Hire the Best Flutter Developers
in Ukraine

Mobile developer with 14 years experience, 80+ shipped apps and more than 1M+ downloads. If you're starting a Flutter app from scratch, I take it from concept to the App Store. If your iOS or Android app has stalled, I get it shipping again. If a previous mobile app developer missed what you actually needed, that's where I usually come in. 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗴𝗲𝘁 I work primarily in Flutter for smartphone apps, with native iOS and Android experience dating back to 2012. When backend or AI work is heavy, Python and Node.js handle it. Mobile app design happens early by a dedicated mobile app designer. 𝗪𝗵𝗮𝘁 𝟴𝟬+ 𝗮𝗽𝗽𝘀 𝘁𝗮𝘂𝗴𝗵𝘁 𝗺𝗲 Mobile app development starts with understanding the problem the product solves. A Flutter developer worth hiring flags problems before they become rebuilds. A few projects I've shipped as a mobile app developer: - Patient Gateway (UK) - Flutter app for medical transport with Firebase sync - Rheo (Switzerland) - Flutter app and PWA for vital signs via BLE biosensor - Inne Minilab (Germany) - fertility tracking with IoT BLE biosensor - ClosetBee (US) - Flutter AI wardrobe app, the kind of work I take on as an AI mobile app developer - MoveOn (Israel) - eco taxi app with route planning and payments - Warehouse App Set (UK, NDA) - 5 native apps for inventory and dispatch 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 Healthcare, logistics, transportation, lifestyle, internal tools, AI integrations, fintech, travel, education. If you're looking for a mobile application developer or Flutter developer who thinks past the spec, that's the work I do. I've had clients reach out a year into a project after hiring the wrong mobile app developer first. Early hire saves months. Send a message with what you're building and I'll give a scope estimate and the first technical decision I'd want to settle. 𝗥𝗲𝗮𝗱𝘆 𝘄𝗵𝗲𝗻 𝘆𝗼𝘂 𝗮𝗿𝗲 Best, Stan --- - Experienced mobile app developer and experienced app developer with 80+ apps for iOS and Android since 2012, and 14 years as a mobile developer. - Senior mobile app developer leading architecture on every project, with MVPs launching in 8 to 12 weeks. - Senior Flutter developer with 20+ Flutter builds, first TestFlight usually in client hands by week 3. - Flutter app developer with user bases from a few thousand to 100,000+ monthly active. - iOS developer with 30+ apps published to the App Store and average ratings around 4.4 stars. - Senior iOS developer working in Swift with Objective-C and SwiftUI. - Senior iOS engineer shipping to iPhone, iPad, and Apple Watch with users in 15+ countries. - Android developer with 35+ Play Store apps across logistics, healthcare, and consumer categories. - Senior react native developer with a partner team with 30+ React Native apps and 5+ react native dev iterations on legacy code, plus mobile React and React developer logic across 3+ codebases for React native mobile app developer projects. - Full-stack developer running Node.js, Firebase, Supabase, and Python backends with APIs serving up to 100K+ requests per day. - Full stack developer process cuts bugs by ~60%. - Flutter mobile app developer work spans 25+ apps, including one Flutter app with 1M+ downloads on App Store. - Full-stack mobile app developer and web developer work covers dashboards cutting reporting time ~70% on 20+ projects, with Wordpress marketing sites alongside the mobile launch. - Native app development uses Swift for iOS work and Kotlin with Java for Android development. Hybrid app development uses Flutter and React Native. - iOS Development and Android App Development cover 65+ App Store and Play Store apps. - Backend runs in Laravel and Node.js with Python for AI, JavaScript and PHP for scripting. HTML and web design support webpages and admin panels. - API integration for payments, maps, auth. User profile creation is standard in every MVP. Mobile app bug fix work makes up roughly 20% of engagements. - Healthcare app development and healthcare SaaS development include data handling with HIPAA or GDPR compliance. Secure PHI handling and HL7 FHIR integration are standard. Rheo and Inne Minilab ship medical device BLE integration. Healthcare app developer engagements typically run 8 to 16 weeks. - Logistics app development covers real-time map integration, route planning, and inventory dispatch. Logistics app developer projects ship with offline sync and live tracking from day one. Flutter is my main stack, with 30+ Flutter projects shipped to production in the last four years. Flutter development treats mobile app performance as scope from day one. MVP mobile app development is where most projects start. App development quality matters most at MVP stage, and mobile app marketing readiness comes before launch. Where FlutterFlow fits the early phase, I work as a FlutterFlow developer compressing timeline by ~60%. Mobile app development FlutterFlow work happens when MVP is live but the team needs a Flutter developer to ship.

