If you're building a casino platform, betting site, or iGaming product — you've found the right developer. I've built and shipped three live casino platforms from the ground up. These aren't template sites or white labels. They are fully custom iGaming platforms with real-time game integrations, seamless wallet APIs, payment processing, and custom mobile UIs — built by me, live, and used by real players today. With 8 years of full-stack development experience, here's what I bring to iGaming and beyond: ♠ iGaming & Casino Development Custom casino platforms, sports betting sites, poker games, and slot game development. Seamless and Single Wallet API integration, provably fair logic, real-time game engines, MD5 signature hashing, and payment gateway integration across crypto, fiat, and local payment methods. I've worked with major iGaming API providers and delivered production platforms that handle real money transactions. ♠ Full-Stack Web Development React, Next.js, Node.js, Python/FastAPI. Clean architecture, scalable backends, and polished frontends built to convert. ♠ Mobile Apps React Native and Expo for cross-platform iOS and Android. From MVP to App Store deployment. Currently launching a dating app with real users. ♠ Real-Time Systems Socket io, Firebase, WebSockets, and FCM push notifications. I've built platforms handling thousands of concurrent users without breaking a sweat. ♠ Backend & APIs REST API design, PostgreSQL, MongoDB, Firebase, Supabase, third-party integrations, and cloud deployment on AWS, Azure, and Vercel. ♠ AI & LLM Integrations OpenAI GPT-4o, Claude, LangChain, RAG pipelines, Pinecone, FAISS, and Hugging Face. Production AI features, not just prototypes. ♠ Payments Stripe, PayPal, Flutterwave, Paystack, bKash, and crypto wallets. I understand money movement in both regulated and unregulated markets. My live work includes three fully custom casino platforms, a dating app, a US hiring marketplace, and an eCommerce platform — all shipped and used by real people. You can see all of them in my portfolio below. I work full-time, communicate clearly, and deliver on time. I write code I'm proud to hand over and treat your project like it matters — because it does. If you're building something in iGaming or need a full-stack developer who has actually shipped real products, let's talk.

Skilled Website Developer ⭐ 5-Star Reviews & Happy Clients on Every Project 100% Job Success Rate Ready to Build a Profitable Online Presence for Your Business I am a Full Stack Developer skilled in WordPress, React.js, Next.js, Node.js, HTML, CSS, Tailwind CSS, and SEO-optimized website development. I Have Experience Developing: • Full Stack Web Applications using React.js, Node.js, Express.js, MongoDB, PostgreSQL, and SQL • Responsive Websites using HTML5, CSS3, JavaScript, Tailwind CSS, and Bootstrap • Modern Frontend Interfaces with React, Next.js, and API Integrations • Cross-Platform Mobile Applications using React Native • Custom WordPress Websites, Landing Pages, and Business Websites • SEO-Friendly Websites Optimized for Speed, Performance, and Search Rankings • Dashboards, Admin Panels, Authentication Systems, and REST APIs • E-commerce Websites and Scalable Business Platforms I focus on writing clean, maintainable, and scalable code while delivering an excellent user experience across desktop, tablet, and mobile devices. My Core Skills: ✔ Full Stack Development ✔ React.js & Next.js Development ✔ Node.js & Express.js Backend Development ✔ MERN Stack Development ✔ MongoDB, PostgreSQL & SQL Databases ✔ React Native Mobile App Development ✔ WordPress Development & Customization ✔ REST API & Third-Party API Integration ✔ Tailwind CSS & Responsive Design ✔ SEO Optimization & Website Performance ✔ UI/UX-Focused Development ✔ Authentication & Dashboard Systems I can manage your project from start to finish—from planning and UI implementation to backend development, deployment, optimization, and ongoing support. If you're looking for a reliable Full Stack Developer who can build modern, responsive, and SEO-optimized applications for your business, feel free to invite me to your project.

