Hire the Best TypeScript Developers
in Australia

🚀 Senior MERN Stack Developer with 12+ years of experience helping startups build SaaS platforms and MVP applications. 🏅 Full Stack MERN Developer | MERN Stack Developer | Full Stack Developer 🏅 MERN Stack Expert | React Js, Next Js, Node Js, TypeScript, MongoDB | Tailwind 🥇 100+ high-impact projects successfully delivered| 🏆 Consistent 5-star feedback from client 📢 About Me I’m Sergio, a Full Stack MERN Developer with 12+ years of experience building scalable, high-performance web applications from scratch. I’ve delivered 150+ full stack applications across SaaS, eCommerce, fintech, healthcare, and enterprise platforms. I take ownership of the entire development processfrom planning and architecture to deployment and optimization. I specialize in: 👉React & Next.js for fast, responsive, SEO-friendly frontends 👉Node.js & Express for secure, high-performance APIs 👉MongoDB & PostgreSQL for scalable, well-structured databases Clients work with me because I focus on what actually matters: 👉Clean, maintainable code 👉Performance and scalability from day one 👉Clear communication and dependable delivery 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐈 𝐃𝐞𝐥𝐢𝐯𝐞𝐫 ✅ Full Stack MERN Development: MongoDB, Express.js, React.js, Node.js ✅ Next.js Applications: SSR, SSG, ISR, App Router, SEO & Core Web Vitals ✅ React.js Frontend Development: TypeScript, Tailwind CSS, Material UI ✅ Node.js & Express.js Backend: REST APIs, GraphQL, scalable architecture ✅ SaaS Platforms: multi-tenant architecture, RBAC, subscription billing ✅ Admin Dashboards & CRM/ERP Systems: real-time data, analytics, reporting ✅ AI Integration: OpenAI API, ChatGPT integration, AI-powered web apps ✅ eCommerce Development: Stripe, PayPal, Razorpay, cart & checkout flows ✅ Real-Time Apps: WebSockets, Socket, Firebase Realtime DB ✅ Cloud & DevOps: AWS, Docker, Vercel, CI/CD pipelines ✅ Authentication: JWT, OAuth2, NextAuth, Firebase Auth, RBAC 💡 Why Clients Choose Me as Full Stack MERN Developer ✔ Top Rated with 100% Job Success Score, a verified Upwork badge ✔ 12+ years of real Full Stack MERN experience across 150+ delivered applications ✔ Full Stack ownership, I handle React.js frontend, Node.js backend, and deployment ✔ Performance-first, SSR, ISR, code splitting, caching built in from day one ✔ AI-ready development, I add OpenAI & ChatGPT integrations that work in production ✔ Clear communication, realistic timelines, on-time delivery ✔ I think like a product owner, not just a Full Stack MERN developer 🎯 𝐂𝐨𝐫𝐞 𝐬𝐤𝐢𝐥𝐥𝐬 𝐚𝐧𝐝 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: • Frontend: React.js | Next.js | TypeScript | Tailwind CSS | Material UI | Redux Toolkit | Zustand • Backend: Node.js | Express.js | NestJS | REST APIs | GraphQL • Databases: MongoDB | PostgreSQL | MySQL | Firebase | Supabase • State Management: Redux, Zustand, RTK Query • AI & LLM: OpenAI API | ChatGPT Integration | AI-Powered Features • UI & Styling: Tailwind CSS, modern responsive design • Performance Optimization: Responsive design, client-side performance optimization • SEO Optimization: Technical and on-page • Cross-browser / Cross-platform: Compatibility testing • Tooling: Webpack, Vite, Git, NPM, PNPM, Docker, CI/CD (GitHub Actions, GitLab CI) •Integrations: Twilio | SendGrid | Socket | WebSockets • Cloud Platforms: AWS, Azure, Firebase Hosting, Vercel, Netlify, DigitalOcean, Heroku 🏆 What I Have Built for Clients ✔ Full Stack MERN SaaS platforms with multi-tenant architecture & Stripe billing ✔ React.js & Next.js admin dashboards with role-based access & real-time analytics ✔ AI-powered web apps with OpenAI API & ChatGPT integration ✔ Healthcare platforms with booking systems, patient portals & admin panels ✔ Next.js eCommerce storefronts with Stripe Connect & automated billing flows ✔ SEO-optimized Next.js websites | 40%+ organic traffic increase post-launch ✔ REST APIs integrated with React.js frontends & mobile clients ✔ Legacy codebase refactors | 50%+ improvement in load times & performance 📩 Ready to Build Your Full Stack MERN Application? If you need a Top Rated Full Stack MERN Developer who delivers clean, fast, and production-ready React.js & Next.js applications, send me a message today. 🚀 I respond within a few hours. Let's build something great together 🔍 Full Stack MERN Keywords & Skills Full Stack Developer | Full Stack MERN Developer | MERN Stack Developer | MERN Developer | React.js Developer | React Developer | Next.js Developer | Node.js Developer | Node Developer | Express.js Developer | MongoDB Developer | TypeScript Developer | JavaScript Developer | Full Stack Web Developer | Full Stack React Developer | Full Stack Node Developer | MERN Stack | MERN | React Next Developer | Next.js SSR | Next.js SSG | Next.js ISR | Next.js App Router | SaaS Developer | SaaS Application Developer | SaaS Platform Developer | Admin Dashboard Developer | CRM Developer | ERP Developer | AI Integration Developer | OpenAI Developer | ChatGPT Integration

