Full-Stack & Mobile Engineer (React, Next.js, Node.js, React Native, n8n, Supabase) ▪ 10 years I help startups and growing companies build high-quality web apps, mobile apps, and backend systems using React, Next.js, Node.js, React Native, TypeScript, Supabase, and PostgreSQL. I turn messy codebases and unfinished features into clean, fast, stable applications — web, mobile, and backend. I build MVPs in weeks, automate workflows with n8n, and ship production-ready releases at a predictable pace. My work has supported teams at Google, MIT, FedEx, and IPG Photonics (LightWeld used in SpaceX supply chain). Why me: 🏅 Top Rated Plus ▪ 100% Job Success ▪ $700k+ earned 10 years of hands-on full-stack, mobile, and backend development Shipped 70+ products across FinTech, HealthTech, SaaS, and marketplaces Built systems used inside Google, MIT, and FedEx Developed industrial software for IPG/LightWeld powering SpaceX-grade manufacturing Led engineering for a fintech mobile app with 250k+ monthly active users YC startup I worked with raised $1.6M after MVP What I deliver: • Full-stack development: React, Next.js, TypeScript, Node.js • Mobile app development: React Native for iOS & Android • Backend development: Supabase, PostgreSQL, Firebase, custom APIs • API integrations: Stripe, HubSpot, Slack, REST, GraphQL • Automation: n8n workflows (onboarding, CRM sync, internal tools) • MVP development in 4–8 weeks • Codebase rescue, refactoring, performance improvements • Long-term weekly development & product support Toolbox: React ▪ Next.js ▪ React Native ▪ Node.js ▪ TypeScript ▪ Supabase ▪ PostgreSQL Firebase ▪ Redis ▪ Swift ▪ Kotlin ▪ Docker ▪ AWS ▪ Vercel ▪ CI/CD ▪ n8n Automations You get someone who can architect, build, integrate, and actually finish things — not just write fragments of code. If you need a reliable full-stack or mobile engineer who delivers clean engineering and fast execution — let’s talk.

Top Rated Full Stack & Mobile App Developer | 100% Job Success | $200K+ Earned | 7,600+ Hours ✅ $200K+ earned on Upwork ✅ 7,600+ hours worked ✅ 100% Job Success Score ✅ 8+ years of proven experience ✅ Available to work in your time zone ✅ Cross-platform expert: iOS, Android, React Native & Flutter ✅ End-to-End product development specialist I help startups and businesses turn ideas into scalable web and mobile applications. Over the last 8+ years, I have partnered with founders, startups, and growing businesses to build, launch, and scale products ranging from MVPs to enterprise-grade platforms. My focus is on delivering clean architecture, maintainable code, and products that create real business value. I specialise in: ✅ Cross-platform mobile applications using React Native and Flutter ✅ Full stack web applications using React, Node.js, and Laravel ✅ Native iOS (Swift) and Android (Kotlin) development ✅ API development and third-party integrations ✅ AWS cloud deployment and infrastructure management ✅ Feature development, maintenance, and product scaling ✅ End-to-end product ownership from idea to deployment What I can help you with: • SaaS Product Development • Startup MVP Development • React & React Native Applications • Mobile App Development (iOS & Android) • Backend APIs & Microservices • Payment Gateway Integration • CRM & Enterprise Software Development • Cloud Deployment & DevOps • Existing Application Enhancement and Maintenance Why clients work with me: ✔ Long-term collaboration mindset ✔ Clear and proactive communication ✔ Solution-oriented approach ✔ Accountability and ownership ✔ Focus on performance, scalability, and quality ✔ End-to-end product delivery ✔ Proven track record of long-term client relationships Technologies: Frontend: React.js, Next.js, React Native, Flutter Backend: Node.js, Express.js, PHP, Laravel Mobile: Swift, Kotlin Database: MySQL, MongoDB, PostgreSQL Cloud: AWS, Firebase Other: REST APIs, Git, CI/CD Whether you need to build a new product from scratch, scale an existing application, or extend your development team, I'd be happy to discuss how I can help. Let's build something great together.