🌿 🌿 🌿 Hi, I am a 𝗙𝗟𝗨𝗧𝗧𝗘𝗥 developer with more than 𝟯 years of experience . And 𝟭𝟬+ years of experience in 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 development .

Hi, I'm Eldar, your future technical partner here on the Upwork :) ⚡ AI-streamlined delivery: expect a working MVP in 1–2 weeks. I'm a senior Flutter Developer and full stack developer at Dreambit with 10+ years in full-cycle Mobile App Development, and I use AI across the whole workflow — planning, code generation, testing, and review — to compress timelines where that is possible without cutting corners. I've delivered 50+ apps with 100K+ downloads and a consistent 5-star rating, working with startups, agencies, and enterprise clients to plan, build, and scale products that thrive in the real world, going well beyond the traditional mobile app developer role. As a dedicated flutter app developer, I ship iOS Development, Android App Development, and Web from a single Flutter Stack + Dart codebase — one source of truth running natively on every smartphone, which is how I keep delivery fast and maintenance low across those 50+ launches. Need to move quickly on an MVP? I work as a flutterflow developer to validate ideas in days. Need depth? I hand-write flutter for complex products and build rock-solid flutter firebase backends (auth, Firestore, Cloud Functions, push) — including offline-first sync engines with conflict resolution, payments, and real-time sessions that hold up at 100K+ users. I'm also a seasoned React Native Developer with deep React experience. If your product runs on react native mobile, I cover react native expo and bare workflows, native react native ios builds, polished Android UI, and fluid 60fps react native animation. Plenty of clients arrive needing mobile app development react native support and stay for a cleaner, unified foundation — whether you're hiring your first react developer, replacing a previous react native developer, or migrating off one entirely, I make the transition painless. Beyond the app I work as a web developer, building secure APIs and admin panels with Node.js, NestJS, TypeScript, and Python, integrating cleanly with whatever you already run — including a legacy Laravel backend — so your mobile app and web dashboard stay in sync. My stack: Flutter, Dart, React Native, Firebase, Node.js, TypeScript, JavaScript, Swift, Kotlin, Java, Python. I also add AI features that feel native to the product — orchestrating LLM workflows, intelligent agents, and "chat with your data" setups with guardrails and cost control, so you get real utility, not buzzwords. As a senior mobile application developer, I own the full lifecycle: thoughtful mobile app design and UI/UX (a big reason behind that 5-star rating), plus practical input on mobile app marketing and store optimization so your launch actually lands. Industries: Healthcare, Fintech, Social & dating, Meditation, Astrology, and E-commerce — including secure, regulated environments. We handle compliance-heavy projects and stay current with EU and US rules, and we're registered in both the US and EU, so billing and invoices are never a problem. You can check our quality right now in the stores — this year we've already shipped 7 apps (15 last year), and "release" never means we walk away: many products run on a 6-month roadmap with updates every 2–4 weeks. I act as your partner across the whole journey — consultation, technical decisions, design, or publishing help — you can count on me and my team. We don't just deliver the project; we flag the risks and find the fastest path to your ROI. And if you need help with an existing app — a rescue, or lifting conversion and retention — my experience is fully at your disposal. Dreambit cares — whether you're non-technical, just starting your development journey, scaling an existing business or app, or you need serious expertise in mobile development and AI integration for your product or a wider service offering. If what you're really after is reliable, honest work here on Upwork, you've found the right team. Why Dreambit: ✅ Total Ownership from Day One — you hold the keys to all source code, repositories, and accounts, and always see exactly what you're paying for through clean, meaningful commits. ✅ Guaranteed Pricing & "No Demo, No Invoice" — we never exceed our pessimistic estimates unless scope changes; milestone payments are strictly tied to live demos of working features. ✅ Transparent Team, No Subcontractor Secrets — the team you meet is the team that builds your product; direct access to your developers, no bait-and-switch, no unvetted offshore handoffs. ✅ Extreme Ownership & Weekly Demos — no finger-pointing, no hiding from calls; proactive weekly updates, and if a challenge arises, we bring solutions, not excuses. ✅ Built-in QA & Warranty — built to scale, not to break; work is "done" only after rigorous UAT, backed by a one-month bug-free warranty on every invoice. 📩 Message me for a free 30–60 min consultation and I'll share my Upwork scheduler link

