👋 Hey there! I’m a Flutter Developer with 5+ years of experience building sleek, high-performance mobile apps for startups and fast-moving teams. My journey started with native Android and iOS, but I quickly fell in love with Flutter’s speed and flexibility.
I’ve led projects from scratch, refactored messy codebases, and shipped cross-platform apps that users actually enjoy. Clean architecture, smooth animations, pixel-perfect UIs? That’s my jam. I also know my way around Firebase, Supabase, REST APIs, and have dabbled in React Native when needed.
If you’re looking for someone who writes scalable Flutter code, thinks like a product owner, and genuinely cares about user experience. Let’s build something great.
Flutter
Dart
Firebase
Mobile App Development
iOS Development
iOS
Android
Hybrid App Development
Firebase Cloud Firestore
In-App Purchases
Push Notifications
Swift
NestJS
RESTful API
SwiftUI
Vadim P.
Barcelona, Spain
$40/hr
5.0
22 jobs
Need someone who can build, stabilize and scale your Android product? You found him 🤝
📊 12+ years in mobile delivery
📊 20+ Android-focused projects
📊 10+ years with regulated and business-critical products
📊 30+ production Android release cycles
📊 5+ years in Kotlin-first development
📊 4 product areas: compliance-ready apps, secure payments, backend-heavy systems and Software Development
I help companies build secure, maintainable apps Healthcare, FinTech, consumer products.
Core Expertise
🔹 Native Android engineering with modern architecture and Software Design
🔹 Kotlin-first development for maintainability
🔹 Legacy modernization Java to Kotlin
🔹 Secure integrations, performance tuning, release stability
🔹 Product delivery for Healthcare, FinTech, consumer platforms and Mobile App Development
I’m an android developer focused on reliability and clean architecture. As a kotlin developer, I build scalable solutions with android kotlin best practices, Jetpack tooling and AOSP awareness. Clients come to me for android developer kotlin expertise when they need stability, lower technical debt and growth.
I work as an android app developer on products that need more than interface implementation. I support teams with android app development for secure solutions where every android app stays maintainable after launch. My background: improving an android application used by thousands of users, integrating backend systems, payment flows, and healthcare-grade data handling. That is why companies hire me as an android mobile developer ( android mobile app developer ) when they need delivery.
What I Do Best as ai mobile app developer
✅ Android development using Kotlin and Java
✅ Architecture design with MVVM, Clean Architecture, modularization
✅ Backend communication, authentication and payment integrations
✅ Performance optimization, debugging, maintenance and release support
✅ Application Improvement for live mobile products
My strongest specialization is android developer kotlin work. I join teams that need android developer kotlin java skills to modernize legacy code, migrate modules, and improve release quality without a full rewrite. That benefits from practical experience as a java developer from thinking like an android kotlin developer who can handle new features and stabilization.
Relevant Experience Highlights as a full stack mobile app developer
🔸 Healthcare mobile applications with compliance-aware architecture
🔸 Secure data handling and app stability improvements
🔸 Secure apps with payment integration and transaction-safe flows
🔸 Backend integrations with PHP, Python, JavaScript, and REST APIs
🔸 Collaboration with iOS, backend, QA, full stack developer
🔸 Ability to scale from one engineer to a delivery team
I also have experience with android ble, android bluetooth features for pairing flows, reliable data exchange. Whether I contribute to an android mobile app or support an existing codebase as a mobile developer, I focus on release readiness, ai mobile app development.
Tech Stack
🔸 Android kotlin with Jetpack, Compose, Android SDK, AOSP
🔸 Java, Firebase, secure cloud services, CI/CD
🔸 REST APIs, secure auth, payment gateways, mobile app development api
🔸 Node.js, JavaScript, C#, SQL backend alignment
🔸 Git, Android Studio, release workflows, crash analysis
🔸 MVVM, Clean Architecture, modular apps, scalability-first mindset
My work is rooted in native Android, but I also understand broader product ecosystems. I collaborate effectively as an ios developer ( ios app developer ) when cross-platform alignment matters, including iOS Development discussions with teams using Swift. I have worked alongside teams using react native and reviewed delivery implications where flutter developer was involved, though I do not present those as my core specialization. That exposure helps me operate as an android developer and product-minded mobile app developer within cross-functional teams.
