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Recent Upwork client feedback: "Completed the work in record time. It worked first time and was a very clean solution. Highly recommended." Senior Android Engineer with 10+ years of experience building, modernising, and stabilising production mobile applications across enterprise, logistics, insurance, fintech, healthcare, and field-service environments. Specialised in Kotlin, Java, and cross-platform .NET mobile development (Xamarin and .NET MAUI), with extensive experience in offline-first architectures, enterprise integrations, device connectivity, and business-critical operational systems. I help clients with: Android modernisation & production support • Crash fixing, ANRs, debugging, and production issue resolution • SDK upgrades and Google Play compliance fixes • Legacy Java/Xamarin app modernisation • Performance optimisation and application stabilisation Android & cross-platform development • Native Android apps using Kotlin and Java • Xamarin to .NET MAUI migrations and cross-platform mobile development • API integrations, authentication, and real-time systems • Existing codebase maintenance and feature development Enterprise & integration expertise • Zebra and Honeywell scanner integrations • Bluetooth peripherals and connected devices • SSO, OAuth, and enterprise authentication systems • Offline-first workflows and synchronisation • Warehouse, logistics, retail, and field-service platforms • Real-time messaging and SignalR systems Clients value my ability to quickly understand existing codebases, resolve production issues efficiently, and deliver clean, maintainable solutions. I’ve worked across greenfield builds, enterprise modernisation projects, and live production systems with active users and business-critical workflows. Whether you need a production issue resolved, a modern Kotlin feature implemented, a legacy Android application modernised, hardware devices integrated, or a Xamarin/.NET migration completed, I can help deliver a robust and reliable solution quickly.

📱 With a robust background as an iOS developer since 2010 and an Android developer since 2015, I specialize in developing versatile, enduring, and reliable mobile application solutions tailored for the Digital Goods market, with a particular focus on 📖 e-books and 🎧 audiobooks. Additionally, I have extensive experience crafting solutions for various industries including Productivity, Shopping, Education, and Medical sectors. I prioritize proficient project and resource management to ensure timely delivery and adherence to budgetary constraints ⏰💰. 🔄 A meticulously devised software development strategy is crucial for the success of any product. When collaborating with clients, I design and implement processes that promote efficient and seamless teamwork, both internally and in client-facing interactions. I advocate for an agile approach to software development and actively solicit client feedback throughout the project lifecycle. 📈 I am convinced that this structured approach is pivotal for the timely and effective execution of products that align with client objectives. This methodology has empowered me to assist clients in developing applications for diverse platforms, tailoring solutions to meet specific market demands and client needs. ✅ In addition to proficient coding skills, I highly value responsibility, responsiveness, and reliability. These qualities are what I guarantee to my future clients and appreciate in my existing clients. I am seeking long-term projects where I can take full responsibility for my work and have the commitment to maintain the solutions I build over time. 📱𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐚𝐧𝐝 𝐓𝐨𝐨𝐥𝐬 🛠️ 🧑‍💻 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬 • Objective-C • Swift • Kotlin • Java • Flutter • React Native • SQL • Python • Ruby • AppleScript 📦 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬 & 𝐀𝐏𝐈𝐬 & 𝐦𝐨𝐫𝐞 • UIKit • AVKit • SwiftUI • SwiftData • Core Data • Core Location • Store Kit • Android Jetpack • DI (Hilt) • Navigation • Compose • Room • Coroutines • LiveData • Flow • Social APIs • REST • App Extensions • MVI • MVVM (Data-Binding) • Design Patterns • Clean Architecture • Digital Rights Management (DRM) 🔧 𝐒𝐃𝐊𝐬 & 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐓𝐨𝐨𝐥𝐬 • xCode • Android Studio • Build Scripts • PSPDFKit • Colibrio Reader • Readium LCP 📂 𝐒𝐨𝐮𝐫𝐜𝐞 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 • Git 🎵📄 𝐌𝐞𝐝𝐢𝐚 & 𝐅𝐢𝐥𝐞 𝐅𝐨𝐫𝐦𝐚𝐭𝐬 • ePub • ePub3 • PDF • HLS • MP3 📞 If you are looking for reliable resources and planning for a long-term, enjoyable journey for your existing or future mobile application, don't hesitate to schedule an introductory call with me. I can share my expertise in detail. Let's take your business to the next level with modern mobile solutions. 🚀