Frontend engineer with 3+ years building production-grade Vue and Nuxt applications — fintech dashboards, backoffice systems, and component libraries that real teams maintain and scale. Most recently at Payrexx (Swiss payment platform): led Vue component library architecture, shipped a full Vue 2 → Vue 3 migration, and built dashboard UI handling complex financial data flows. I have a recommendation letter from the Software Architect and Head of Technology. Where I do my best work: · SaaS dashboards and admin panels with complex state · GraphQL-driven interfaces and REST API integration · Vue 2 → Vue 3 / Nuxt 3 migrations · Component libraries with Storybook · Dynamic forms, validation flows, data-heavy UIs Stack: Vue 2 / Vue 3 / Nuxt 3 · TypeScript · Pinia / Vuex · TailwindCSS · GraphQL · Vitest · Storybook I write clean, maintainable code, communicate clearly in async teams, and take ownership of what I ship — not just the feature, but the codebase six months later.

🚀 Built Your SaaS with AI Tools but Now Need It Production-Ready? If you used Lovable, Bolt , Base44 or any other full stack web app want to launch your MVP — but now the code is messy, slow, or hard to scale — I help turn it into a clean, secure, scalable SaaS application. I’m a Top Rated Full-Stack Developer (100% Job Success, $60K+ earned) with 6+ years of experience building and scaling production-ready web apps using React, Next.js, and Supabase. I don’t just write code — I fix architecture, improve performance, and prepare your product for real users. 🎯 What I Specialize In ✅ AI-generated SaaS or MVP cleanup & refactoring ✅ AI-powered Web Applications like ( Lovable, Bolt, Base44 etc ) ✅ Subscription & Stripe Integrations ✅ Dashboard & Admin Panels ✅ Performance Optimization (up to 60% faster load times) ✅ Long-term product scaling 🔐 Supabase Database Specialization ✅ Supabase Edge Functions (Serverless APIs & Logic) ✅ RLS (Row-Level Security) Policy Setup ✅ Secure Authentication & Authorization ✅ Role-Based Access Control (RBAC) ✅ Email Configuration (SMTP, Magic Links, OAuth) ✅ Supabase Database Design & Optimization ✅ Production Deployment & Scaling ✅ Payment gateway integrations ( Stripe, Paypal , Any local payment system ) Language: Javascript, Typescript, Python 🛠 Core Tech Stack (Focused & Clean) Frontend: React.js, Next.js , TypeScript, Tailwind CSS, Shad CN, Redux Backend: Node.js, Express.js, Fast API, Supabase Database: PostgreSQL, MongoDB, MySQL Infrastructure: Hostinger, Vercel, AWS, Docker 💼 Real Business Results ✔ Built healthcare appointment platform handling thousands of users ✔ Developed mental health SaaS product with subscription model ✔ Design and develop web and mobile app for event management platform ✔ Reduced React app load time by 60% ✔ Built dashboards with real-time data & role-based authentication ✔ Delivered 150+ successful Upwork projects 🧠 Why Clients Choose Me • Clear communication (0-4 hour response time) • Business-focused mindset (not just technical delivery) • Clean, scalable architecture • Reliable long-term support • No over-promising — just solid execution 👨‍💻 Who I Work Best With • SaaS founders who started with AI tools • Startups preparing for real user growth • Founders needing technical restructuring • Agencies needing senior-level React support 📩 Let’s Build Something That Scales Send me a message with your idea, and I’ll give you a clear technical roadmap before we start. — Salem

Need a reliable developer to fix issues, improve performance, integrate AI features, or build scalable web applications? I help startups and businesses maintain, optimize, and scale their applications using Laravel, React.js, Next.js, and modern AI integrations. Over the last 4+ years, I’ve worked on: E-commerce platforms Admin dashboards CRM systems REST API integrations Payment gateway integrations AI-powered features Legacy Laravel application upgrades What I can help you with: ✅ Laravel Bug Fixing & Maintenance ✅ AI Integration (OpenAI, ChatGPT APIs, AI Automation) ✅ API Development & Third-Party Integrations ✅ React.js / Next.js Frontend Development ✅ Database & Performance Optimization ✅ Code Refactoring & Cleanup ✅ Payment Gateway Integration (Stripe, PayPal) ✅ Admin Panels & Dashboard Systems ✅ Existing Project Support & Feature Development Tech Stack: Laravel, PHP, MySQL, React.js, Next.js, JavaScript, Tailwind CSS, Bootstrap, REST APIs, OpenAI API, Git Why clients work with me: Clear communication Fast response Clean & maintainable code On-time delivery Long-term support I’m comfortable working with existing/legacy Laravel projects and quickly understanding large codebases. Available for long-term maintenance and ongoing development. If you need a developer who can quickly understand your project and deliver reliable solutions, feel free to invite me to your job.