🟢 𝘼𝙫𝙖𝙞𝙡𝙖𝙗𝙡𝙚 𝙉𝙤𝙬 🏅 𝙎𝙚𝙣𝙞𝙤𝙧 𝘼𝙄 𝙈𝙤𝙗𝙞𝙡𝙚 𝘼𝙥𝙥 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙚𝙧 | 𝙍𝙚𝙖𝙘𝙩 𝙉𝙖𝙩𝙞𝙫𝙚 & 𝙁𝙡𝙪𝙩𝙩𝙚𝙧 | 𝙞𝙊𝙎, 𝘼𝙣𝙙𝙧𝙤𝙞𝙙 & 𝘼𝙄 𝙄𝙣𝙩𝙚𝙜𝙧𝙖𝙩𝙞𝙤𝙣 👨‍💻 I build production-ready mobile apps for iOS and Android using React Native, Flutter, AI integration, scalable APIs, Firebase, Node.js, and Python. I help startups, founders, and growing businesses turn app ideas into clean, fast, reliable mobile products from MVPs to fully launched App Store and Google Play applications. My focus is simple: build mobile apps that look polished, feel smooth, scale properly, and include smart AI features that create real value for users. 🤖 𝑾𝒉𝒂𝒕 𝑰 𝑫𝒐 𝑩𝒆𝒔𝒕: • 📱 Mobile App Development for iOS and Android • ⚛️ React Native app development • 🐦 Flutter app development • 🧠 AI App Development and AI feature integration • 🤖 AI Chatbots, Claude, OpenAI, and LLM-powered workflows • 🔗 API Integration with third-party services • 🔥 Firebase authentication, database, push notifications, and cloud functions • ⚙️ Backend development using Node.js and Python • 🚀 App Store and Google Play deployment support ⚡ 𝑾𝒉𝒚 𝑪𝒍𝒊𝒆𝒏𝒕𝒔 𝑯𝒊𝒓𝒆 𝑴𝒆: ✔ I build apps with clean, scalable architecture ✔ I understand both mobile frontend and backend logic ✔ I can add AI features without making the app slow or messy ✔ I write maintainable code that future developers can understand ✔ I care about UI quality, performance, and real user experience ✔ I can take an idea, existing app, or MVP and move it toward launch 🧩 𝑨𝑰 + 𝑴𝒐𝒃𝒊𝒍𝒆 𝑨𝒑𝒑 𝑭𝒐𝒄𝒖𝒔: I do more than connect an app to an AI API. I help design useful AI-powered mobile experiences, including: • AI assistants inside mobile apps • AI chatbots for customer support, coaching, education, and productivity • Claude / OpenAI-powered app features • Smart recommendations and automation workflows • Voice, text, and document-based AI features • AI-powered dashboards and user insights • Backend logic for secure and reliable AI processing 🏗️ 𝑻𝒆𝒄𝒉 𝑺𝒕𝒂𝒄𝒌: ⇢ Mobile: React Native, Flutter, iOS, Android, Hybrid App Development ⇢ iOS: Swift, iOS Development, App Store deployment ⇢ Android: Android App Development, Google Play deployment ⇢ Backend: Node.js, Python, REST APIs, API Integration ⇢ AI: Claude, OpenAI, AI Chatbots, Artificial Intelligence, AI App Development ⇢ Database & Cloud: Firebase, Firestore, Authentication, Cloud Functions ⇢ Product: MVP development, production apps, performance optimization, app maintenance 🚀 𝑾𝒉𝒂𝒕 𝑰 𝑫𝒆𝒍𝒊𝒗𝒆𝒓: ◈ Cross-platform mobile apps ◈ AI-powered iOS and Android applications ◈ React Native and Flutter MVPs ◈ Firebase-based mobile platforms ◈ Backend APIs for mobile apps ◈ AI chatbot and assistant features ◈ App performance improvements ◈ App Store and Google Play ready builds 📩 𝑳𝒆𝒕’𝒔 𝑩𝒖𝒊𝒍𝒅 𝒀𝒐𝒖𝒓 𝑴𝒐𝒃𝒊𝒍𝒆 𝑨𝒑𝒑 If you need a developer who understands: 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 + 𝐀𝐈 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 + 𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞 + 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 + 𝐢𝐎𝐒 + 𝐀𝐧𝐝𝐫𝐨𝐢𝐝 + 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 Send me a 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 or 𝗶𝗻𝘃𝗶𝘁𝗲 me and let's discuss the project

