Hire the Best Kotlin Developers
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Need a Flutter app that scales to millions of users? I build cross-platform mobile products: iOS, Android, FinTech wallets, AI-powered tools that ship fast and grow revenue. FxPro: 15M+ users, multiple international awards. What sets me apart is the rare combination of Flutter depth and full-stack reach. I've architected apps from a 3-month FinTech MVP (Grineo, launched 50% faster than average) to a 15M-download trading platform (FxPro). I work across Flutter, KMP, Swift, Kotlin, React, and Python — so I can own the entire product, not just one layer. Here's what I deliver: 📱 Cross-platform mobile apps - Flutter, KMP (Kotlin Multiplatform), Swift, Kotlin 🌐 Scalable web - React, Next.js, Node.js, .NET Core 🤖 AI & Computer Vision - Python, PyTorch, YOLO, real-time video analysis ☁️ Cloud & security - AWS, Docker, PCI-DSS compliance, PassKey encryption Whether you need an MVP in 90 days or a production system built for 10M+ users, I map out the architecture first so you never rebuild from scratch. 📌 FxPro - architected native mobile apps and high-load backend for a 15M+ download trading platform. Won multiple international awards. 📌 Grineo FinTech Wallet - launched secure MVP in 3 months, 50% faster than industry average, with PassKey encryption. 📌 Volga Surf Camp KMP App - increased service usage 2-4x, reduced admin workload by 3x. 📌 PPE Detection System - real-time AI safety monitoring on construction sites using YOLO and PyTorch. ⭐ 5.0 rating | Top Rated on Upwork | Certified: Flutter Development (Udemy), Full-Stack Web & Mobile (Coursera) I take on a maximum of 3 active clients at a time to give every project focused attention. Send me a message with a brief description of your project and I'll respond within a few hours with a clear next step!

Hello! Looking to transform your idea into a cutting-edge mobile, web, or game experience? 💡 I'm pleased to offer a 𝐅𝐑𝐄𝐄 𝟒𝟎-𝐦𝐢𝐧𝐮𝐭𝐞 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 to understand your vision and outline the ideal strategy for your project. With over 10 years of experience in mobile, web, and game development, I bring a versatile skill set to deliver reliable, high-quality solutions tailored to your needs. 🔹𝐆𝐚𝐦𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐃𝐞𝐬𝐢𝐠𝐧: -Unity: C# for engaging gameplay and interactive elements. -UI/UX: Figma, Photoshop for intuitive, user-friendly designs. 🔹 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: -Android: Kotlin, Java for robust, scalable apps. -iOS: Swift for seamless, high-performance iOS experiences. 🔹 𝐖𝐞𝐛 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: -Frontend: JavaScript, TypeScript, Vue.js for responsive, engaging interfaces. -Backend: Python, Django for secure, scalable server-side solutions. I am dedicated to quality, clear communication, and delivering results that exceed expectations. Let’s make your project a success together!

Available today. 𝗪𝗿𝗶𝘁𝗲 𝗺𝗲 𝗵𝗲𝗿𝗲 on Upwork. I reply within one business day, usually within 30 minutes. For existing projects, I can run a code audit. For new projects, I can prepare an MVP roadmap. Operational & data platforms for multi‑location and B2B businesses - booking, smart search, and offline field ops, with AI built in. My focus is reliable production systems, observability, performance, and long-term support. Results: - Increased revenue 2× - $𝟕.𝟓 𝐦𝐢𝐥𝐥𝐢𝐨𝐧 𝐭𝐨 $𝟏𝟓 𝐦𝐢𝐥𝐥𝐢𝐨𝐧 - with a mobile app for managing 200+ spa salons. - Built an MVP from scratch in 6 months and reached $30K in revenue. Because I work across mobile, backend, and frontend, you get a developer who understands the entire system - not just one layer. This means faster delivery, fewer blockers, and a product that feels cohesive end‑to‑end. I join teams as a true technical partner, not just a task‑taker: I help refine requirements, propose better solutions, and keep the project moving forward with clarity and momentum. 🚀 What I bring to your project: - 15+ years of engineering experience across mobile, backend, and frontend - Full ownership of the product lifecycle - from architecture to deployment - Clean, maintainable, scalable code built for long‑term growth - Fast onboarding, proactive communication, and daily progress updates - Experience with startups, MVPs, SaaS platforms, marketplaces, PropTech, booking apps 📱 Mobile Development (React Native & Flutter) Cross‑platform apps that feel native, perform smoothly, and scale effortlessly. Keywords: React Native developer, Flutter developer, mobile MVP, native modules, offline‑first, real‑time features, App Store / Google Play deployment. 🧩 Backend Engineering (Laravel & FastAPI) Robust, secure, scalable APIs and backends for mobile and web products. Keywords: API development, SaaS backend, multi‑tenant architecture, microservices, database optimization, real‑time features, payment integration. ⚙️ DevOps & Reliability Engineering CI/CD pipelines, zero‑downtime deployments, autoscaling, monitoring, alerting, and production stability. Keywords: DevOps engineer, uptime, observability, SRE practices, Docker, Kubernetes, cloud infrastructure. 🤖 AI Integration & LLM Features AI search: natural language search, visual similarity search, interior-aware recommendations, semantic search, vector search, and LLM-powered discovery features Keywords: AI integration, LLM development, vector search, multimodal AI, AI SaaS features, PropTech AI.