Most teams know they need AI in their product. Few know how to ship it in production without it breaking, costing too much, or hallucinating into liability. That's where I come in. I'm a full-stack engineer who builds production-grade AI features — LLM integrations, autonomous agents, RAG systems, and voice-first interfaces — on top of modern stacks (React, React Native, Supabase, Node.js). Recent production work: → SmartSale — Built a B2B SaaS for retail shops with an agentic AI debt collection system and natural-language Telegram interface. Live with paying customers across multiple cities. → Voice-first finance tracker — Telegram Mini App using Whisper (speech-to-text) + Gemini (parsing) for hands-free expense logging. → Multi-agent inventory & pricing system — Autonomous agents handling inventory queries, pricing decisions, and customer interactions over Telegram. What I'm best at: LLM integrations that actually work in production (OpenAI, Anthropic Claude, Gemini) Agentic systems with proper eval, observability, and fallback handling Telegram bots and Mini Apps with AI built in Supabase architecture (Postgres + RLS + Edge Functions + Auth) React, React Native (Expo), TypeScript end-to-end How I work: I take real ownership. I ship fast but I think about edge cases, costs, and what happens at scale. I communicate clearly in English (verified), and I work across Asian, European, and US time zones from Uzbekistan. If you're trying to add AI to your product and want someone who's already shipped this stuff to real users — let's talk.

Full-Stack Developer | Backend Developer | SaaS Developer | MERN Pro Hi, I am Gaurav Kumar, a Full-Stack Developer specializing in Backend Development, SaaS Applications, and MERN Stack solutions. I help startups, entrepreneurs, agencies, and established businesses build secure, scalable, and high-performing web applications that drive growth and deliver exceptional user experiences. With years of experience in modern web development, I have successfully developed SaaS platforms, CRM systems, marketplaces, business automation tools, dashboards, enterprise applications, and custom web solutions. My expertise covers the entire development lifecycle, from product planning and architecture design to deployment, optimization, and ongoing support. ----------- My Expertise -------------- Full-Stack Development - Custom Web Application Development - Enterprise Software Development - Scalable Application Architecture - Frontend & Backend Development - API Development & Integration - Cloud-Based Applications Backend Development - Node.js Development - Express.js Development - RESTful API Development - Database Architecture & Optimization - Authentication & Authorization Systems - Payment Gateway Integration - Server Performance Optimization MERN Stack Development - MongoDB - Express.js - React.js - Node.js - Redux - Next.js - TypeScript SaaS Development - SaaS MVP Development - Multi-Tenant SaaS Platforms - Subscription-Based Systems - User Management & Permissions - Analytics Dashboards - Workflow Automation Solutions - Scalable SaaS Architecture Technologies I Work With - JavaScript (ES6+) - TypeScript - React.js - Next.js - Node.js - Express.js - MongoDB - PostgreSQL - MySQL - Redis - Docker - AWS - Firebase - GraphQL - REST APIs - Git & GitHub What I Can Build ✔ SaaS Platforms ✔ CRM & ERP Systems ✔ Marketplace Applications ✔ Business Automation Tools ✔ Admin Dashboards ✔ Startup MVPs ✔ Booking & Scheduling Platforms ✔ API-Driven Applications ✔ Real-Time Applications ✔ Enterprise Portals ✔ AI-Powered Web Applications ✔ Custom Software Solutions Why Clients Choose Me I believe successful software is more than just clean code. It should be secure, scalable, maintainable, and aligned with business goals. When working on a project, I focus on: - Scalable Architecture - Clean & Maintainable