You will get any android java or kotlin native app bugs fixed
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Project details
Hello, I am Zobaer Hossain, an experienced android developer in this field for over 3+ years. Problem-solving gives me thrills and I Am Best At Bug Fixing Of Android Apps.
I will provide these services in android applications.
Gradle Issues
Android SDK issues
Google Maps
Managing API
API Integration
Dependency issues
Library issues
MYSQL Database
Splash Screen
Language Translation
SQL-lite Database
Material Design
Custom views
Deprecated methods fix
Responsive Screen
Firebase Integration
Firebase database error
Or any other
Tools and techniques I Use:-
Firebase
Android Studio
Why hire me?
I'm passionate about android means I will solve your issue with interest and care.
I'll provide the best solution.
Organized and neat with my work
Affordable Price
I will provide these services in android applications.
Gradle Issues
Android SDK issues
Google Maps
Managing API
API Integration
Dependency issues
Library issues
MYSQL Database
Splash Screen
Language Translation
SQL-lite Database
Material Design
Custom views
Deprecated methods fix
Responsive Screen
Firebase Integration
Firebase database error
Or any other
Tools and techniques I Use:-
Firebase
Android Studio
Why hire me?
I'm passionate about android means I will solve your issue with interest and care.
I'll provide the best solution.
Organized and neat with my work
Affordable Price
Platform
AndroidApp Type
Native AppDevelopment Technology
Java, KotlinApp Purpose
Blockchain, Chat, Cryptocurrency, Dating, Delivery, Finance, Entertainment, Education, Health & Fitness, IoTExpertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$250
|
Standard
$550
|
Advanced
$850
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 6 days |
Number of Revisions | 2 | 4 | Unlimited |
Bug Investigation | - | - | - |
Fix Documentation | - | - | - |
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RC
Raine C.
Nov 4, 2025
React Native Developer (Ongoing Monthly Work – $500 USD Retainer)
Zobaer is the best developer I have ever worked with! It is extremely hard to find someone who is communicative, hard working and can meet deadlines and Zobaer is definitely all 3. It can be hard to know what dev to go with since there’s so many, but save yourself the headache and consider using Zobaer:)
CC
Christopher C.
Oct 6, 2025
High-Volume, Simple Android App Development with Ad Integration (Hong Kong Google Play)
CR
Claudia R.
Apr 3, 2025
App Development Project
LD
Luis D.
Dec 11, 2024
App Developer Needed
MM
Musaab M.
Nov 4, 2024
Test My Mobile App (IOS/Android )
Thanks for testing the application
About Zobaer
AI Deiven Mobile App Developer | iOS & Android (Flutter/React Native)
100%
Job Success
Dhaka, Bangladesh - 3:50 am local time
Achieved 100% Job Success Ratio | 800+ Upwork Hours | 50+ Successful Mobile Apps Built
Are you looking for an expert developer to transform your vision into a high-performance, revenue-generating mobile application?
I am a Full-Stack Mobile App Developer with 5+ years of experience specializing in custom iOS and Android application development. By combining advanced cross-platform frameworks like Flutter and React Native with robust backend architectures and cutting-edge AI integrations, I deliver secure, scalable digital products engineered for long-term growth.
🛠️ Tech Stack & Core Capabilities
Mobile Frameworks: Flutter, React Native, KMM (Kotlin Multiplatform), Native Android (Java/Kotlin), Native iOS (Swift)
AI Integration: Custom AI Mobile App Development, OpenAI API, Chatbots, Personalized Avatars, Machine Learning APIs
Backend & Cloud: Node.js, Express.js, Next.js, Firebase, AWS (S3), Microsoft Azure, Docker
Databases: MongoDB, MySQL, PostgreSQL, GraphQL
UI/UX Design: High-fidelity prototyping in Figma, Wireframing, Dashboard Design, Responsive Web & App Layouts
📈 Industry Experience & Specialized App Niches
I design and deploy end-to-end applications across a wide array of fast-growing industries, integrating essential features like advanced analytics (Mixpanel, OneSignal, RevenueCat) and payment gateways (RazorPay, Stripe, Play Store Billing):
On-Demand Services: Food Delivery, Ride Instructor Booking, Home Service Apps
E-Commerce & Retail: Marketplace Platforms (Buyer/Seller), Inventory Management, Grocery Apps
Business & Finance: Investors Management, Real Estate Listings, Task Management Tools
Entertainment & Social: Social Media Platforms, Sports Apps, Live Streaming Integration
EdTech: Learning Management Systems (LMS), Educational & Quiz Applications
🤝 Why Work With Me?
