Hire the Best Android Developers
in Spain

Senior Android & Kotlin Developer | Kotlin Multiplatform | Jetpack Compose I'm a Mobile Developer with 7+ years of experience building and maintaining production Android applications used by 100K–500K+ users. I help startups and businesses build reliable, scalable mobile apps — from MVPs to products. Whether you need a new application from scratch, modernize an existing codebase, improve performance, or add new features, I can take ownership of the entire development process. What I can help with • Android app development (Kotlin, Java) • Jetpack Compose UI development • Kotlin Multiplatform (shared Android/iOS business logic) • App architecture (MVVM, MVI, Clean Architecture) • Legacy code modernization and refactoring • Performance optimization and bug fixing • REST API integration • AdMob, Google Play Billing, subscriptions, and in-app purchases • Firebase Analytics & Crashlytics integration • Bluetooth, Wi-Fi Direct, WebRTC, and Android Auto • Computer Vision with MediaPipe Technologies Languages: Kotlin, Java, Coroutines Android: Jetpack Compose, Android SDK, Room, SQLite, WorkManager, Navigation, Material Design Architecture: MVVM, MVI, Clean Architecture, Modularization Networking: Retrofit, OkHttp, Ktor, REST APIs Dependency Injection: Hilt, Dagger 2, Koin Testing: JUnit, Mockito, Espresso Cross-platform: Kotlin Multiplatform (Android/iOS), Flutter Tools: Git, Gradle, CI/CD Why clients work with me • 7+ years of commercial Android development • Experience delivering apps from concept to Google Play • Strong focus on clean, maintainable, and scalable code • Clear communication and reliable delivery • Comfortable working independently or as part of a distributed team If you're looking for an experienced Android developer who can quickly understand your product and deliver high-quality solutions, I'd be happy to discuss your project.

I am a seasoned iOS/macOS developer with over 6+ years of experience building high-performance applications across iPhone, iPad, macOS, and watchOS platforms. I focus on delivering clean, scalable, and maintainable solutions with strong attention to detail and product quality. I have experience working on MVPs and startup launches, as well as advising on technical architecture and product development. My expertise includes native iOS development (Swift, SwiftUI, UIKit) and backend integration using Firebase. I work with startups and small to medium-sized businesses, helping them build, scale, and improve their digital products efficiently within budget and timeline constraints. Key highlights: * Apps with 100,000+ monthly active users * Successful MVP launches with early user acquisition via TestFlight * Product scaling that increased user base by 40% What you can expect when working with me: * Clear and transparent communication * Fast response times and structured updates * Technical consulting tailored to business needs * Smooth collaboration with distributed teams * Strong focus on quality, performance, and maintainability * Full support during development and transition phases I’m open to new opportunities and collaborations.

Need someone who can build, stabilize and scale your Android product? You found him 🤝 📊 12+ years exp. as a Mobile App developer 📊 20+ Android-focused projects 📊 10+ years with regulated and business-critical products 📊 30+ production Android development release cycles 📊 5+ years in Kotlin-first mobile development with Flutter expertise 📊 4 product areas: compliance-ready apps, secure payments, backend-heavy systems and Software Development I help companies build secure, maintainable apps for Healthcare, FinTech, consumer products. Mobile App Developer Core Expertise 🔹 Native Android engineering with modern architecture, Software Design 🔹 Kotlin-first development for maintainability 🔹 Legacy modernization Java to Kotlin 🔹 Product delivery for Healthcare, FinTech, consumer platforms, Mobile App Development I’m an android developer focused on reliability, clean architecture. As a kotlin developer, I build scalable solutions with android kotlin best practices, Jetpack tooling, 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 complex products. I support android app development for secure solutions where every android app stays maintainable after launch. I improved 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 ✅ Backend communication, authentication and payment integrations ✅ Performance optimization, debugging, maintenance and release support My strongest specialization is android developer kotlin work. As a android developer kotlin java I modernize legacy code, migrate modules and improve release quality without a full rewrite. My java developer experience supports an android kotlin developer approach to 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, transaction-safe flows 🔸 Backend integrations with PHP, Python, JavaScript, and REST APIs 🔸 Collaboration with iOS, backend, QA, full stack developer ai 🔸 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 a codebase as a mobile developer, I focus on release readiness and ai mobile app development. 🔸 Mobile App Development: Kotlin with Jetpack, Compose, Android SDK, AOSP, Swift, Java, React Native, Flutter, Hybrid App Development, Mobile App Redesign, Mobile App Design 🔸 Core Mobile Architecture & Tools: MVVM, Clean Architecture, modular apps, scalability-first mindset, Android Studio, Git, release workflows, crash analysis 🔸 Backend & API Integration: REST APIs, RESTful API Integration, secure auth, payment gateways, mobile app development API, Node.js, JavaScript, PHP, Python, C#, SQL backend alignment, Firebase, secure cloud services 🔸 Web & Cross-Platform Technologies: React, Angular, HTML, CSS, WordPress, Desktop Application Development 🔸 Testing, Quality & Process: Mobile App Testing, Smartphone application optimization, CI/CD, Agile Software Development Alongside native Android, I work as a flutter developer and support flutter mobile app development. My flutter app developer experience complements Android delivery. I collaborate with a react native developer on shared workflows, coordinate with a hybrid app developer when architectures overlap, and align with a react developer or web app developer on connected flows. I also collaborate as an ios developer ( ios app developer ) on cross-platform alignment, including iOS Development discussions with Swift teams. This helps me operate as an android developer, flutter developer and product-minded mobile app developer within cross-functional teams. 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, nor 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.