𝟏𝟏+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | 𝟏𝟒𝐊+ 𝐔𝐩𝐰𝐨𝐫𝐤 𝐡𝐨𝐮𝐫𝐬 | 𝟖𝟎+ 𝐉𝐨𝐛𝐬 | 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 I am a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐔𝐧𝐢𝐭𝐲 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 with experience building 𝐀𝐑/𝐕𝐑 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐬, 𝐠𝐚𝐦𝐞𝐬, 𝐢𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐯𝐞 𝟑𝐃 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, 𝐚𝐧𝐝 𝐬𝐢𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧𝐬 for startups, studios, product teams, research projects, and growing businesses. I help clients build new Unity-based products, improve existing projects, continue incomplete systems, modernize older applications, and deliver real-time 3D solutions that are polished, scalable, and ready for production use. My work covers entertainment, immersive experiences, training tools, WebGL applications, and other technically demanding Unity projects that require both strong execution and practical problem solving. A key advantage in my work is the ability to use modern 𝐀𝐈-𝐚𝐬𝐬𝐢𝐬𝐭𝐞𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐰𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬 where they add real value and fit the client’s goals, workflow, and preferences. When suitable, I work with tools such as 𝐔𝐧𝐢𝐭𝐲 𝐀𝐈, 𝐂𝐥𝐚𝐮𝐝𝐞 𝐂𝐨𝐝𝐞, 𝐂𝐨𝐝𝐞𝐱, 𝐆𝐢𝐭𝐇𝐮𝐛 𝐂𝐨𝐩𝐢𝐥𝐨𝐭, 𝐚𝐧𝐝 𝐂𝐮𝐫𝐬𝐨𝐫 to support faster iteration, debugging, refactoring, and code quality. I can also work with platforms like 𝐈𝐧𝐰𝐨𝐫𝐥𝐝 𝐀𝐈, 𝐂𝐨𝐧𝐯𝐚𝐢, 𝐍𝐕𝐈𝐃𝐈𝐀 𝐀𝐂𝐄, 𝐌𝐞𝐬𝐡𝐲, 𝐒𝐜𝐞𝐧𝐚𝐫𝐢𝐨, 𝐃𝐞𝐞𝐩𝐌𝐨𝐭𝐢𝐨𝐧, 𝐚𝐧𝐝 𝐌𝐞𝐭𝐚𝐇𝐮𝐦𝐚𝐧 𝐀𝐧𝐢𝐦𝐚𝐭𝐨𝐫 for projects that need intelligent NPCs, procedural systems, voice-driven experiences, or AI-assisted content production. The goal is always the same: practical delivery, better workflows, and stronger products under clear human direction. 𝐖𝐡𝐚𝐭 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐰𝐢𝐭𝐡: 𝐀𝐑/𝐕𝐑 & 𝐗𝐑 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Meta Quest, Apple Vision Pro, AR Foundation, ARCore, Vuforia, immersive apps, mixed reality, headset, and mobile experiences 𝐆𝐚𝐦𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Game development from scratch, gameplay systems, feature development, multiplayer & networking, monetization, bug fixing, project continuation, cross-platform delivery, long-term production support 𝐈𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐯𝐞 𝟑𝐃, 𝐖𝐞𝐛𝐆𝐋 & 𝐒𝐢𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧𝐬 Real-time 3D applications, WebGL experiences, product visualization, research tools, utility apps, training systems, healthcare and educational simulations 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 & 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐏𝐫𝐨𝐛𝐥𝐞𝐦 𝐒𝐨𝐥𝐯𝐢𝐧𝐠 Performance optimization, memory optimization, ECS-based architecture, stabilization, debugging, refactoring, existing project improvement, production-ready technical support 𝐀𝐈-𝐄𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐔𝐧𝐢𝐭𝐲 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 AI NPCs, intelligent interactions, procedural systems, voice-enabled characters, computer vision, AI-assisted real-time features, Coplay, and MCP-based workflows/integrations 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐞𝐝 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐬 APIs, Firebase, Azure, cloud-connected Unity apps, data-driven features, backend integrations, production-ready support I work well independently and within teams, adapt to different workflows and time zones, and focus on shipping 𝐡𝐢𝐠𝐡-𝐪𝐮𝐚𝐥𝐢𝐭𝐲 𝐔𝐧𝐢𝐭𝐲 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐭𝐡𝐚𝐭 𝐚𝐫𝐞 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞, 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞, 𝐚𝐧𝐝 𝐛𝐮𝐢𝐥𝐭 𝐟𝐨𝐫 𝐫𝐞𝐚𝐥 𝐮𝐬𝐞.