End-to-End Execution: From a Figma UI/UX design wireframe to full-stack backend development and App Store/Google Play publishing, I handle the entire lifecycle.
Clean Architecture: I strictly follow MVVM/MVC patterns and SOLID principles, ensuring your app's codebase is clean, bug-free, and easy to maintain.
Post-Launch Support: Every project includes 6 months of complimentary maintenance support to keep your app running flawlessly.
Let’s build something incredible together. Click the "Message" or "Invite to Job" button on the top right, and let's hop on a call to discuss your mobile app project!
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I've majored in software engineering and have used a wide range of technologies to help businesses build mobile apps that have generated millions in revenue.
Over the past 5+ years, I have developed a range of iOS and Android mobile apps using AI-driven mobile app development.
Food delivery App, On-demand Mobile App, Ride Instructor Booking App, Real Estate Listing App, Social Media Mobile App, Task Management App (like To-Do), Investors Management App, Sports Mobile App, E-commerce Mobile App, Event Management Mobile App, Grocery Mobile App, Freelance Marketplace App, Home Service Booking App, Inventory Management App, Learning Management Mobile App, Appointment Booking App, Venue Booking Mobile App, ai mobile app development and many more.
𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐌𝐎𝐁𝐈𝐋𝐄:
✅ Dart | Java | Kotlin, Swift
✅ Flutter, React Native, KMM, Native Android
✅ REST API, Firebase
✅ Unit testing- JUnit, Mockito
✅ Agile, SCRUM, Jira, ClickUp, Trello
✅ MVVM, MVC, SOLID Principle, Clean architecture
𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐅𝐑𝐎𝐍𝐓𝐄𝐍𝐃:
✅ JavaScript | Typescript
✅ ReactJs | Next.Js
✅ HTML5 | CSS3 | Bootstrap | Ant Design | MUI
✅ Tailwind CSS | Sass | Chakra UI
✅ Content Management System (CMS)
✅ WordPress | WooCommerce
𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐁𝐀𝐂𝐊𝐄𝐍𝐃:
✅ NodeJS | NextJS | Express JS
𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐃𝐀𝐓𝐀𝐁𝐀𝐒𝐄:
✅ MongoDB | MySQL | PostgreSQL | GraphQL
𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐂𝐋𝐎𝐔𝐃:
✅ AWS | (S3)
✅ Microsoft Azure | Azure DevOps | Docker
✅ Git | Git Hub | Git Lab
⭐ 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁:
✦ Responsive Web Design
✦ Front-End and Back-End Development
✦ Advanced API Integration
✦ Performance and Security Optimization
✦ UI/UX Design with a focus on user engagement
✦ Cross-Browser Compatibility
✦ Progressive Web Apps (PWAs)
✦ Database Management
In addition to the above, I have hands-on app publishing experience in Play Store and apple store.
𝐖𝐡𝐲 𝐜𝐡𝐨𝐨𝐬𝐞 𝐦𝐞?
✅ Get your projects designed and developed promptly.
✅ Detailed and efficient prototyping ensures your project meets your expectations.
✅ Delivering industry-standard practices in ingestion, integration, development and testing.
It's important to me to build long-term relationships with clients. I am flexible with my working hours and I am happy to work closely with any existing freelancers.
P.S.
- When you work with me your satisfaction is 100% guaranteed.
- Every person who ever worked with me got results.
Steps for completing your project
After purchasing the project, send requirements so Zobaer can start the project.
Delivery time starts when Zobaer receives requirements from you.
Zobaer works on your project following the steps below.
Revisions may occur after the delivery date.
Issue Identification
Begin by identifying and documenting the specific issues or bugs in the project. This may involve reviewing error logs, user reports, or performing tests.
Prioritization
Prioritize the identified issues based on their severity and impact on the project. Critical issues that affect core functionality should be addressed first.