I’m Hiro, a Melbourne-based Senior Full-Stack & WordPress Developer with over 20 years of experience building scalable web applications, business systems, and high-performance websites. I help businesses design, develop, and optimise custom digital solutions - from complex web applications and APIs to WordPress platforms and eCommerce systems. Full-Stack Development Expertise: I architect and build secure, scalable applications using modern technologies, including: Backend: PHP, Laravel, Node., Express Frontend: React, Next, Vue., Nuxt., Angular Databases: MySQL, MS SQL Server, MongoDB APIs & Integrations: REST APIs, payment gateways, Mailchimp, third-party services DevOps & Hosting: AWS, VPS, CI/CD pipelines, GitHub Actions, SSL, production deployments I specialise in: Custom CRM & workflow systems Business process automation Secure API development Performance optimisation Scalable system architecture WordPress Development Expertise: Beyond applications, I deliver professional WordPress solutions, including: Custom theme & plugin development WooCommerce stores API integrations Performance optimisation & security hardening Elementor / custom block development Hosting, migrations, and maintenance I don’t just build websites - I build systems that support real business operations. How I Work: Clear communication Clean, maintainable code Scalable architecture Business-focused solutions Reliable delivery I take time to understand project goals and deliver solutions that are technically strong and aligned with long-term business growth.

Full-Stack Web Developer I am a full-stack web developer focused on building modern, scalable web applications and websites that combine exceptional user experiences with reliable backend systems and maintainable architecture. I develop fast, secure, and performance-driven digital products using HTML, CSS, JavaScript, React, Next.js, Astro, Supabase, PHP, and Tailwind CSS. I build everything from marketing websites and CMS-driven business sites through to custom web applications, client portals, dashboards, and SaaS platforms. I work across the entire development lifecycle—from UI/UX design and front-end implementation through to backend architecture, database design, authentication, API integrations, deployment, and ongoing optimisation. I use AI-assisted development as a core part of my workflow, combining tools like Claude Code and Codex with engineering best practices to accelerate delivery while maintaining clean, scalable, production-ready code. Core Technologies: Frontend * HTML5 * CSS3 * JavaScript / TypeScript * React * Next.js * Astro * Tailwind CSS * Responsive and accessible UI development Backend & Infrastructure * Supabase (Authentication, PostgreSQL, Storage, Edge Functions, Realtime) * PHP * REST APIs and third-party integrations * Database design and management * Authentication and user management systems CMS & Content Platforms * WordPress * Sanity * Headless CMS architectures Deployment & DevOps * Vercel * Netlify * Git & GitHub * Environment management and production deployments * Domain configuration and hosting workflows Design & Product Development * Figma * UI/UX design * Interactive prototyping * Design-to-development workflows Professional Approach I've successfully delivered production websites and full-stack web applications for businesses and startups, focusing on scalable, maintainable solutions that solve real business problems. My development process is product-focused: understanding business objectives, designing intuitive user experiences, building reliable solutions, integrating real-world systems, deploying confidently, and continuously improving based on user feedback and performance. Areas of Expertise * Full-stack web application development * Business websites and custom client portals * React, Next.js, Astro, and PHP development * Supabase architecture and integrations * API development and third-party integrations * WordPress and headless CMS solutions * UI/UX implementation and prototyping * Performance optimisation, SEO, and accessibility * Deployment with Vercel, Netlify, and custom domains * Website maintenance, support, and ongoing feature development Whether you need a high-performing marketing website, a custom business platform, or a scalable SaaS application, I deliver reliable solutions with clear communication, practical problem-solving, and a focus on long-term success.