Unity Game Developer | Unity 3D Developer | Mobile Game Developer | Roblox Developer | Multiplayer & AR/VR Specialist 10+ Years Experience | 80+ Published Games | 130M+ Downloads | Unity & C# Expert I am a professional Unity Game Developer and Mobile Game Developer with over 10 years of experience building high-quality games for Android, iOS, PC, WebGL, Roblox, and VR platforms. I specialize in Unity 2D/3D development, multiplayer networking, Roblox experiences, and immersive AR/VR applications. My focus is on creating engaging, scalable, and revenue-driven games that maximize player retention, downloads, and monetization. From concept and prototyping to launch and post-release support, I deliver polished, optimized, and store-ready products. What I Offer 🎮 Unity Game Development Experienced Unity developer with 80+ published titles developed using Unity and C#. Services include: • Gameplay Systems & Mechanics • AI Development • Physics-Based Interactions • UI/UX Implementation • Animation Systems • Level Design & Game Architecture Game genres: • Hyper Casual Games • Action & Adventure Games • Puzzle Games • Racing Games • RPG & Simulation Games • Strategy & Educational Games 📱 Mobile Game Development (Android & iOS) Published mobile game developer with over 130M downloads across Google Play and the App Store. Expertise includes: • Android Game Development • iOS Game Development • Mobile UI & Touch Controls • Performance Optimization • App Store Optimization (ASO) • Monetization Strategy & Implementation 🌐 Multiplayer Game Development Building real-time multiplayer games using industry-standard networking solutions: • Photon PUN • Photon Fusion • Mirror Networking • Netcode for GameObjects • Matchmaking Systems • Leaderboards & Player Progression 🥽 AR / VR Development Creating immersive AR and VR experiences using: • Unity AR Foundation • ARKit & ARCore • Meta Quest / Oculus • HTC Vive • Unity XR Toolkit 🧱 Roblox Game Development Professional Roblox development using Roblox Studio and Lua scripting, including gameplay systems, monetization, Game Passes, developer products, and custom mechanics. ⚡ Unity Optimization & Monetization Improving game performance, retention, and revenue through advanced optimization and monetization systems. Tools integrated: • Unity Ads • AdMob • ironSource • AppLovin • Firebase • Unity Analytics • In-App Purchases (IAP) Key Achievements ✔ 80+ Games Published Across Multiple Genres ✔ 130M+ Total Downloads Worldwide ✔ 20+ Multiplayer Games Developed ✔ Up to 40% Performance Improvements ✔ 4.5★+ Rated Mobile Games ✔ Cross-Platform Development Expertise Technical Skills Platforms: Unity 3D, Roblox Studio, Android, iOS, PC, WebGL, VR Programming: C#, Lua, Unity Scripting, OOP, Clean Architecture Game Development: 2D/3D Games, AI, Physics, Gameplay Systems, UI/UX Multiplayer: Photon, Mirror, Netcode, Dedicated Servers AR/VR: AR Foundation, ARKit, ARCore, Meta Quest, XR Toolkit Tools: Unity Editor, Visual Studio, Git, Blender, Photoshop, Firebase Let’s Build Your Game If you're looking for an experienced Unity Developer, Mobile Game Developer, Roblox Developer, Multiplayer Specialist, or AR/VR Developer, I can help transform your idea into a polished, scalable, and commercially successful game. 🚀

