Hire the Best Android Developers
in Portugal

I build high performing Mobile Apps for ambitious brands. If you need a reliable Mobile App Developer or Flutter Developer, I deliver results as a dedicated Cross-Platform Developer, iOS Developer, and Android Developer. Buggy interfaces, crashing screens, and messy State Management are killing your user retention and eating into your profit margins. Let me fix that. I specialize in iOS & Android Development that scales, using a rigorous, manual coding approach to ensure rock-solid Mobile Architecture. I do not rely on brittle, auto-generated AI shortcuts; I build the foundational infrastructure from scratch so your product actually works and scales without breaking. Whether you need immediate Technical Debt Rescue for a stalled app, intensive Legacy Code Refactoring, or rapid MVP Development engineered correctly from day one, I deliver Custom Mobile Solutions focused on flawless user experiences and App Performance Optimization. Here is how I drive real business results through clear, high-quality app development: Bringing your new app idea to life: Starting entirely from scratch? I take your vision and build a rock-solid app from day one. Instead of rushing a messy prototype, I write clean, custom code from the ground up so you launch a polished product that actually works saving you from expensive rewrites down the road. Making it easy for users to pay you: I build smooth, simple checkout screens and subscription setups. If your payment process is frustrating, people will leave without buying. I fix those roadblocks so your app generates reliable revenue and you stop losing sales at the finish line. Fixing broken apps to save your ratings: Have an app that crashes, lags, or freezes constantly? Users will delete it and leave bad reviews. I step in to rescue messy code and clean it up from the inside out. The result is a stable, crash-free app that keeps your users happy and protects your brand's reputation. Building fast apps that grow with you: Nobody likes a slow app. I write solid infrastructure by hand without relying on lazy AI shortcuts so your product stays lightning-fast. Whether you have a hundred users or a hundred thousand, your app will feel smooth, responsive, and ready for growth. Stop losing users to slow load times and broken features. Message me with your biggest current app bottleneck or your Figma design link, and I will give you a free, straightforward technical assessment on exactly what it will take to fix it or launch it. Keywords: Senior Mobile Developer, Flutter Architect, Dart FFI, iOS Swift, Windows Desktop, macOS Native, Clean Architecture, BLoC Pattern, Supabase, CI/CD, App Performance, Technical Debt Rescue.Mobile App Developer, Flutter Developer, iOS and Android App Development, Cross-Platform Developer, Mobile Apps, Mobile Architecture. Senior Mobile Developer, MVP Development, App Performance Optimization, Firebase Integration, Supabase Expert, CI/CD Pipelines, GitHub Actions, Legacy Code Refactoring,Flutter Architect, Clean Architecture, BLoC Pattern, State Management, Dart FFI, C++ Integration, Desktop App Development, Technical Debt Rescue.

I help startups and growing teams design, operate, and optimize reliable cloud platforms with a strong focus on scalability, cost control, and long-term maintainability. I’m a senior DevOps and Platform Architect with hands-on production experience across Azure, AWS, and on-prem environments. I’ve worked with both Kubernetes-focused startups and large enterprises, including AT&T and Dish Wireless, where I supported customer-facing platforms and complex cloud infrastructure. My work typically begins where generic DevOps support ends—when systems become difficult to scale, cloud costs start growing unpredictably, or teams need a platform they can confidently run in production. What I specialize in • Production-grade Kubernetes platforms on AKS and EKS, including private clusters • Ingress and traffic management using NGINX, Application Gateway, and internal load balancers • Secure cloud networking, VNET/VPC design, and hybrid connectivity • Infrastructure as Code ownership using Terraform across multi-cloud and on-prem environments • CI/CD pipelines for applications and infrastructure • Cloud cost optimization and FinOps-focused architecture improvements • Practical AI-assisted DevOps tooling to improve visibility, documentation, and operational decision-making How I work I primarily work on monthly retainers, acting as a long-term DevOps and platform partner rather than a short-term task executor. Typical engagements include platform audits, infrastructure redesigns, cost optimization initiatives, and ongoing ownership of cloud and Kubernetes environments. Background • Worked with Kubernetes-focused companies such as Magalix (Weaveworks) and Kasten(dot)io (Veeam) • Delivered customer projects for AT&T and Dish Wireless • Multi-cloud production experience across Azure, AWS, and on-prem • Certified Kubernetes Application Developer (CKAD) • AWS Developer Associate • Terraform Associate • Udacity DevOps Engineering Nanodegree • Bachelor’s degree in Computer Science If you’re looking for a DevOps partner who can design and operate complex platforms, reduce operational risk, and think ahead about scale, cost, and reliability, I’d be happy to discuss how I can help.

🚀 Hey there! I'm your mobile app wizard! 😃 For over seven years, I've been transforming ideas into stunning mobile applications as a Senior Android developer. My expertise is mostly in the Android platform, and I'm proficient in Kotlin, Java, Swift, Flutter, Android SDK. Here’s a glimpse of what I bring to the table: ✅ Client-server applications with REST GraphQL APIs Apollo ✅ Productivity tools ✅ Social networking applications ✅ Health and wellness platforms ✅ Sport applications ✅ Utility software ✅ AI-driven solutions with ChatGPT OpenAI integration ✅ Audio player apps I have a strong foundation in Object-Oriented Programming and Design OOP OOD, and my skills extend to networking, local data, user interfaces, and deployments. I'm a proponent of design patterns and adhere to development methodologies like Scrum and Agile, always enriching the development process with my insights. Key Skills: ✔️ Cross-Platform Development: Flutter, Dart, In-App Purchases, Performance Optimization, Push Notifications, Localization, Facebook SDK, Google SDK, Firebase, Riverpod, Provider, GetX. ✔️ Android Development: Java, Kotlin, Android Studio, XML Layouts, Activities, Fragments, Material Design, Android SDK, SQLite, Room Database, Gradle, Android App Architecture, Push Notifications, Firebase, RESTful API Integration, Recycler View, Dependency Injection Dagger Hilt, Jetpack Components ViewModel LiveData Navigation, UI, UX Design, Responsive Design, Geolocation, Maps Google Maps API, Performance Tuning, Data Binding, Android NDK, Gradle Plugins, App Distribution, Accessibility, Firebase, Firebase Analytics.

Greetings, With over 15 years steeped in the world of software development, I’ve dedicated a significant portion of my professional journey to crafting high-quality iOS applications. The path from conceptualizing an idea to witnessing its tangible transformation on an iPhone or iPad is one I've walked many times. As the director of a software testing studio, I bring not only development expertise to the table but also a rigorous standard for software quality and performance. Every application tells a story, and my team and I are committed to ensuring that story is told seamlessly. If you're seeking a seasoned perspective and a reliable hand in bringing your iOS vision to fruition, I invite you to connect. Let's embark on this journey together. Warm regards. Kiryl