I'm a Ruby on Rails developer and full stack developer focused on SaaS and FinTech products. Day to day that's Ruby on Rails and React.js (Next.js, TypeScript) on PostgreSQL, deployed on AWS with Docker when the app needs it. 6+ years building production web applications — Top Rated Plus, 100% Job Success, 6,100+ Upwork hours, 85+ jobs. Most contracts run 1–4 years on one codebase. Available 30+ hours a week. Two years at SmartZip on their Rails + React lead-gen SaaS. Since then: B2B SaaS features, Stripe billing, GraphQL and REST APIs, Elasticsearch for search, Heroku-to-AWS migrations, Rails version upgrades. Frontend is React and Next.js; backend is Rails, Sidekiq, RSpec, and PostgreSQL done properly. I've also been adding AI features to live products — LLM API integration, chat interfaces and workflow automation. A long-term client, Olivier: "30+ eLearning apps, nearly 4 million plays — proactive, doesn't need hand-holding." Hiring a Ruby on Rails developer for ongoing SaaS work, full stack Rails + React, FinTech/Stripe, or a legacy app that needs a Rails upgrade or cloud migration? Send your repo or roadmap, I'll reply with an honest take on fit.

Your website’s front-end is the first thing your customers see. Let’s make sure it’s fast, flawless, and leaves a lasting impression. 🚀 I am a Front-End Developer specializing in crafting modern, high-performance user interfaces using React, Next.js, and Tailwind CSS. I don't just write code; I focus on building scalable web applications that provide a smooth, engaging experience across all devices. Whether you are starting a project from scratch or need to bring a complex Figma design to life, I am here to bridge the gap between your vision and a fully functional web experience. 💼 What I bring to your project: -Pixel-Perfect Conversion: Turning Figma, Adobe XD, or wireframes into clean, interactive React/Next.js components. -Modern Architecture: Building performant, SEO-friendly applications utilizing the latest Next.js features (including App Router). -Responsive & Rapid Styling: Crafting beautiful, mobile-first designs quickly and efficiently with Tailwind CSS. -Clean & Maintainable Code: Writing structured, reusable components that make future updates a breeze. 🛠️ My Tech Stack: JavaScript (ES6+), TypeScript, React.js, Next.js, Tailwind CSS, Bootstrap, HTML5/CSS3, and Git. ✅ Why work with me? I believe that communication is just as important as coding. When you work with me, you can expect transparent daily updates, strict attention to detail, and a commitment to meeting your deadlines. I treat your project with the same care as if it were my own. Let’s turn your ideas into a live, professional web experience. Send me a message to discuss your project—I’m ready to help you build something great! 🤝

When a client comes to me, they're not just looking for someone who can write code, They want a developer who understands what they're building and why. I work across the full stack, from architecting MongoDB schemas and Node.js APIs to building fast, production-ready React and Next.js frontends. On the cloud side, I handle AWS deployments, serverless functions, and infrastructure that scales without surprises. Most of my projects fall into one of a few patterns: SaaS platforms that need solid multi-tenant architecture, web apps where performance and SEO both matter (Next.js is my default choice here), backend systems where REST or GraphQL APIs connect to third-party services, and Python-based automation or data pipelines that save clients hours of manual work every week. My stack in practice: React with TypeScript, Next.js 14/15 App Router, Node.js with Express or NestJS, MongoDB with Mongoose, Python for automation and scripting, AWS (EC2, S3, Lambda, CloudFront, RDS), and deployment via Vercel, Docker, or CI/CD pipelines on GitHub Actions. I also integrate AI tools like OpenAI API, LangChain, vector databases into production applications when the project calls for it. What I've built for past clients includes a multi-vendor marketplace with real-time inventory sync, a Next.js SaaS dashboard with Stripe billing and role-based access, REST APIs handling over 50,000 requests per day, and MongoDB aggregation pipelines replacing what used to be hours of manual reporting. I communicate clearly throughout a project. You'll get updates without having to chase them, honest pushback when something isn't the right approach, and clean, documented code that your team can maintain after the project ends. I work well with both technical founders who want to go deep on architecture, and non-technical clients who need plain-language explanations of what's happening. If your project involves React, Next.js, Node, MongoDB, Python, or AWS or some combination of all of them I'd like to hear about it.