🚀 Senior Full Stack Developer | Cloud Architect | AI Integration Specialist 💼 14+ years of professional software development experience ⚙️ C#, .NET, ASP.NET Core, Node.js, PHP 🎨 React, Angular, Next.js, TypeScript 🤖 OpenAI API, Hugging Face, Pinecone, FAISS, n8n, Zapier ☁️ Azure, AWS, CI/CD, scalable architecture 🔌 Google APIs, QuickBooks, Twilio, Zoho CRM, SendGrid Hi, I’m Senior Full Stack Developer with 14+ years of experience building, modernizing, and scaling web applications. I specialize in ASP.NET Core, C#, React, Angular, Next.js, cloud architecture, API integrations, and practical AI solutions. I help businesses build reliable web applications and add AI-powered features such as AI chatbots, document search, RAG-based assistants, workflow automation, smart dashboards, and AI-powered SaaS functionality. WHAT I CAN HELP YOU WITH * Building scalable web applications from scratch * Modernizing legacy .NET, ASP.NET MVC, Web Forms, or PHP systems * Developing secure REST APIs and backend services * Creating responsive frontends with React, Angular, Next.js, and TypeScript * Integrating third-party APIs such as Google APIs, QuickBooks, Twilio, Zoho CRM, SendGrid, and Zapier * Adding AI features using OpenAI API, Hugging Face, Pinecone, FAISS, n8n, and Zapier * Designing databases using SQL Server, MySQL, PostgreSQL, MongoDB, Redis, and Elasticsearch * Deploying applications to Azure and AWS * Leading teams and reviewing architecture, code quality, and technical decisions CORE SKILLS Backend: C#, .NET, ASP.NET Core, ASP.NET MVC, Web API, Node.js, PHP, Python Frontend: Angular, React, Next.js, TypeScript, JavaScript, HTML5, CSS3 Databases: SQL Server, MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch Cloud & DevOps: Azure, AWS, GitHub Actions, GitLab CI/CD, Jenkins, Azure DevOps, AWS CodePipeline AI & Automation: OpenAI API, Hugging Face, Pinecone, FAISS, RAG, n8n, Zapier Architecture: Microservices, REST APIs, SOLID principles, clean architecture, performance optimization WHY WORK WITH ME? * I bring both hands-on development and architecture-level thinking * I can join an existing team or independently own a project * I write clean, maintainable, scalable code * I understand business goals, not just technical tasks * I communicate clearly and keep projects moving Whether you need a new application, legacy system upgrade, AI integration, API automation, cloud deployment, or long-term technical partner, I can help you build it properly. Let’s discuss your project and find the best technical approach.

🚀 Top-Rated Plus iOS Developer with 10+ Years of Mastery 📱 Published more than 15 big and 28 small Apps on App Store 🌐 Innovator in 3D Scanning and ARKit RoomPlan Api expert Expert in Objective-C, Swift, SwiftUI, and Dart | Guided by Apple's Design Principles | Adept in Low-Level C-based Libraries | Fluent in Cloud Messaging and Push Notifications | Git, Mercurial, SVN Guru | Ready to Elevate Your Project to the Next Level! 🚀 I can provide different levels of quality depending on the current requirement of the project relevant to the industry, starting from very rough proof of concepts, ending with the scalable and maintainable project with automation of delivery (CI/CD) and testing (unit/snapshot/UI tests). I have a 100 % project complete record with a good Job Success Score and high client recommendations while working as a freelancer. Thanks for reading. I would love to be considered for your future project! :) Thank you.

14 years and counting in programming/freelancing, here to deliver your project from an idea to a polished product. I can work in a team or deliver complete solution on my own. I offer paid consultation, which you can find below.

☑️ CTO of a Top-rated Ukrainian software development company Qualium Systems ☑️ 15+ years of expertise ☑️ 200+ projects released ☑️ 100% Job Success Score We help startups and businesses build scalable digital products - from SaaS platforms and mobile apps to AI-powered systems and interactive 3D configurators. Our expertise includes: • SaaS & custom web platforms • Mobile apps (iOS & Android) • AI integrations & automation • 3D configurators & product visualization • Cloud architecture & backend systems 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: React.js, Next.js, Node.js, TypeScript, React Native, Flutter, Three.js, OpenAI, TensorFlow, PostgreSQL, MongoDB, AWS, Docker, Kubernetes. 𝗪𝗵𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝘂𝘀: ✅ ISO/IEC 27001 certified processes ✅ Strong technical architecture expertise ✅ Transparent communication ✅ Full-cycle development team ✅ Long-term support & scaling Let’s discuss your project and build something outstanding together!

