Hire the Best React.js Developers
in Portugal
Lisbon, Portugal
๐ Is your MVP taking months instead of weeks? ๐ก Tired of developers who donโt understand your business and just write code? I help startup founders launch production-ready MVPs in ๐ฎโ๐ฏ ๐๐ฒ๐ฒ๐ธ๐, using a clear, ๐ฏ๐๐๐ถ๐ป๐ฒ๐๐-๐ผ๐ฟ๐ถ๐ฒ๐ป๐๐ฒ๐ฑ development approach. As an Upwork Expert-Vetted React Front End Developer with a Masterโs in Computer Science and 7+ years of experience building scalable SaaS platforms, dashboards, and custom APIs, I translate complex tech into clear product decisions that drive results. Iโve worked with startups from idea stage to Series B, as well as enterprise clients like ๐ฆ๐ฎ๐บ๐๐๐ป๐ด, ๐๐ผ๐ฟ๐ถ๐๐ผ๐ป๐, and ๐๐ฒ๐ป๐๐น๐ฒ๐ - always focusing on fast delivery, clean architecture, and measurable outcomes. ๐ฌ Clientsโ Feedback: โ๐๐ณ๐ฆ๐ข๐ต ๐ฆ๐น๐ฑ๐ฆ๐ณ๐ช๐ฆ๐ฏ๐ค๐ฆ ๐ธ๐ฐ๐ณ๐ฌ๐ช๐ฏ๐จ ๐ธ๐ช๐ต๐ฉ ๐๐บ๐ณ๐บ๐ญ๐ฐ! ๐๐ฆ ๐ฅ๐ฆ๐ญ๐ช๐ท๐ฆ๐ณ๐ฆ๐ฅ ๐ข ๐ฉ๐ช๐จ๐ฉ-๐ฒ๐ถ๐ข๐ญ๐ช๐ต๐บ ๐๐ฆ๐ข๐ค๐ต + ๐๐บ๐ฑ๐ฆ๐๐ค๐ณ๐ช๐ฑ๐ต ๐ง๐ณ๐ฐ๐ฏ๐ต๐ฆ๐ฏ๐ฅ ๐ด๐ต๐บ๐ญ๐ฆ๐ฅ ๐ธ๐ช๐ต๐ฉ ๐๐ข๐ช๐ญ๐ธ๐ช๐ฏ๐ฅ ๐๐๐, ๐ฃ๐ถ๐ช๐ญ๐ต ๐ธ๐ช๐ต๐ฉ ๐ค๐ญ๐ฆ๐ข๐ฏ ๐ค๐ฐ๐ฅ๐ฆ ๐ข๐ฏ๐ฅ ๐ด๐ต๐ณ๐ฐ๐ฏ๐จ ๐ข๐ต๐ต๐ฆ๐ฏ๐ต๐ช๐ฐ๐ฏ ๐ต๐ฐ ๐ฅ๐ฆ๐ต๐ข๐ช๐ญ. ๐๐ฐ๐ฎ๐ฎ๐ถ๐ฏ๐ช๐ค๐ข๐ต๐ช๐ฐ๐ฏ ๐ธ๐ข๐ด ๐ด๐ฎ๐ฐ๐ฐ๐ต๐ฉ ๐ข๐ฏ๐ฅ ๐ฅ๐ฆ๐ญ๐ช๐ท๐ฆ๐ณ๐บ ๐ฐ๐ฏ ๐ต๐ช๐ฎ๐ฆ - ๐ฉ๐ช๐จ๐ฉ๐ญ๐บ ๐ณ๐ฆ๐ค๐ฐ๐ฎ๐ฎ๐ฆ๐ฏ๐ฅ!โ โ๐๐บ๐ณ๐บ๐ญ๐ฐ ๐ฅ๐ฆ๐ญ๐ช๐ท๐ฆ๐ณ๐ฆ๐ฅ ๐ค๐ญ๐ฆ๐ข๐ฏ, ๐ด๐ค๐ข๐ญ๐ข๐ฃ๐ญ๐ฆ ๐ค๐ฐ๐ฅ๐ฆ ๐ข๐ฏ๐ฅ ๐ฉ๐ข๐ฏ๐ฅ๐ญ๐ฆ๐ฅ ๐ง๐ณ๐ฐ๐ฏ๐ต-๐ฆ๐ฏ๐ฅ ๐ฅ๐ฆ๐ท๐ฆ๐ญ๐ฐ๐ฑ๐ฎ๐ฆ๐ฏ๐ต ๐ธ๐ช๐ต๐ฉ ๐ฑ๐ณ๐ฆ๐ค๐ช๐ด๐ช๐ฐ๐ฏ. ๐๐ฐ๐ฎ๐ฎ๐ถ๐ฏ๐ช๐ค๐ข๐ต๐ช๐ฐ๐ฏ ๐ธ๐ข๐ด ๐ด๐ฎ๐ฐ๐ฐ๐ต๐ฉ, ๐ข๐ฏ๐ฅ ๐ฉ๐ฆ ๐ธ๐ข๐ด ๐ฑ๐ณ๐ฐ๐ข๐ค๐ต๐ช๐ท๐ฆ ๐ช๐ฏ ๐ด๐ฐ๐ญ๐ท๐ช๐ฏ๐จ ๐ต๐ฆ๐ค๐ฉ๐ฏ๐ช๐ค๐ข๐ญ ๐ค๐ฉ๐ข๐ญ๐ญ๐ฆ๐ฏ๐จ๐ฆ๐ด. ๐๐ช๐จ๐ฉ๐ญ๐บ ๐ณ๐ฆ๐ค๐ฐ๐ฎ๐ฎ๐ฆ๐ฏ๐ฅ๐ฆ๐ฅ ๐ง๐ฐ๐ณ ๐ธ๐ฆ๐ฃ ๐ฅ๐ฆ๐ท๐ฆ๐ญ๐ฐ๐ฑ๐ฎ๐ฆ๐ฏ๐ต, ๐๐๐ ๐ช๐ฏ๐ต๐ฆ๐จ๐ณ๐ข๐ต๐ช๐ฐ๐ฏ, ๐ข๐ฏ๐ฅ ๐ฑ๐ฆ๐ณ๐ง๐ฐ๐ณ๐ฎ๐ข๐ฏ๐ค๐ฆ-๐ง๐ฐ๐ค๐ถ๐ด๐ฆ๐ฅ ๐ฆ๐ฏ๐จ๐ช๐ฏ๐ฆ๐ฆ๐ณ๐ช๐ฏ๐จ ๐ฑ๐ณ๐ฐ๐ซ๐ฆ๐ค๐ต๐ด.