$300k+ earned on Upwork • 50 successful projects • 11,000+ logged hours I specialize in taking over existing mobile projects and helping teams ship reliable products. My strength is quickly understanding complex codebases, solving difficult production issues, improving architecture, optimizing performance, and preparing applications for successful App Store and Google Play releases. I contribute effectively as an individual developer, Tech Lead, or part of an existing engineering team. I have over 20 years of software development experience, including 10+ years building native iOS and Android applications and 7+ years developing cross-platform apps with Flutter and React Native. My experience includes startups, enterprise products, and large-scale mobile platforms serving hundreds of thousands to over one million users. I've worked on marketplaces, social networks, fintech products, delivery platforms, education systems, location-based applications, messaging platforms, and AI-powered mobile solutions. What I can help with • Flutter development (iOS & Android) • React Native development • Native iOS (Swift, SwiftUI, Objective-C) • Native Android (Kotlin, Java) • Backend development (Node.js, NestJS) • Firebase (Authentication, Firestore, Cloud Functions, Storage, FCM) • REST APIs, WebSockets, WebRTC • Architecture improvements • Performance optimization • Production bug fixing • Code refactoring • Technical audits & code reviews • App Store & Google Play releases • Team leadership & mentoring AI & Computer Vision I also build AI-powered mobile features and backend-connected AI workflows, including: • OpenCV • YOLO-based object detection • Image processing pipelines • AI-assisted mobile features • Backend AI integrations • Modern LLM integrations Technologies Flutter • React Native • Dart • Swift • SwiftUI • Objective-C • Kotlin • Java • Node.js • NestJS • Firebase • Firestore • PostgreSQL • REST APIs • WebSockets • WebRTC • OpenCV • YOLO • Clean Architecture • MVVM • MVP • SOLID Why clients work with me ✔ Fast onboarding into existing projects ✔ Strong experience with large production codebases ✔ Architecture improvements instead of temporary fixes ✔ Production-first mindset ✔ Clear communication and transparent progress ✔ Reliable delivery and predictable execution ✔ Comfortable working independently or leading engineering efforts If your project needs an experienced engineer who can quickly understand an existing codebase, solve complex technical challenges, and help deliver a stable, production-ready application, I'd be happy to discuss how I can help.

Android Developer with 5+ years of experience in building, improving, and maintaining mobile applications. I specialize in Kotlin and modern Android development, including Jetpack Compose, XML, Coroutines, Room, Retrofit, Ktor, Dagger, Koin, Clean Architecture, MVVM, MVI, and MVP. I have experience with multi-module architecture, local data storage, REST API integrations, background services, CI/CD with GitHub Actions, Google Play publishing, debugging, refactoring, and performance improvements. I also have strong Android reverse engineering experience, including JADX, Smali, Frida, LSPosed, Charles Proxy, SSL pinning bypass, APK analysis, and modification. My goal is to deliver clean, stable, and maintainable solutions that are easy to scale and support.

2001-2006, BSc of Engineering from Satbayev University. I’m software developer & researcher, former competitive programmer, author of the book titled "Computer Science Explained"