Top Rated Plus | Top 10 Machine Learning Agency on Upwork | $500K+ Earned | 8+ Years in AI & Software Engineering I'm an AI Engineer building production-grade AI agent and RAG systems, not simple prompt wrappers. With 8+ years in software engineering and AI development and $500K+ earned on Upwork, I hold Top Rated Plus status and our team is ranked among the Top 10 Machine Learning agencies on the platform. I work with companies that need an AI system to actually run in production, handle real user traffic, and stay accurate, not a demo that breaks on the first edge case. As an AI Engineer, my core work covers retrieval-augmented generation pipelines, agentic workflows with tool calling and structured outputs, prompt engineering, and LLM integration with OpenAI, Anthropic, and Gemini APIs. This is the kind of system clients need an AI Engineer for: not a chatbot that answers FAQs, but an agent that retrieves the right information, calls the right tools, and follows through on what the user actually needs, with hallucination reduction and evaluation built in from the start. As a Machine Learning Engineer and Data Scientist, I build systems for structured and time-series data: demand forecasting, anomaly detection, biomedical signal analysis, and structural health monitoring. My data scientist workflow covers Python, scikit-learn, pandas, NumPy, and SciPy alongside deep learning frameworks including TensorFlow, PyTorch, and Keras, with experiment tracking and evaluation metrics to ensure models perform consistently in production. When a project needs predictive or classification models alongside the AI agent itself, I own that layer too as a Machine Learning Engineer. As a Computer Vision Engineer and software engineer, I build object detection, multi-object tracking, pose estimation, and image segmentation systems using OpenCV, YOLO, and deep learning architectures. Where this intersects with the AI Engineer work is in multimodal systems and computer vision agents: I work with Vision Language Models (VLMs) to build AI pipelines that understand images and video, not just text. Most AI Engineers only work with text. I bring production computer vision and deep learning experience on top of the LLM layer, which matters for any product where the AI needs to see, not just read. On the engineering side, I work as a Python developer and software engineer building backend services with FastAPI, vector databases including Pinecone and pgvector, and LangChain or custom orchestration for multi-step agent logic. When a project needs full ownership of both the AI layer and the surrounding application, I work as a Full Stack AI Developer, handling backend APIs, database design, and frontend integration so the AI system ships as a complete product, not just a backend script. I work with a specialized team that includes a computer vision PhD, deep learning researchers, and mathematical optimization specialists. This lets me scope larger systems, split orchestration, retrieval, and evaluation work across the team, and deliver a full AI Engineer and Machine Learning Engineer engagement faster than a solo contributor could, with the software engineering discipline of clean APIs, logging, and testing baked in from day one. Clients typically work with me when they need: - an AI Engineer to build a RAG pipeline, AI agent, or chatbot that actually works in production - a Machine Learning Engineer or Data Scientist to build predictive models or structured data pipelines - a Computer Vision Engineer to add visual understanding or VLM-based reasoning to an AI product - a Software Engineer who understands LLM orchestration, tool calling, vector search, and backend architecture - a Python developer who can own the full stack from model training to deployed API If you need an AI Engineer and a software engineer with the full stack from prompt design to production deployment, let's talk. Main stack: Python, OpenAI API, Anthropic Claude, Gemini, LangChain, LangGraph, LlamaIndex, FastAPI, Pinecone, pgvector, TensorFlow, PyTorch, Keras, OpenCV, YOLO, Docker, PostgreSQL, JavaScript, Git.

I build fast, scalable Web & Mobile Apps and MVPs that actually launch. With 15+ years of experience, I help startups turn ideas into production-ready SaaS products clean code, solid architecture, and quick delivery. 💡 What I Do Best Build MVPs that go from idea → live in weeks Develop scalable SaaS platforms (multi-tenant, secure, performant) Turn messy/AI-generated code into clean, production-ready systems Integrate APIs (payments, messaging, auth, third-party tools) Design intuitive, conversion-focused UI/UX ⚙️ Tech Stack I Work With Frontend: Next.js, React, Angular, Tailwind Backend: Node.js, Python, .NET, Serverless Architecture Mobile: Cross-platform apps using React Native/Flutter Database: Supabase, PostgreSQL, MongoDB, Firebase, Integrations: Stripe, Twilio/Sinch, REST APIs, Graph APIs, Google Maps APIs Deployment: Vercel, Railway, AWS, modern CI/CD workflows AI Tools: Claude Code, Lovable, Cursor, Codex, Replit 🚀 Real Results I’ve Delivered Launched MVP platforms in under 3–4 weeks Built SaaS systems with real-time features and scalable architecture Fixed and optimized poorly structured codebases (including AI-generated projects) Delivered end-to-end solutions: design → development → deployment If you’re serious about building something solid, send me a message and let’s get it moving.