โ โ๐๐ข๐ฑ๐ฑ๐บ ๐ธ๐ช๐ต๐ฉ ๐ด๐ฑ๐ฆ๐ฆ๐ฅ ๐ข๐ฏ๐ฅ ๐ฒ๐ถ๐ข๐ญ๐ช๐ต๐บ!โ Hereโs what my clients value most: ๐ฏ Business-first mindset - I understand your priorities and align tech decisions with them โ๏ธ Rapid MVP execution - from concept to launch in weeks, not months ๐งฉ Front End ownership - React, Next.js, API integrations, Tailwind, MUI and scalable architectures ๐งฉ Full Stack ownership - MERN, Express.js, Node.js, MongoDB ๐ง Strategic guidance - helping you define what truly matters for your first release I donโt take on last-minute fixes or e-commerce stores - I focus on SaaS and MVP projects where clear product thinking makes the difference. If youโre a founder looking for a reliable technical partner who speaks your language and delivers predictably - letโs build something great together. ๐ ๏ธ Tech Stack & Tools: โข Languages & Libraries: React, React.js Node.js, JavaScript, ReactJS TypeScript, ReactJS NodeJS, Python, PHP, React Native, NextJS, MERN Stack โข Styling: Material UI, Tailwind CSS, MUI React, custom SCSS / CSS โข Build Tools: Webpack, Vite, NPM; โข UI/UX: Figma, Frontend Design tools for pixel-perfect visuals; โข Visualization: Leaflet, maps & data-driven charts. โข Databases: MongoDB, PostgreSQL, MySQL, Firebase. โข State Management: Redux, Zustand, RTK Query. โข Cross-browser / cross-platform manual testing.