Team & Product Collaboration
🔹 Coordination with a rest api developer
🔹 Alignment with web application development
🔹 Communication with a web developer or front end developer
🔹 Familiarity with database builder, django, and python automation
Support I Can Provide
✔️ Build a mobile app from scratch
✔️ Join an existing product as an app developer android
✔️ Refactor legacy code modernize architecture
✔️ fix android application bugs and improve release readiness
I do not position myself as a wordpress, magento, game developer or unreal engine specialist and I do not use unrelated positioning such as android developer india. Even when someone types android develoer, they usually need a senior specialist who can take ownership. I built mobile applications for autism-related projects with intuitive user experience.
📬 If you need an android developer who can improve an existing product, build a reliable solution from scratch or support growth with kotlin developer depth, send me a message.
Flutter
Firebase
Mobile App Development
AOSP
Kotlin
Node.js
Android App Development
Swift
iOS Development
JavaScript
Software Design
Python
ExpressJS
SQLite
Android SDK
iOS SDK
Google Play
App Store
REST API
Git
Volodymyr V.
Lloret de Mar, Spain
$44/hr
5.0
2 jobs
I provide React Native developer services that ship cross-platform iOS and Android apps surviving real users, store reviews and multi-year roadmaps - 12+ years of React Native developer, mobile app development and mobile app developer practice, 20+ React Native developer apps shipped across consumer, marketplace, social, safety and SaaS. My job is to scope React Native developer engagements, match the right React Native developer engineers and stay accountable for delivery.
Why hire my React Native developer (s):
- 12+ years of React Native developer, mobile app development and mobile app developer practice
- 20+ React Native developer apps shipped to App Store and Google Play
- 100% Job Success Score, Top Rated Plus
My React Native developer ships cross-platform iOS and Android from a single TypeScript codebase. The same React Native developer owns the pipeline from architecture to App Store and Google Play - native modules, push, IAP, Apple Pay / Stripe and OTA. A React Native developer ships both stores on the same cadence as web releases. After a junior react native engineer leaves a broken build, my React Native developer rebuilds with react native developer expo / EAS, react native tailwind UI and react native expo / OTA. Founders also hire my React Native developer engineers for react native app developer work on in-app purchases, Apple Pay and Stripe flows, and for full stack developer react native engagements where the React Native developer owns the API.
My React Native developer runs a loop: discovery, mobile app design, build, submission, analytics, next version. My React Native developer works across native iOS, native Android and react native mobile codebases, one tool per feature. My mobile app development covers flutter mobile app development when the brief is Flutter-first, ios mobile app development when only iOS matters, ai mobile app development when an LLM layer is part of the product, and mobile app development flutterflow rebuilds when a no-code MVP needs to scale into real mobile app development. It is also where mobile app marketing hits code - release notes and IAP config in the release plan.
My mobile app developer work, led by React Native developer engineers, owns the part most underestimate - dev to live stores with paying users. A solid mobile app developer knows reviewers, manifests, rejections and payment edge cases. My mobile app developer work delivers mobile app design that respects platform conventions - iOS gestures, Android back-button, layouts. It also covers ai mobile app developer work on LLM features, mobile application developer migrations off no-code stacks and a bubble_io certified developer mobile app handoff when the founder wants the original prototype owner kept in the loop. A mobile app developer ukraine setup keeps me time-zone-friendly to EU and EST. Most mobile app developer briefs end with a React Native developer shipping into App Store and Google Play.