🌟8+ Years Experience | 50+ Projects | 20,000+ Hours | $900K+ Earned | Upwork Top Performer | Flutter Developer | Mobile App Developer I’m a Flutter developer, mobile app developer, full stack developer, and web developer with 8+ years of experience building, fixing, and scaling mobile products for startups and growing companies. My work spans mobile app development, web development, and backend-connected product work, with a strong focus on clean architecture, smooth user experience, reliable delivery, and scalable app development. I’ve worked across Flutter, Flutter Dart, Flutter Firebase, React, React Native, Xamarin developer projects, Xamarin Forms, Xamarin.Forms, .NET MAUI developer builds, Swift developer work, SwiftUI, iOS, Android, iOS developer tasks, iOS Swift, Android developer tasks, Android Kotlin, Kotlin, native app developer projects, AI app development, MVP development, API integration, and cross platform mobile app architecture. I also support teams that need a practical full stack developer who can connect mobile apps with APIs, dashboards, cloud services, and web systems without slowing the project down. That mix of mobile app development and web development lets me work across the full product, not just one part of it. On Upwork, I’ve delivered 50+ projects, earned $800K+, and worked 20,000+ hours helping clients launch MVPs, modernize old apps, fix unstable codebases, and move products into production. That experience taught me how to balance speed with quality, especially when a project needs to ship quickly but still be stable enough for real users. It also taught me how to work with different teams, different product stages, and different technical constraints without losing momentum. For new products, I help with MVP development from concept to launch. For existing products, I step in to improve architecture, refactor weak areas, and make the app easier to maintain and scale. If you’re building a cross platform mobile app, I can help choose the right direction between Flutter, React Native, .NET MAUI, Xamarin migration, or native app development depending on the product goals, timeline, and long-term plan. I focus on making those choices practical, not trendy, so the app can grow without becoming harder to manage. I’m also a strong fit for AI app development projects where the product needs more than a basic interface. That might mean smart workflows, automated actions, backend logic, or API integration that connects the app to real business systems. In those projects, I pay close attention to stability, data flow, security, and the user experience, because a useful feature only matters if it works reliably in production. 💡 Areas I specialize in - SaaS and startup MVP development - from idea to production-ready MVP. - Cross platform mobile app architecture - Flutter, React Native, and .NET MAUI. - App modernization and legacy migration - Xamarin to .NET MAUI, Flutter, or React Native. - API integration and backend connectivity - for apps that need stable data flow and real-time features. - AI app development and product automation - for teams that want smarter app experiences. - Continuous delivery, refactoring, and codebase optimization - to keep existing products moving forward. - Mobile app development for iOS and Android - with a focus on stability, performance, and usability. - Full stack developer support - when mobile work needs web, API, or backend coordination. - Native app developer support - when the project needs platform-specific quality and performance. - React Native developer support - for teams already working in JavaScript-based mobile stacks. - Swift developer and iOS developer support - for polished Apple ecosystem apps. - Android developer support with Kotlin - for strong native Android performance. - Flutter developer support - for fast cross platform mobile app delivery. - Xamarin developer support - for legacy apps that need modernization or migration. - .NET MAUI developer support - for teams moving toward a modern Microsoft stack. - Cross platform mobile app delivery - when one codebase needs to support iOS and Android efficiently. I’m a good fit when you need a mobile developer who can think beyond screens and help shape the full product. Whether the goal is a fresh MVP, a native app for iOS or native Android or a cross platform mobile app that can grow over time, I focus on code quality, maintainability, and practical results. I also make sure the work stays aligned with product goals, so the app is not just built well, but built in a way that supports growth and future updates. 🚀 If you need a Flutter developer, React Native developer, Xamarin developer, .NET MAUI developer, Swift developer, iOS developer, Android developer, Kotlin developer, mobile app developer, web developer, MVP development specialist, API integration expert, or full stack developer who can bring structure to a complex build and get it shipped, I’m ready to help.

INTERESTS * PROGRAMMING * GAME DEVELOPMENT AND DESIGN * MOBILE APP DEVELOPMENT * AI AND MACHINE LEARNING * UI/UX DESIGN