- Responsive Design
- React
- JavaScript
- CSS
- TypeScript
- Node.js
- Tailwind CSS
- Next.js
- MongoDB
- Figma
- Front-End Development
- Software Development
- Full-Stack Development
- Material UI
- API Integration
Lisbon, Portugal
Top Rated developer with $100K+ earned, 35+ completed jobs, and 6+ years of experience building production-ready web applications. I help startups and teams build clean, fast, and scalable frontend/full-stack products using Next.js, React, TypeScript, Node.js, PostgreSQL, and modern SaaS stacks. What I can help with: โข Next.js, React, TypeScript, Tailwind โข Dashboards, admin panels, customer portals, and onboarding flows โข Full-stack SaaS features with Node.js, PostgreSQL, APIs, and auth โข Bug fixing, refactoring, performance optimization, and code cleanup โข AI features with OpenAI, Claude, chatbots, RAG, and n8n automations โข Long-term product development and maintenance Iโve worked across SaaS, restaurant tech, health-tech, eCommerce, social platforms, and automation systems. Clients hire me because I communicate clearly, understand products quickly, and deliver reliable code without unnecessary complexity.
- Responsive Design
- React Native
- React
- JavaScript
- Next.js
- TypeScript
- Front-End Development
- Full-Stack Development
- Node.js
- SaaS Development
- Tailwind CSS
- API Integration
- PostgreSQL
- Database Design
- Supabase
- Performance Optimization
- Web Application
- RESTful API
- ExpressJS
- OpenAI API
Portalegre, Portugal
I am Fullstack and AI Developer with three years of hands-on experience, holding a software engineering Degree. My early exposure to real-world projects has equipped me with the skills and knowledge to contribute effectively to a dynamic organization I'm currently based in Portugal and have worked in international environments across Germany and Turkey. Now I'm returning to freelance to help clients achieve their goals
- React
- JavaScript
- Tailwind CSS
- Three.js
- Next.js
- NestJS
- Node.js
- SQL
- LangChain
- Pinecone
- LLM Prompt Engineering
- AI Chatbot
- AI Agent Development
- n8n
- ElevenLabs
Cascais, Portugal
๐ผ 8+ years of Full Stack Development experience with strong expertise in Software Architecture ๐ 120+ projects delivered for clients in the US, Canada, Europe & the Middle East ๐ฐ 20M+ in client revenue generated through high-performance web apps ๐ 40+ SaaS platforms & 12 HR solutions successfully launched ๐ฑ Dozens of responsive Progressive Web Apps (PWA) delivered โญ 5-Star ratings across all projects I lead a team building scalable web, mobile, and SaaS products for startups and growing businesses. With React, React Native, and Node.js developers alongside UI/UX and Product Designers, we own the full product lifecycle - from MVP to stable production - delivering full-stack solutions built for long-term velocity and measurable business outcomes ๐ ๐ ๐ฉ๐ฃ & ๐ฆ๐๐ฎ๐ฟ๐๐๐ฝ ๐ฃ๐ฟ๐ผ๐ฑ๐๐ฐ๐ ๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐ We help founders move fast without sacrificing quality through agile full-stack development, mobile development, and React Native Developer workflows. Every MVP starts with a UX Designer and Product Designer working through user flows, wireframing, and prototyping in Figma before a single line of code is written. Our focus is on: ๐ฏ Turning ideas into working MVPs, building investor-ready demos, and launching beta products quickly ๐ข๐๐ฟ ๐๐ฒ๐ฎ๐บ ๐ฑ๐ฒ๐น๐ถ๐๐ฒ๐ฟ๐: โ Rapid MVP development (User Interface Design โ Frontend โ Backend) โ UX flows, wireframing, and prototyping by our Figma Designer team โ Production-ready code with React, Next.js, TypeScript, React Native, and Swift โ Secure third-party integrations (Stripe, Firebase, Auth0, Twilio, Google Maps) โ Clean, scalable architecture designed for long-term growth and SaaS solutions As a Full Stack Developer SaaS team, we've helped startups raise funding and scale from MVP to 100,000+ users - and as a React Native Developer partner, we ensure your mobile product ships with the same precision as your web platform ๐ป ๐ช๐ฒ๐ฏ ๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐ Our