Code - High Performance & Security - Modern Development Practices - Business-Oriented Solutions - Long-Term Scalability - Exceptional User Experience Whether you need a complete SaaS product, a custom web application, a robust backend system, API development, or a full MERN Stack solution, I can help transform your idea into a reliable and scalable digital product. Let's discuss your project and build software that creates real business value and long-term success. Core Skills: Full-Stack Development, Backend Development, SaaS Development, MERN Stack Development, React.js, Next.js, Node.js, Express.js, MongoDB, PostgreSQL, API Development, JavaScript, TypeScript, Cloud Solutions, Startup MVP Development, Enterprise Application Development. 🚀

🏅 Top Rated on Upwork, Trusted by startups, SaaS brands, and Fortune 50+ companies for high-performance MERN Stack Development Servcies 🏅 7+ Years of Professional MERN Stack Development Experience in React Next – Focused on creating business-driven digital platforms 🏆 Expert MERN Stack Developer – Delivering modern, secure, and scalable Full Stack React Next applications 🏅 MERN Stack & React Next Specialist – Architecting robust solutions using MongoDB, Express.js, React, and Next.js 🏅 Advanced React Next Developer – SSR, SSG, ISR, and API Routes for lightning-fast, SEO-optimized React Next applications 🏅 Delivered 70+ React Next Full Stack Applications with pixel-perfect UI and clean backend logic 🏅 Strong expertise in React Next APIs, Microservices, and Full Stack Integrations 🏅 Cloud Deployments & CI/CD Pipelines for seamless React Next Full Stack Systems (AWS, Vercel, Firebase, GCP) 🏅 Secure Authentication in React Next Full Stack Apps (JWT, OAuth, Firebase Auth) 🏅 Trusted Partner for SaaS, eCommerce, LMS & Enterprise Full Stack React Next Solutions 📢 About Me I’m an Expert Full Stack Developer Expert in React Next helping startups, SaaS companies, and fast-growing brands design and build reliable, high-performance web platforms. My expertise lies in Full Stack React Next Development — crafting interactive frontends in React & Next.js, powered by Node.js, Express, and MongoDB backends. Every Full Stack React Next Project, I build focuses on: • Lightning-fast performance with Next.js SSR, ISR, and code splitting • Seamless UX through React components and modern UI frameworks • Secure, scalable APIs with Express.js and REST/GraphQL • Cloud-native architecture designed for growth 🛠️ Full Stack React Next Services I Offer ✔️ Modern Full Stack React Next Development – Next.js, React, Node, MongoDB, Express ✔️ Custom UI Development – Tailwind CSS, Material UI, Framer Motion, Styled Components ✔️ API Development & Integration – RESTful APIs, GraphQL APIs for React Next Apps ✔️ Secure Authentication Systems – JWT, OAuth2, Firebase Auth, NextAuth ✔️ SaaS Platforms & Admin Dashboards – Scalable React Next Full Stack Systems ✔️ eCommerce Applications – React Next storefronts with Stripe, PayPal, Razorpay ✔️ Performance Optimization – SSR, SSG, ISR, caching, code splitting ✔️ CI/CD & DevOps – Docker, GitHub Actions, AWS, Firebase, Vercel ✔️ Database Architecture – MongoDB, PostgreSQL, Prisma ORM ✔️ Real-Time Features – WebSockets, SocketIO, Firebase Realtime DB 💼 Industries I Serve 🚕 Ride Booking & Transport Systems (React Next Full Stack) 🍔 Food Delivery & Restaurant Platforms (React Next, Node, MongoDB) 📅 Event Scheduling & Ticketing Solutions (Next.js SSR + Express APIs) 🧾 SaaS, CRM & ERP Systems (React Next Full Stack Architecture) 🛒 eCommerce & Marketplace Platforms (Next.js + MongoDB) 📚 LMS & eLearning Systems (React Next + Firebase) 📊 BI & Analytics Dashboards (Next.js + Mongo Aggregation) 📱 PWAs & Cross-Platform Full Stack React Next Applications 💡 Why Hire Me as Your Full Stack React Next Developer? ✔️ 6+ years of real-world Full Stack React Next Development ✔️ 70+ modern React Next Full Stack Applications delivered ✔️ Expertise in Next.js SSR, ISR, SSG, and API Route Optimization ✔️ Clean, modular, and maintainable React Next Full Stack Codebase ✔️ Scalable backend architecture using Node, Express, MongoDB ✔️ Strong focus on SEO, performance & accessibility for React Next Apps ✔️ Transparent communication & guaranteed on-time delivery 🧠 Tech Stack & Tools Frontend: React, Next.js, TypeScript, Tailwind, MUI, Redux, Zustand Backend: Node.js, Express.js, REST/GraphQL APIs Database: MongoDB, PostgreSQL, Firebase Authentication: JWT, OAuth2, NextAuth, Firebase Auth Cloud/DevOps: Docker, AWS, Vercel, Firebase Hosting, GitHub Actions Integrations: Stripe, PayPal, Razorpay, Twilio, SendGrid 🔍 Top React Next Full Stack Keywords & Skills Full Stack React Next Developer, React Next Full Stack Development, React Next Developer, Full Stack Development, MERN Stack, Next.js SSR, Next.js ISR, React Components, React Hooks, TypeScript, Node.js, Express.js, MongoDB, Firebase, Prisma, Tailwind, Material UI, RESTful APIs, GraphQL, CI/CD, Vercel, AWS, Docker, Stripe Integration, Payment Gateways, Secure Auth, SEO Next.js, Scalable Architecture, API Integration, Admin Dashboards, SaaS Platforms, Real-Time Apps, Cloud Deployment, Performance Optimization, Clean Code, Modular React Next Architecture, Reusable Components, Enterprise Web Apps, Full Stack Web Development. 📞 Let’s Build Your React Next Full Stack Project Ready to take your product from concept to scalable reality? Hire an Expert Full Stack React Next Developer who can design, develop, and deploy production-grade full stack solutions. 🚀 Click Invite and let’s create your next modern, secure, and high-performing React Next Full Stack Application today.

Are you looking for a Frontend Engineer who builds scalable, high-performance products — not just interfaces? I’m a Front-End Developer specializing in React.js and Next.js, with hands-on experience building production-grade platforms used by 1K–200K+ users. I focus on clean architecture, performance, scalability, and delivering reliable products that are built for long-term growth. 💡 Why Work With Me? • Business-Oriented Development I focus on building solutions that support real business goals — not just shipping features. • Clean & Scalable Architecture I write maintainable, production-ready code that is easy to scale, optimize, and extend over time. • Strong Communication & Reliability Clear communication, ownership, and consistent delivery are a core part of how I work. • Modern, High-End Frontends I care deeply about UI quality, responsiveness, and creating polished user experiences that feel modern and trustworthy. 🚀 What I Bring to Your Project • Performance & SEO Optimization Experience with code splitting, lazy loading, image optimization, and SEO-focused Next.js applications. • Scalable Frontend Systems Building maintainable applications using TypeScript, Zustand, TanStack Query, and reusable component architecture. • Complex Integrations Real-time systems, WebSockets, payment gateways, authentication flows, dashboards, and third-party integrations. 🛠 Technical Stack Frontend: React.js, Next.js, TypeScript, JavaScript (ES6+) UI & Styling: Tailwind CSS, SCSS, MUI, Ant Design, Framer Motion State & Data: TanStack Query, Zustand, Redux Toolkit, REST APIs, WebSockets Tools & Integrations: Stripe, Pusher, Agora SDK, Git/GitHub, CI/CD, Figma 📈 Recent Impact • Built and optimized large-scale frontend systems serving 130K+ users • Improved SEO and performance scores across production applications • Developed reusable UI systems that accelerated development workflows • Implemented real-time features with fast, responsive user experiences If you're looking for a developer who combines technical quality, scalability, and product thinking — let's connect and discuss your project.