We close the gap between fancy AI-built apps that crash on scale and too expensive old-school approach development. By combining 15+ years of deep engineering foundation with a specialized AI-driven delivery workflow, our small senior team operates as a "force multiplier." We deliver the architectural complexity of a 10-person agency with the speed and cost-efficiency of a single senior lead. We don’t just "use AI" - we’ve re-engineered the development lifecycle to remove the two biggest bottlenecks in mobile dev: management overhead and repetitive coding tasks. ● AI-Augmented Architecture: Instead of a bloated agency team, you work directly with a compact senior cell. We use AI internally to automate routine coding, freeing us to focus entirely on complex architecture, and externally to embed LLM agents into your app, replacing heavy backend infrastructure ● Senior-Only Execution: We use 15+ years of experience to design the architecture and set up precise, automated quality gates. We validate the codebase, ensuring everything functions perfectly as a whole without accumulating technical debt 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗚𝗲𝘁 We can build your project from zero or pickup existing codebase. ● Full-Cycle Ownership: End-to-end delivery including technical breakdown, UI/UX oversight, backend integration (Node.js/Python), and App Store deployment ● From "Lovable" to Scalable: We take your MVP and ensure it has an enterprise-grade foundation. No technical debt that forces a rewrite after your first 1,000 users ● Code Recovery & Audits: We step into "messy" or incomplete projects, identify architectural bottlenecks, and refactor them into stable, scalable products 𝗢𝘂𝗿 "𝗡𝗼-𝗥𝗶𝘀𝗸" 𝗚𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲 ● 48-Hour Technical Assessment: Within two days of our first call, you receive a realistic breakdown, a fixed-estimate proposal, and a clear path to production ● Production-Quality from Day One: If our code audit doesn't reveal actionable improvements in your current project, we’ll tell you for free. We stand by "Clean Architecture" that your future in-house team can easily maintain 𝗪𝗵𝘆 𝗨𝘀? In a world of "GPT-wrappers" and junior developers, we are the architects who stayed hands-on. We are the only team that combines 15 years of "old-school" engineering discipline with a "superhuman" AI-augmented workflow to get you to production while others are still in discovery. 𝗛𝗼𝘄 𝘁𝗼 𝗦𝘁𝗮𝗿𝘁 ① Message us with a brief summary of your project (even if it's messy or incomplete) ② We’ll conduct a quick technical sync to understand your goals ③ Get your roadmap: Within 48 hours, you’ll have a clear execution plan to reach production-ready status I'd be happy to discuss the idea and help determine the best technical approach.

I've been working as Android Team Lead for 7 years. I have strong experience in team management, team supporting and mentoring. Has grown specialist from Junior to Senior. Can manage team resources and dedicate an appropriate team member to a project. At the same time, I'm a developer and have strong Java and Kotlin knowledge. I've worked on Android application where cryptography was used. Well experienced in application development for banks and credit organizations. Worked on multimedia projects like audio players, trains schedule. Good knowledge in code review, know and use Java/Kotlin best practices and development patterns, follow Clean architecture and can create a stable and reliable application for your business and clients. I possess the following technical skills: Android skills: Activity, Fragments, ContentProviders, Services, Multithreading Frameworks: Retrofit, Dagger2, Room, Navigation and etc. Languages: Kotlin, Java Additional Software: Git, Jira. Methodology: Scrum, Agile

Android & Flutter developer with 5+ years of experience building and scaling mobile applications used by millions. • Built and contributed to apps with 15M+ downloads and 4.8★ Play Store rating • Maintained 99.9% crash-free rate in production apps • Developed international casino & betting platforms • Worked on 7 commercial mobile products — from MVP to large-scale apps • Strong experience with Kotlin, Flutter, Jetpack Compose, Firebase

🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 ✅ Mobile App Developer 7+ years of experience ✅ SaaS Mobile App Developer 5+ years ✅ 35 mobile app development jobs completed successfully ✅ Android and iOS Mobile Expert ✅ Built 27+ UX-first Mobile App development jobs for 22 companies ✅ On-Time and Cost-Effective Delivery ✅ Future-Proof Solutions Showing a Minimum 41% ROI ✅ 4354 mobile app development hours on Upwork and still counting ✅ 100% Job Success in mobile app development (Client Satisfaction Ratio) ✅ 98% of Clients Recommended working with me ✅ 80% Long-term Repeat Clients ✅ 7+ years of experience in mobile app development, 6 years experience in iOS mobile app development, 7 years experience in Swift and Kotlin, 4 years experience in Flutter, React Native, 2 years experience in KMM, KMP Full stack mobile app developer and mobile app UI UX designer with 7+ years of experience in Mobile App Development, specializing in iOS, Swift, Android, Kotlin, KMM, Kotlin Mutliplatform / KMP, React Native, and Flutter. I have successfully delivered 120+ mobile applications in different roles as mobile app developer, flutter app developer, flutter full stack developer, flutter flow, mobile app design, mobile ui ux designer, swift ios developer, android developer, kotlin developer, react native developer, mobile game developer achieving a 5-star rating on Upwork and helping clients scale their businesses with high-performance solutions. Apart from mobile app development, I specialize in Mobile App Design for both iOS and Android, as well as Web App Design for SaaS platforms. My expertise extends to Interaction Design, User Flow Design, and creating seamless User Experience (UX Design) and User Interface (UI Design). I follow a Design Thinking approach, ensuring every solution is user-centered and problem-solving. My process includes UI/UX Wireframing, Prototyping, and building Style Guides or UI-kits for consistent branding. I perform Design Audits and Design QA to maintain high standards across all projects. 🛠️ Design Tools: My designs come to life through powerful tools like Figma, Zeplin, and InVision for prototyping and collaboration. I leverage Adobe Illustrator, Adobe Photoshop, and Adobe XD for detailed visual design. For complex wireframes and flow mapping, I turn to Axure, Sketch, and Balsamiq. I also use Miro and Abstract for brainstorming and version control, while project communication and management happen in Slack and Jira. Our Expertise at a Glance • Mobile App Development: Android, iOS, & Cross-Platform App Development using Java, Kotlin, Swift, Objective C, Flutter, and more. • Website and Full Stack Development: Crafting seamless back-end experiences with .Net, Python, Java, Javascript, React.js, Angular.js, Node.js, MERN, MongoDB, PHP, etc. • Logo & UI/UX Design: Bringing your ideas to life with Adobe XD, Photoshop, Sketch, Figma, etc. • End-to-End Solutions: From logo design, UI/UX development, workflow setup, testing to deployment in app stores, we've got it all covered. We do not use v0.dev lovable.app CursorAI, Cursor, Windsurf, Trae, GitHub Copilot, Tabnine, Qodo, Devin AI, and AutoDev for speed up coding, we know other methods to do it efficiently. We offer a comprehensive range of development services across mobile, web, and cloud platforms. Our mobile app development expertise includes building Android and iOS applications using technologies such as Flutter, Swift, Objective-C, React Native, and Xamarin, optimized for both smartphones and tablets with a focus on cross-platform compatibility. In website and full stack development, we work with .NET technologies, including full stack .NET development, .NET Core, and Python with Django. Our team is experienced in developing both backend systems and user-friendly, responsive web interfaces, as well as working with various CMS platforms. Our DevOps and DevSecOps capabilities cover cloud infrastructure and automation, leveraging tools like AWS, Azure, Docker, Kubernetes, GitLab CI, Ansible, and Terraform to build secure and scalable deployment environments. We also build cross-platform and web applications using frameworks like Three.js and design tools such as Webflow, creating visually engaging and functional user experiences across devices. Additionally, we are well-versed in integration and automation tools, including WebSockets, data integration, the ABP Framework, Discord API, and Autotask, allowing us to create seamless connectivity and workflow automation between systems. Talent Good Knowledge, Talented, Experienced, Skilled, Strong Experience, Proven Experience, Agency, Team, Company, Specialist, Proven Track Record, Strong Background, Write Clean Code, Deep Expertise, Bring to Life, Cross-platform, Attention to Detail, Long Term. ⚡️ AVAILABLE FOR NEW PROJECTS ⚠️ Press Invite Button on my page and let's talk.