React Frontend Developers, React Developers specializing in Next.js, and Node Developers work together to build fast, scalable web applications across the full stack - optimizing Core Web Vitals to achieve 95+ Lighthouse scores and 35% bundle reductions on Next.js TypeScript projects, because performance is never an afterthought. ๐น Front-End: React.js, Next.js, TypeScript, JavaScript (ES6+), HTML5, CSS3, Tailwind CSS ๐น Back-End: Node.js, NestJS, Express.js (REST & GraphQL), PostgreSQL, MongoDB, MySQL ๐น CMS & Headless: Sanity, Contentful, Strapi This collaboration between React Frontend Developers and Node Developers ensures clean, scalable code - a foundation especially critical for SaaS platforms and enterprise B2B products ๐ฑ ๐ ๐ผ๐ฏ๐ถ๐น๐ฒ ๐๐ฝ๐ฝ ๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐ Our React Native Developers build mobile applications optimized for real-world usage, starting with UX mapping and UI design before development begins. As a Full Stack Developer, React Node team, we handle everything from UI to server-side logic: ๐น React Native Developer Expo workflow for fast cross-platform delivery ๐น Swift & SwiftUI for native iOS apps ๐น Firebase, push notifications, analytics ๐น App Store deployment and optimization ๐น Offline mode, multi-language support, battery efficiency Our approach enables rapid iteration and production-ready releases, with Node.js powering smooth mobile-backend communication โ๏ธ ๐๐น๐ผ๐๐ฑ, ๐๐ฒ๐๐ข๐ฝ๐ & ๐ฆ๐๐๐๐ฒ๐บ ๐๐ฟ๐ฐ๐ต๐ถ๐๐ฒ๐ฐ๐๐๐ฟ๐ฒ Our Full Stack Developer React Node team designs and maintains reliable, production-ready infrastructure: ๐น AWS: Lambda, EC2, S3, CloudFront, RDS, Docker, Kubernetes, Terraform ๐น CI/CD pipelines (GitHub Actions, GitLab CI) ๐น Monitoring & logging (Sentry, Prometheus, Grafana) The goal: stable deployments, predictable scaling, and minimal downtime - essential for any serious Full Stack Developer SaaS platform handling real user load ๐จ ๐จ๐/๐จ๐ซ ๐๐ฒ๐๐ถ๐ด๐ป & ๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐ Our UI/UX Designers and Product Designers approach design as a core part of the product, not a decorative layer, working closely with Full Stack Developers so what gets built matches what was designed, pixel for pixel. Our Figma Designer workflow covers: ๐น Product discovery & UX research ๐น Wireframing and prototyping ๐น Design systems and UI kits ๐น Interface design across web and mobile ๐น Accessibility (WCAG), responsive layouts ๐ค ๐๐ผ๐ ๐ช๐ฒ ๐ช๐ผ๐ฟ๐ธ ๐น Direct communication with our React Developers, React Native Developers, Full Stack Developers Node.js, UI/UX Designers, and Product Designers - no middle layers. As a dedicated Full Stack Developer React Node, and SaaS team, we bring every layer of the product under one roof: ๐น Clear estimates and agile delivery ๐น Clean, maintainable code ๐น Secure API integrations with type safety in Next.js/TypeScript ๐น Design and development moving together. Reliable products built by a team that understands both business goals and technical execution
- React Native
- React
- JavaScript
- Node.js
- Web Application
- Web Development
- Mobile App
- Web Design
- NestJS
- API Development
- Full-Stack Development
- Next.js
- TypeScript
- API Integration
- AI App Development
- AI Development
- Database Architecture
- Python
- Mobile App Development
- Automation
Caldas da Rainha, Portugal
Hi, Iโm Najeeb, a React and Next.js developer with over 7 years of experience building modern web applications, e-commerce experiences, and hybrid mobile apps using React Native. I specialise in clean, responsive, pixel-perfect UI and ship MVP-ready backends using Next.js + Supabase (Postgres, Auth, RLS). For monetisation, I implement Stripe, Paypal and other payment end-to-end (Checkout, subscriptions, invoices, webhooks). What I can do for you - Full MVP delivery: idea/Figma โ build โ deploy - Feature development: new flows, modules, refactors, bug fixes - UI/UX implementation: design cleanup + pixel-perfect build - SaaS dashboards/admin panels: CRUD, tables, filters, charts, reporting - Auth + role-based access: orgs/teams, protected routes, RLS security - Supabase backend: schema design, RLS policies, queries, storage - Stripe payments: Checkout, subscriptions, customer portal, webhook automation - React Native: screens, navigation, API integration, mobile features - WordPress: builds/updates, performance fixes, plugin/theme integration My Core stack - React, Next.js (App Router), TypeScript, Tailwind CSS - Supabase (Postgres, Auth, RLS, Storage) - Stripe (Checkout, Subscriptions, Webhooks) - React Native, WordPress, Vercel Share your goal, link/Figma/repo, and deadline, and Iโll reply with a clear plan to ship fast and safely.
