Hire the Best iOS Developers
in Hungary

🥇 $1M+ earned | 100% JSS | 1,000+ projects | 18 years in Mobile Development 🤝 We build iOS and Cross-Platform Apps using Swift/Objective-C and React Native 🎓 From lean MVP to Top-rated product Hi there! I'm driving Mobile Development at NIX - a global software engineering partner with 32 years of overall experience and over 18 years in Hybrid App Development particularly, 60+ in-house mobile developers, and a portfolio of 1,000+ successful projects. We provide comprehensive development services and create apps for Smartphones, Tablets, Wearables, Web, and TV. We build from scratch products that increase engagement, retention, and revenue. And we help stabilise existing apps, increase performance, reduce crash rates, and improve overall stability. Let’s ensure your concept is validated for the real world and turn it into a top-rated iOS app that drives real ROI. ✅ We can help you with: ➜ Full-cycle custom iOS and React Native development, POC, and MVP creation. ➜ Dedicated teams and Staff Augmentation. ➜ Consulting/Speeding up time to market for new features or products through efficient architecture and scalable code. ➜ Legacy modernization, enhancing or refactoring existing applications, improving performance and user experience. ➜ Ongoing and post-production support, ensuring that your app continues to grow and adapt to user feedback or new updates. We utilise AI where it brings tangible value, accelerating our work on your projects and reducing operational time by up to 50% without compromising on architecture decisions, cybersecurity, or code quality. Notable project outcomes include: Supply Chain: Reduced spoilage by 15% by developing an IoT system to monitor cargo temperature and location. Marketplaces: Streamlined buying and selling processes by developing CarSoup (automotive) and HomesGo (real estate video tours). Healthcare and IoT: Created a diabetes management platform and built an IoT Telehealth app enabling orthopedic monitoring via an AR-based app. Fintech: Enabled instant microlending by building a "Credit as a Service" platform. Education: Optimised a 3D anatomy platform, reducing app size by 30–40%. Consumer Engagement: Increased engagement and retention level by rebuilding the Montel Energy Viewer app with SwiftUI, supported a 5-million-user AI-powered video app, and developed the Alienware Arena gaming portal. Infrastructure: Improved scalability and performance by refactoring the affirmation app. 🔹 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬: Platforms and Languages: iOS (Swift, Objective-C), React Native&Typescript. Payments & Subscriptions: PayPal, Stripe, Apple Pay. Communication: Real-time audio/video calls, live streaming with Socket, Firebase, Twilio, and Agora. In-App Features: Push Notifications, QR & Barcode Scanner, Image Recognition, Map Integration. Geolocation: Google Maps, real-time. Security: 2FA, OAuth. App Store: Publish and update apps on Google Play Store & Apple App Store with compliance. Maintenance and Optimisation: Bug fixing, feature upgrades, stabilisation. Why Clients Choose NIX: 🏆 18+ years in Mobile Development | $1M+ earned on Upwork | 100% Job Success. 🛠 Full-Cycle Expertise: From bold idea to go-to-market strategies. ⚡ Fast & clear communication: Always aligned & transparent. 🧪 Flexibility: From Prototype to scaling products to millions of users. 📅 Available to start immediately. Let’s schedule a 30-min discovery call where I’ll help you evaluate your idea, define the right strategy, and outline a roadmap to bring your product to life.

iOS App Developer | Frontend Web Developer (React) ⭐ 6+ years in iOS development ⭐ 4+ years in Frontend Web development ⭐ Worked in multiple startups as an iOS developer, independently designed and developed several iOS and full-stack apps ⭐ Some experience with the following technologies: Backend development, Desktop app development (Electron), Cross Platform Mobile development (React Native), Shopify development, LangChain, ChatGPT, OpenAI, LLMs, Stable Diffusion 👉 Delivered / worked on projects that focused on: - Healthcare, mobile games, e-commerce, fashion, web games, AI content generation 👉 Technology stack: 📲 𝐍𝐚𝐭𝐢𝐯𝐞 𝐢𝐎𝐒 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Swift, UIKit, SwiftUI, SpriteKit, Realm, Core Data, RxSwift, Combine, REST API, MVC, MVVM-C, Redux, Unit, UI Testing, Fastlane, Circle CI, Git, GitHub, CocoaPods, SPM, Sketch, Figma 🌐 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐖𝐞𝐛 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: HTML, (S)CSS, Tailwind, JavaScript, TypeScript, React, Next.js, Google Cloud, Firebase, Google Analytics, Web Scraping, Netlify, Vercel, Stripe, Google Maps API 🏗 𝐒𝐨𝐦𝐞 𝐨𝐭𝐡𝐞𝐫 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐈'𝐯𝐞 𝐮𝐬𝐞𝐝 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐚𝐬𝐭: Shopify, Electron, React Native, LangChain, OpenAI, ChatGPT API, LLMs 👉 Some projects I worked on: 𝐢𝐎𝐒 𝐚𝐩𝐩𝐬: ✅ Vivid: Vivid is an AI image generator app with lots of preset styles and a public feed where you can browse through AI art created by other users. I built the app using SwiftUI with MVVM-C architecture. The app uses Firebase Authentication. The images are generated using Stable Diffusion on a serverless backend running on Google Cloud. The backend is a collection of Cloud Functions written in TypeScript. ✅ CopDeck: I developed and released a sneaker price comparison and inventory management iOS app for sneaker resellers that included a web scraping algorithm using Google Cloud, back-end, and the CopDeck landing page built with Next.js, TypeScript, Tailwind and Netlify. ✅ LabTwin: A niche digital assistant for pharmaceutical industry scientists used to improve productivity by reducing note-taking. I worked for them as an iOS developer. My work involved building UI components in UIKit, building the app's persistence layer using Realm, setting up CI pipelines and automated testing. ✅ SidelineSwap: SidelineSwap is an e-commerce store for used sporting goods. My responsibilities were modernizing the app UI, improving software architecture by implementing the MVVM-C pattern, rebuilding the payment checkout flow. ✅ Ball Smasher: Ball Smasher was a mobile game built for iOS using 2D physics engine (SpriteKit). The game reached the top of iOS App Store charts, achieving 7M+ downloads and 4.5/5 rating from 64K+ reviews. I was the lead developer of the game and the co-founder of the company who released it. ✅ Other iOS games: I developed and released 4 simple iOS games. My games have been played by 100K+ people. 𝐖𝐞𝐛 𝐚𝐩𝐩𝐬: ✅ GameGuide AI (currently under development): I developed a game guide AI chatbot using OpenAI, LangChain, React, Next.js, TypeScript, Firebase and Google Cloud functions. Currently the chatbot can only answer questions about the popular game, Skyrim. The training data for the bot is scraped from the largest Skyrim wiki website, and stored in a vector database. ✅ Hide & Seek World: Independently designed and developed a web-based real-time multiplayer game. The game has had 100K+ players to date and currently reaches 500 daily active users. It was selected for Google for Startups Cloud Program and received $4000 in free Google Cloud credits. Features include multiple game modes for 2-100 players, leaderboards, private matches, and a games stats dashboard. I developed it using Next.js, TypeScript, Firebase and Google Cloud serverless functions. ✅ Shopify e-commerce store: I developed a Shopify-based portfolio website & e-commerce store for selling jewelries.

