Hire the Best Flutter Developers
in Spain

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Vadim P.

Barcelona, Spain

$45/hr
5.0
22 jobs

Need someone who can build, stabilize and scale your Android product? You just found him 🤝 📊 12+ years in mobile delivery 📊 20+ Android-focused projects 📊 10+ years supporting regulated and business-critical products 📊 Experience with compliance-ready apps, secure payments, backend-heavy systems and Software Development I help companies create secure, maintainable, high-performance apps for Healthcare, FinTech and consumer products. Core Expertise 🔹 Native Android engineering with modern architecture and Software Design 🔹 Kotlin-first development with maintainability in mind 🔹 Legacy modernization from 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 products where reliability and clean architecture matter. 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 ✅ 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 ✅ Solo delivery or collaboration inside a larger team My strongest specialization is android developer kotlin work. I often join teams that need android developer kotlin java skills to modernize legacy code, migrate modules, and improve release quality without a full rewrite. That work benefits from practical experience as a java developer and from thinking like an android kotlin developer who can handle new features and stabilization. Relevant Experience Highlights 🔸 Healthcare mobile applications with compliance-aware architecture 🔸 Performance optimization and crash-rate reduction 🔸 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, and web teams 🔸 Ability to scale from one engineer to a delivery team I also have experience with android ble and android bluetooth features for pairing flows and 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. Tech Stack 🔸 Android kotlin with Jetpack, Compose, Android SDK, AOSP 🔸 Java, Firebase, secure cloud services, CI/CD 🔸 REST APIs, secure auth, payment gateways 🔸 Node.js, JavaScript, C#, SQL for 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 and 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
  • Android
  • AOSP
  • Kotlin
  • Node.js
  • Android App Development
  • Swift
  • iOS Development
  • PHP
  • Java
  • JavaScript
  • React Native
  • C#
  • SQL
  • Software Design
  • Application Improvement
  • Software Development
  • Software Debugging
Manuel P.

Salamanca, Spain

$15/hr
5.0
1 jobs

Experienced Mobile Applications Developer with extensive expertise in cross-platform development within the software market. My recent professional work includes integrating machine learning algorithms using Python and developing mobile applications for the Spanish marketplace. I have been involved in a variety of projects, ranging from startups to multinational corporations with branches in multiple cities worldwide. I am proficient in Python, Dart, React, and Typescript, and have a solid foundation in networks and protocols, enabling me to implement sockets, webhooks, deploy APIs, and more with ease. Additionally, I have significant experience with Postgres and cloud-based microservices platforms such as Supabase and Firebase. The architecture of my latest project was based on the Bloc pattern, simulating an MVC model and organizing files in a structured manner. I am enthusiastic about teamwork and possess excellent communication skills, which help me collaborate effectively with diverse teams. I am confident that my skills and enthusiasm will contribute significantly to your project's success. I am excited about the opportunity to participate in and contribute to innovative projects. Kind regards, Manuel.

  • Apache HTTP Server
  • Python
  • Microsoft Active Directory
  • Java
  • PHP
  • Kali Linux
  • Network Engineering
  • C
  • Microsoft Virtual Server
  • Algorithm Development
  • Network Administration
  • Wireshark
  • Network Architecture
  • Infrastructure Management
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!

  • Flutter
  • Dart
  • Firebase
  • Mobile App Development
  • Startup Company
  • Kotlin
  • iOS
  • Android
  • Figma
  • API Integration
  • Android App Development
  • Node.js
  • RESTful API
  • Amazon Web Services
  • Responsive Design
  • UX & UI
Amine B.

Malaga, Spain

$100/hr
4.9
11 jobs

👋 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
Volodymyr V.

Lloret de Mar, Spain

$44/hr
5.0
1 jobs

I provide a React Native Developer team that ships cross-platform iOS and Android apps surviving real users 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 engineers and stay accountable for delivery. Why hire my React Native Developer team: - 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 As a React Native Developer team we ship cross-platform iOS and Android from a single TypeScript codebase. The React Native Developer team owns the pipeline from architecture to App Store and Google Play - native modules, push, IAP, Apple Pay / Stripe and OTA. After a junior react native engineer leaves a broken build, the team rebuilds with react native developer expo / EAS, react native tailwind UI and react native expo / OTA. Founders also hire my React Native Developer team 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 team owns the API. When a brief calls for deep native work, the team fields a swift ios developer and a dedicated swift developer on the iOS side, plus a swiftui developer when the UI layer is SwiftUI-first. On the Android side the same loop runs with an android developer kotlin, a kotlin developer for modern Android and a java kotlin developer for legacy migrations off older Java code. The iOS App Developer and Android App Developer roles cover store submission, native API integration and platform review, while an app developer ios android brief means one team owning both platforms end to end. When the API and the app belong together I staff a full stack mobile developer, and a react developer keeps the web and admin side aligned with the mobile build. Mobile App Development here is a loop: discovery, mobile app design, build, submission, analytics, next version. Across native iOS, native Android and react native mobile codebases the team picks the right tool per feature. It handles 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. Mobile App Development is also where mobile app marketing hits code - release notes and IAP config inside the plan. As a Mobile App Developer team led by React Native Developer engineers we own the part most Mobile App Developer teams underestimate - everything from dev to live stores with paying users. A solid Mobile App Developer team knows reviewers, manifests, rejections and payment edge cases. The team 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. As a mobile app developer ukraine team we are time-zone-friendly to EU and EST. Clients hire my React Native Developer team when they need: - a React Native Developer team to ship iOS and Android from one codebase - a Mobile App Developer for full-cycle Mobile App Development from idea to store - 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 - 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 by the React Native Developer and Mobile App Developer team: - Digital ID verification app. KYC, QR identity, multi-profile, inbox. Laravel + Node.js + MySQL + Redis on AWS. - Two safety apps. Native iOS/Android for spam call/SMS filtering and opt-out, React Native + Swift + Kotlin. - Travel app. App Store/Google Play pipeline, native push, IAP, analytics. - Global marketplace app. Listings, messenger, subscriptions, payments. Core stack: React Native, TypeScript, Swift / SwiftUI, Kotlin / Java, native iOS/Android, Flutter, Node.js, Laravel, PostgreSQL, Stripe, Firebase, Apple/Google Pay, OTA. Need a React Native Developer team, Mobile App Development partner or Mobile App Developer team that delivers and stays long-term - let's talk. Most clients who start with one engagement come back for the next phase.

  • Flutter
  • Firebase
  • Mobile App Development
  • React Native
  • React
  • iOS
  • Android
  • iOS Development
  • Android App Development
  • Swift
  • MongoDB
  • TypeScript
  • Node.js
  • HTML
  • CSS
  • Native App Development
  • JavaScript
  • Git
  • Redux
  • App Development

How it works

Post a job for free Post a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a Flutter Developer in Spain on Upwork?

You can hire a Flutter Developer in Spain on Upwork in four simple steps:

  • Create a job post tailored to your Flutter Developer project scope. We'll walk you through the process step by step.
  • Browse top Flutter Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top Flutter Developer profiles and interview.
  • Hire the right Flutter Developer for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a Flutter Developer?

Rates charged by Flutter Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Flutter Developer in Spain on Upwork?

As the world's work marketplace, we connect highly-skilled freelance Flutter Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Flutter Developer team you need to succeed.

Can I hire a Flutter Developer in Spain within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Flutter Developer proposals within 24 hours of posting a job description.