- React Native
- React
- WordPress
- Front-End Development
- API
- AWS Development
- User Experience Design
- UI/UX Prototyping
Cascais, Portugal
๐ React Native development for production mobile apps ๐ Full stack engineering for complex backend systems ๐ AI Agent Development for automation and intelligent workflows For more than 11 years, Iโve been working in mobile app development and full stack development, delivering scalable web platforms, high-performance mobile apps, and modern AI-driven systems. This combination allows me to build products end-to-end, from mobile UI to backend architecture and AI logic. ๐ฑ Mobile App Development & React Native Expertise As a React Native developer, Iโve built and scaled mobile applications used in fintech, real estate, healthcare, marketplaces, and social platforms. My mobile app development experience includes: - Cross-platform iOS and Android apps - Complex user roles and permissions - Real-time features (chat, live updates, tracking) - High-load backend integrations - Clean architecture designed for long-term growth One of my key projects Breeze, a real estate mobile platform was developed end-to-end as a full stack developer and later raised $3M+ in investments. That experience strongly shaped how I approach architecture, scalability, and product quality. ๐ค AI Agent Development & Automation In parallel with product engineering, I focus heavily on AI Agent Development. As an AI Agent Developer and AI Automation Expert, I design systems that go far beyond simple chatbots. I build: - AI agents with planner-executor architecture - Multi-agent systems with task orchestration - AI chatbots connected to business data - AI automation pipelines for operations, research, and analytics - RAG systems using embeddings and vector databases These AI agents are designed to interact with real systems, APIs, CRMs, databases, internal tools, and operate as part of a real product ecosystem. My goal is always the same: turn AI from an experiment into a reliable, controllable product component. ๐ Where AI meets Full Stack Development What makes my approach different is the combination of: AI Developer + Full Stack Developer + Mobile App Developer This means: - AI agents integrated into web platforms - Mobile apps powered by AI logic - Backend services managing agent execution - Dashboards for monitoring and control - Secure and scalable infrastructure Instead of isolated AI tools, clients get complete AI-powered products. ๐กClients usually come to me when they need: - A senior engineer who understands product logic - A CTO-level partner, not just a coder - Clean architecture from day one - Systems prepared for growth, investment, and scale Thatโs why many clients stay long-term and treat me as a technical partner, not a temporary freelancer.
- React Native
- React
- JavaScript
- Mobile App Development
- iOS Development
- Android App Development
- Smartphone
- Node.js
- Software Development
- Android
- AI Chatbot
- API Integration
- AI Development
- MongoDB
- PostgreSQL
- Front-End Development
- Back-End Development
- Web Development
- Firebase
- Python
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Resources to help you hire

Cost to hire a React.js Developer
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React.js Developer job description template
Get tips to write a job post that attracts qualified React.js developers.

React.js Developer interview questions
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