Clients hire my React Native developer engineers when they need:
- a React Native developer to ship iOS and Android from one codebase
- a mobile app developer for full-cycle mobile app development from idea to store
- mobile app development for an existing web product that needs a real mobile app
- a react native developer expo workflow with EAS / OTA
- a react native app developer for IAP, Apple Pay or Stripe
- a full stack developer react native who owns API and backend
- mobile app design that respects iOS and Android conventions
- a web developer or react nextjs counterpart for web/mobile alignment
- a flutter developer for Flutter migrations
- a python developer for ML / AI services in mobile pipelines
Recent work my engineers shipped:
- Shipped France Verif, a React Native web-safety app that auto-scans e-commerce domains against a 10M+ domain base - 200K Android and 120K iOS installs, on infra handling 170M+ requests a week.
- Shipped Control Plus, a personal-safety app with native spam call and SMS filtering, opt-out automation and browser security - 21K iOS and 8K Android installs.
- Built Verified, the mobile client for a real-time identity platform - 3-step KYC onboarding, a universal ID and QR verification that unlocks hundreds of services from one check.
- Delivered BuildIT, a B2B construction field app on one hybrid iOS/Android codebase - camera, GPS, contacts, real-time cloud sync, mockups to store in under 2 months.
- Shipped Chekt Travel, an AI packing app on React Native with an OpenAI assistant that builds personalized lists, plus offline-first sync and collaborative packing.
Core React Native developer stack: React Native, TypeScript, native iOS/Android, Flutter, Node.js, Laravel, PostgreSQL, Stripe, Firebase, Apple/Google Pay, OTA.
Need a React Native developer, mobile app development partner or mobile app developer that delivers and stays long-term - let's talk. Most clients who start with one React Native developer engagement come back for the next phase.
Flutter
Smartphone
Firebase
Mobile App Development
React
iOS Development
Android App Development
Swift
MongoDB
TypeScript
Node.js
JavaScript
Redux
Software Development
React Native
Android
Git
HTML
CSS
Native App Development
Muhammad I.
San Sebastian, Spain
$30/hr
5.0
45 jobs
🚀 Top-Rated Developer & Machine Learning Expert | 100% Job Success | 5+ Years of Experience
Welcome! I'm Muhammad Ibrahim, an experienced developer specializing in Mobile App Development and Machine Learning solutions. My mission is to help startups and enterprise-level businesses thrive by turning innovative ideas into robust, high-quality, and scalable technology solutions.
🔹 Mobile Development Expertise:
Native App Development (Swift, Kotlin)
Cross-Platform Apps (Flutter, React Native)
Custom UI/UX Design
Backend Integration (REST APIs, Firebase)
App Performance Optimization
Third-party API Integrations
Agile Methodology & Project Management
🔹 Machine Learning Expertise:
Customized ML and Deep Learning Model Development
Natural Language Processing (Chatbots, Text Summarization, Sentiment Analysis)
Computer Vision (Image Classification, Object Detection, Image Segmentation)
Model Deployment and Integration (APIs, Docker, Kubernetes)
Comprehensive ML Pipelines and MLOps
Data Preprocessing, Feature Engineering, and Automation
🔹 Technical Skills:
Programming: Python, Swift, Kotlin
ML Frameworks: TensorFlow, PyTorch, Scikit-learn, Hugging Face
Cloud Platforms: AWS SageMaker, Azure Machine Learning, Google Cloud AI Platform
DevOps: Docker, Kubernetes
🔹 Certifications:
AWS Certified Developer – Associate
AWS Certified Machine Learning – Specialty
Azure AI Engineer Associate
TensorFlow Certified Developer
🔹 Industries Served:
E-commerce & Retail
Healthcare & Fitness
Education & eLearning
Finance & Fintech
Social Media & Networking
Travel & Hospitality
IoT
🔹 Why Partner With Me?
Certified Expertise: Extensive industry-recognized certifications.
Proven Track Record: Consistently delivering successful projects on-time and within budget.
Transparent Communication: Regular updates, clear communication, and collaborative processes.
Quality-Oriented Approach: Maintainable code and scalable solutions aligned with industry best practices.
Continuous Support: Committed to your long-term success.
Ready to elevate your business with exceptional mobile and AI-driven solutions?
📩 Let's discuss your project today!
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