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I will fix flutter app bugs, upgrade sdk and publish to app store
Senior Flutter Developer I iOS Android Apps I AI SaaS MVPs for Startups
𝗕𝘂𝗶𝗹𝘁 𝟭𝟱+ 𝗦𝗮𝗮𝗦 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝗮𝗻𝗱 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗠𝗩𝗣𝘀. I am a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 expert in cross-platform development for both Android and iOS apps.
Driven by a p...
About this Gig
Is your Flutter app crashing, stuck on an old SDK, or failing to build? Rejected by Apple or Google? I fix it fast and explain what went wrong.
I'm Zubair, a senior Flutter engineer who has shipped 10+ apps to the App Store and Google Play.
I fix:
- Crashes, red screens and broken features
- Gradle, CocoaPods, Xcode and build errors
- Flutter SDK and package upgrades (Dart 3)
- Firebase, push notification and API issues
- Slow screens, memory leaks, janky scrolling
- Store rejections, plus first-time publishing
Every fix is tested on real iOS and Android devices, with a short root-cause note so it doesn't come back.
Send your error or a screen recording before ordering and I'll confirm the right package.
Need new features after the fix? See my Flutter App gig
Want AI in the app? See my GPT Integration gig
Rebuilding from scratch? See my AI SaaS MVP gig
Platform:
Cross-platforms
App type:
Hybrid
My Portfolio
FAQ
Can you work on code another developer wrote?
Yes, most of my fix work is on inherited codebases. I review the code first and tell you honestly what it needs.
What do you need from me?
Repo access (GitHub/GitLab/Bitbucket), the error message or a screen recording, and which devices show the problem.
My app was rejected by Apple. Can you help?
Yes. Send me the rejection message and I'll fix the cause and resubmit with notes for the reviewer.
Do you develop apps for both Android and iOS platforms?
Yes! I specialize in cross-platform mobile app development using frameworks like Flutter, ensuring your app runs smoothly on both Android and iOS devices with a single codebase. This saves cost and reduces development time.
Can you design the complete UI/UX for my mobile app?
Absolutely! With 3 years of UI/UX design experience, I use modern design tools like Figma, Adobe XD, and Sketch to create visually stunning and user-friendly app interfaces. From wireframes to final design, I handle everything to match your brand identity.
Do you offer app store deployment and support after the launch?
Yes! I provide complete support for Google Play and Apple App Store submission, including app review handling, icon/splash design, and listing optimization. I also offer post-launch maintenance and updates as needed.
Can you integrate AI, Machine Learning, or ChatGPT into my app?
Definitely! I have experience integrating AI/ML models, LLMs, and ChatGPT for smart features like chatbots, content generation, recommendation systems, and more—tailored to your app’s functionality.
What makes your mobile app development service stand out?
With 5+ years of development experience, a focus on startup growth, secure coding practices, and free initial consultancy, I offer a full-stack solution—from design to deployment, with guaranteed quality and reliability.