I am a full-stack mobile app/web service developer. During my 25-year programming experience, I have succeeded in many projects with different technologies and programming languages be it an embedded system or an encrypted mobile communication service. I have always enjoyed helping give birth to a new app or service. In my work, my code is very simple: to remove your headache. I am interested in: - Cordova Plugin development - Capacitor Plugin development - Hybrid app development (React Native/Ionic/Cordova) - React JS development - AWS, Firebase, - API development - Android native app development - iOs native app development(Objective-C/C++) - Integrating/migrating your legacy (C/C++) lib to Android (JNI, NDK) - ME(R/A)N(Mongo/Express/React Native/Angular/Node) projects Whether it is a project of 15+ or of a single developer you can count on my 15+ years of experience in the mobile/embedded industry, ps: I am sorry that I haven't taken any tests, but having sites with all the solutions for the tests makes them quite difficult to rely on.

💡 Over the past 10 years, I’ve built high-performance web, mobile, and AI-powered applications that drive real business value. My expertise spans React, Vue, Next.js, Node.js, Python, Flutter, and React Native, delivering robust SaaS platforms, Single Page Applications (SPA), and AI-driven solutions. 📈 My work powers businesses across fintech, healthcare, AI, and e-commerce, with applications that have scaled to millions of users and generated significant revenue. Whether you need an AI-powered chatbot, a scalable SaaS product, or a mobile app, I bring deep technical expertise and strategic thinking to the table. 🔹 Looking for a reliable, long-term tech partner? Let’s chat! I specialize in helping enterprise companies scale their platforms efficiently. Now TOP RATED PLUS on Upwork! 🟢 KEY SKILLS 🌟 Full-Stack & SaaS Development: ✔️ Architecting scalable web & mobile applications with React, Vue, Next.js, and Node.js ✔️ Backend expertise with Express, FastAPI, and Nest.js ✔️ API development & integration (REST, GraphQL, WebSockets) ✔️ Authentication & security: OAuth, JWT, Firebase Auth 🌟 Mobile App Development: ✔️ React Native, Flutter, Swift, Kotlin for cross-platform and native apps ✔️ UI/UX expertise with Material UI, Tailwind CSS, and SwiftUI ✔️ Performance optimization and CI/CD for seamless updates 🌟 AI & Machine Learning: ✔️ AI-powered solutions using OpenAI, LangChain, TensorFlow, PyTorch ✔️ Chatbots, AI agents, and NLP-based applications ✔️ Recommendation systems and predictive analytics 🌟 Cloud & DevOps: ✔️ Cloud deployment on AWS, Google Cloud, Firebase, and DigitalOcean ✔️ CI/CD pipelines with Jenkins, GitHub Actions, Fastlane ✔️ Scalable databases: PostgreSQL, MongoDB, Firebase Firestore 🌟 Data Management & Testing: ✔️ Database design & optimization (SQL, NoSQL) ✔️ Unit & integration testing with Jest, Cypress, Mocha, XCTest ✔️ AB Testing, analytics, and performance monitoring 🔥 Why Work With Me? ✅ Full-cycle development: From idea validation to launch & scaling ✅ Enterprise-ready solutions: Robust, maintainable, and scalable architecture ✅ Proven track record: Apps with millions of users & high revenue generation ✅ Long-term partnerships: I work closely with teams to ensure continuous growth 📩 Let’s build something amazing! Contact me today for a free consultation 🚀