates and stability. This role demands commitment to quality and timely delivery, even on weekends or holidays.
Project Overview
1. Existing App:
- Fully functional APK and IPA (Dated 20/12/2024) with features like:
- Camera integration and data exchange via the method channel.
- Available on Apple Store and Google Play, fully operational except for a camera communication issue on iOS (already fixed in new code you will implement).
2. Code Updates:
- Bug fix for iOS method channel integrated into new code.
- App features include selfie snapping and real-time data exchange, live on Play Store and App Store.
3. Environment Setup:
- iOS uses CocoaPods; Android includes Swift/Kotlin native code.
- Configurations are stable and require ongoing maintenance.
Scope of Work
Phase 1: Restore Functionality
- Reinstate menus (M16a, M16s, M16l) from Git.(works on the stores)
- Fix product count display. (works on the stores)
- Save data pre-login. (worked with firebase, but we are replacing it so it must now work with login instead)
- Configure CocoaPods and Android components.
Phase 2: Replace Firebase with SSE
- Remove Firebase dependencies for messaging
- Implement Server-Sent Events (SSE) for real-time notifications.
- Update and test notifications for Android and iOS.
Estimated Time: 20 hours (8–9 for Phase 1; 12–13 for Phase 2).
Key Requirements
1. Experience:
- Flutter (3.3.8), Dart (2.18.4).
- Android Gradle (7.4), Build Tools (33.0.0), Java 11.
- iOS Xcode (14+), Swift (5.0), CocoaPods (1.11.0).
- Replacing Firebase with SSE.
2. Technical Expertise:
- Provide code snippets for:
- SSE/WebSocket implementation in Flutter.
- Flutter-to-native communication using Swift (iOS) and Kotlin (Android).
- Proven record of native integration (CocoaPods/Swift/Kotlin).
3. Professionalism:
- Punctuality and commitment to deadlines.
- Clear, consistent communication.
Expectations
- Complete the project in 2.5 days with no regression.
- Provide functional code with rigorous testing.
- Penalties apply for missed deadlines or subpar work.
What We Provide
- Functional APK and IPA versions.
- Clear instructions and supportive communication.
This role demands exceptional skills, efficiency, and adherence to professional standards. The compensation is on par with European developers. If you meet the criteria and can deliver, we look forward to your application.
Ps! Please note. No excuses are accepted for delays, weekends, festivals, family conditions or untested code.
You are now also expected to work on western level of coding with this hourly rate.
If you know you need more time or do not have the capacity to do the job then do not bid.
The requirements are raised significantly at this level of compensation.
On the other hand you will also get seed exact file, function and suggested code to add.
Do not complain about the code or come up with things are not working. The code is analysed with both myself with 46 years, in software and ai. The classification is C+ mainly due to lack of proper commenting and some redundancies of functions.
Projects Completed
39
Freelancers worked with
35
Projects awarded
48%
Last project
6 Dec 2025
United Kingdom
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Log inClarification Board Ask a Question
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Hello James,
> What features are currently tied to Firebase Cloud Messaging, and how should these be replaced with SSE?
> Are there any platform-specific considerations for notifications (e.g., custom payloads for iOS or Android)?James L.07 Jan 2025It's, to replace Google in everything. Given their behaviour and tracking of people it is to just replace everything.
it's notification mainly. -

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