No agencies. No outsourcing. You communicate and work directly with me. If you are tired of agency overhead, ghosting, and generic AI-generated code that breaks on mobile, let’s talk. I am a Senior Frontend Developer with 8+ years of experience and 4,200+ hours on Upwork, specializing in turning complex designs into high-performance, production-ready frontend architecture. What Makes Me Different Pixel-Perfect Figma-to-Code: I don't just "replicate" designs; I build them with absolute precision, flawless mobile adaptation, and smooth micro-interactions (GSAP, Framer Motion). Direct & Fast Communication: I work individually on my own account. I am always available for video calls, respond super-fast, and keep projects moving without delays. Seamless Team Integration: I easily jump into existing codebases, collaborating closely with backend engineers and product teams from early MVPs to mature SaaS platforms. NDA-ready. 📍Core Stack TypeScript · JavaScript (ES6+) React · Next.js (App Router / Pages Router) Full-stack Next.js capabilities (Server Components, Server Actions, API Routes) Debugging & Performance Optimization: Browser DevTools (Network, Profiler, Memory) 📍Architecture Component-based architecture Custom hooks Feature-based structure 📍State & Data React Query / TanStack Query Redux, Zustand, Context API GraphQL integrations 📍UI Engineering Custom UI Kits & Design System implementationTailwind CSS · Styled Components · CSS/SCSS ModulesSemantic HTML5 · CSS Grid / Flexbox · Modern LayoutsComponent lifecycle styling & Dynamic UI statesResponsive & Adaptive engineering (Flawless Mobile UX) 📍Performance SSR / SSG / CSR Code splitting, lazy loading Performance optimization targeting Core Web Vitals to improve SEO rankings and conversion rates 📍Testing & Workflow Git / GitHub CI/CD basics Jest, React Testing Library 📍Animations & Interactions GSAP, ScrollTrigger, Framer Motion Micro-interactions Page transitions Scroll-based storytelling Interactive UI experiences AI as a productivity accelerator I leverage AI-assisted development tools (such as Cursor IDE, Claude Opus, ChatGPT, Antigravity CLI, Gemini) to automate repetitive tasks and accelerate setup and refactoring, while retaining full control over technical decisions, architecture, and final code quality. ⚡ Faster delivery without sacrificing architecture or quality. What I Build • Business & marketing websites • SEO-engineered websites with pristine semantic markup and instant indexability • SaaS products & customer portals • AI-driven dashboards & LLM streaming interfaces • FinTech applications & dashboards • Real estate & insurance platforms • Booking & scheduling systems • Custom web applications • White-label solutions I believe successful projects need more than code — they need care, consistency, and a developer who thinks ahead. That’s why I focus on long-term collaboration: maintaining, improving, and scaling your website with bug-free code, flawless mobile adaptation, and smooth UX. If you’re looking for someone to stand by your side and support your project’s growth — I’m that person. ⭐⭐⭐⭐⭐ "Iryna made a great job transforming design from Figma to the real landing page. We definitely will work with her again." ⭐⭐⭐⭐⭐ "Great communication. Was proactive about asking questions. By being interactive, asking questions, and making suggestions, it made the project better than if they just literally followed the instructions. Worked very quickly and finished ahead of schedule." ⭐⭐⭐⭐⭐ "Iryna was able to handle all of our change requests and keep projects moving forward. She worked great with our team. I wish she was able to be a full-time team member." ⚡ Direct, reliable, and always available for video calls & fast communication — let’s build something that lasts! Questions or project ideas? Let’s chat! 💬