I have been developing Android applications for over 14 years, with extensive experience building and maintaining production apps. I also have hands-on experience developing iOS applications. I have a strong understanding of the full mobile app development lifecycle, from initial concept and architecture through development, testing, and publication to the App Store and Google Play. Over the years, I have worked with a wide range of libraries, frameworks, APIs, and third-party services. I take a thoughtful and responsible approach to every project. I believe it is important to fully understand the requirements and the underlying problem before starting implementation, and I always aim to find the most practical and reliable solution rather than simply writing code to meet the immediate requirements. I hold a Bachelor's degree in Computer Science.

Hi! I’m Bogdan — a Mobile Developer & Product Strategist with 15+ years of experience helping startups and enterprises bring ideas to life through clean code, smart design, and measurable results. I lead a European development team recognized by Clutch among: 🏆 Top 100 Mobile Development Teams in Europe 🏆 Top 30 Flutter Developers What You Get I focus on building products that are fast, stable, and user-loved — not just apps. Clients come to us when they need to: ✅ Turn an idea into a working MVP in 6–8 weeks ✅ Rebuild or scale an existing mobile app ✅ Integrate AI assistants, chatbots, or recommendation engines ✅ Improve UX and retention through research and design Tech Stack Mobile: Flutter, Swift, Kotlin, React Native Backend: Java, Python, PHP (Laravel), Django, Firebase AI & Automation: OpenAI API, LangChain, custom LLMs Design: Figma, Adobe Suite, UX research, prototyping Our Process 1) Discovery & Scoping – align tech and business goals 2) Design & Development – transparent weekly sprints 3)Testing & Launch – QA, analytics, and release support 4) Post-launch support – flexible maintenance and scale-up Why Clients Choose Us ⭐ Fast & proactive communication (no agency bureaucracy) ⭐ Transparent time tracking (Upwork hourly or milestone) ⭐ Stable European team — not freelancers on rotation ⭐ Code ownership 100% belongs to you Let’s build something your users will love — and that actually moves your business forward. Send a quick message with your idea or challenge, and I’ll reply within a few hours.

Transforming complex business bottlenecks into high-performance, enterprise-grade software ecosystems. I am a specialized Full-Stack Software Developer and Technical Project Manager focused on engineering premium, highly scalable applications. If your business is seeking innovation through seamless hybrid software development, I architect intelligent digital products that bring that vision to life with absolute precision across Web, iOS, Android, and Desktop platforms. Going beyond standard app development, I build robust systems designed for massive scale, complex data processing, and absolute UI stability. From rapid MVP prototyping to enterprise-level deployments, I ensure a flawless user experience and top-notch backend architecture. 🚀 Core Competencies & Services: Cross-Platform Frontend Engineering: Expert-level FlutterFlow and Dart development for seamless 1:1 feature parity across all devices. Enterprise Architecture: Offline-first mobile synchronization strategies, complex reactive state management, and high-volume data handling. Backend & Serverless Infrastructure: Advanced implementations using Firebase Realtime Database, Supabase, PostgreSQL, and SQLite. AI & API Integrations: Serverless Cloud Functions, custom REST API ecosystems, and third-party processing services. Data Analytics & Modeling: Deep relational database architecture, Google Data Studio, and real-time KPI aggregations. End-to-End Delivery: Premium UI/UX Design, Agile Project Management, and complete product lifecycle oversight. I don't just write code; I partner with you to engineer secure, production-ready platforms that drive real business results. Send me a message, and let's schedule a strategic meeting to discuss the exact technical architecture needed for your next major launch. (Search Engine Optimization Tags) [ SEO Tags: Full Stack Developer, FlutterFlow Expert, Dart Developer, Mobile App Development, iOS Developer, Android Developer, Desktop Application, Web App Developer, Software Architect, Offline-First Architecture, Firebase Cloud Functions, Supabase Backend, PostgreSQL Database, SQLite, API Integration, Custom API, OAuth 2.0, Stripe Integration, UI/UX Designer, Wireframing, MVP Builder, Agile Project Manager, SaaS Development, Artificial Intelligence Integration, System Integration, Database Architecture, Google Data Studio Analytics, KPI Dashboards, Backend Developer, Frontend Developer, Spain Developer, Europe Freelancer ]