Aliaksandr H.

AI engineer & agent developer, fullstack iOS/JS/TS/React/React Native

Hello! I'm an AI engineer, full-stack iOS/Android/PHP/JavaScript/TypeScript/React/React Native developer and problem solver with more than 17 years of experience. Specializing in MERN and LAMP stacks, artificial intelligence (AI) and AI agents. I embrace modern AI-powered development workflows using tools like 🤖 Claude Code, 🧠 Cursor, 🏄 Windsurf IDEs and 🌀 Codex. What I do: 📱 Mobile apps, 🖥️ Desktop apps, 🌐 Websites, ⚙️ Web services, 👨🏻‍💻 Admin Backends, 🧩 API for them, 🤖 AI agents and ChatGPT/Claude integrations. 🚀 My own products: I don't only build for clients — I have three apps live on the App Store, each shipped end to end alone, from idea to release, and kept running. 🕰️ Insight Countdown is a countdown app for iPhone, iPad and Mac: SwiftUI, SwiftData, private iCloud sync, widgets, and an alarm that rings through silent mode and Focus. 📶 WiFi QR Studio turns a network into a print-ready, frameable card laid out at exact physical size. 🔠 See Text puts the texts you keep being asked for on your device's full screen in large type or as a QR code, or copies them to the clipboard — license plate number, phone number, email, booking reference, etc. All three have multilingual marketing sites in Astro and Tailwind. So when I estimate your project, I'm estimating work I've done for myself — store review, crash reports, support and updates included. 🤖 AI agents: I've shipped an AI agent handling inbound marketplace leads for live paying customers. It acts on an external event with nobody pressing anything, takes real actions in the world (replies to a person in chat, sends SMS, starts a phone call), follows up hours and days later, keeps conversation state and changes its own later behaviour from what it reads. What separates that from a demo is predictability, and that's where the engineering goes: making bad output structurally impossible to send rather than asking the model nicely, idempotent delivery so a retry can't message someone eleven times, and switches that fail toward the safe side. Kinds of software I've created: 🛍️ Shopping & online stores, 🏃 Sports, 🎮 Games, 🧘 Medicine & well-being, ✈️ Travel, 💰 Bank systems, 📣 Ad networks, 🛡️ Insurance, 🛬 Landings. I have strong skills in the following programming languages: 📜 TypeScript, ☕ JavaScript, 🦅 Swift, 🎯 Objective-C, 🐘 PHP, 🐱 Kotlin, ☕ Java. Frameworks and technologies: 🦕 Deno & Node, ⚛️ React, ⚛️ React Native, 🤖 ChatGPT API, 🔮 Anthropic AI API, 🌟 Google Gemini API, 🅰 Astro, ⚡️ Vite, 🐻 Zustand, ⚛️ Electron, 🆁 Redux, 🆁 Redux Toolkit, 🐆 Nest js, 🅽 Next js, 🆅 Vue, 🐆 Fastify, 🥤 Fresh, 🅰 Apollo GraphQL Client and Server, 🔌 Relay, 🅼 MobX, 🌳 Koa, 🅴 Express js, 📈 GraphQL, 😎 Swagger, 💨 Tailwind, 🦅 SwiftUI, 💾 SwiftData, ☁️ CloudKit, ⏰ AlarmKit, 🧩 WidgetKit, 🎥 Lottie Files, 🥤 Cocoa Touch, 🥥 Cocos2D, 🅻 Laravel, 🎵 Symfony, 🆈 YII and YII2, 🔥 CodeIgnitor, 🆉 Zend Framework, 📍 CoreLocation, 🎥 CoreAnimation, 🏠 Apple HomeKit, ❤️ Apple HealthKit, 💰 Superwall, 💳 Stripe, ☎️ Twilio. Databases: 🍃 Mongo, 🐬 MySQL, 🪶 SQLite, 🍉 Watermelon DB, ⚡️ Supabase, 🔥 Firebase, 🐘 Postgres, 📄 TypeORM, ➡️ Doctrine, ⚪ DynamoDB/PartiQL, 🔴 Oracle, 🅲 CoreData, 🟣 Realm. I design the schemas too — relational and NoSQL, with indexing and query performance in mind. Cloud Computing: 🔺 AWS (Lambda, DynamoDB, SQS, EventBridge, S3, CloudFront, EC2), 🌥️ Google Cloud Platform, 🐳 Docker, ☸️ Kubernetes, ☸️ Google Kubernetes Engine, 🌊 DigitalOcean, 🅷 Heroku, 🆁 Render, ☀️ Netlify, ▲ Vercel, 🟠 Cloudflare, 🅰 Microsoft Azure. Serverless and edge functions, plus deployment and hosting on about half my projects. I have developed over 20 iOS apps, 15 React Native apps, several Android apps, APIs for some of them, over 20 websites, and shipped my own products to the App Store. I'm proficient in problem-solving, with a solid track record of fixing complex problems teams had struggled with on their own — usually performance issues or hard-to-track bugs. How I work: ⚡ I reply fast and I'm easy to reach — quick responses are what clients mention most. 🕒 Based in Europe: in sync with European clients, day shifted later for US ones, and I've worked across Asian time zones too. 🎯 I work autonomously: give me the goal and I'll plan it, ask what actually matters, and keep you posted. 💡 I don't just execute tickets — I treat your project as my own and tell you when I see a better way. 🧵 I've worked in around 15 teams, and can also deliver an app, API or server entirely on my own, turnkey. Languages: 🇬🇧 English C1, 🇷🇺 Russian and 🇧🇾 Belarusian native, 🇵🇱 Polish B1. I like to explore new technologies and build software of any complexity. I follow best practices, test thoroughly, and write clean, readable code any other developer can maintain.