Hire the Best React.js Developers
in Brazil

Building intelligent, scalable web applications is my specialty. As a Full Stack Developer, I bridge the gap between robust backends and dynamic frontends, along with having experience on integrating AI Agents into modern software architectures. Whether you need a complex SaaS platform, an AI-powered automation/scraper tool, or a high-performance API, I deliver clean, efficient, and maintainable code. My Core Tech Stack 🤖 AI & Backend: Python, FastAPI, AI Agents (LLM integration, LangChain, etc.), Node.js 🖥️ Frontend: React.js, JavaScript/TypeScript, HTML5, CSS3, TailwindCSS 🚀 Cloud & DevOps: AWS (EC2, Lambda, S3), Docker, Git/Github, DigitalOcean, Redis 🔌 Others: Stripe Integration, Vercel, API limits and security measures. 🍒 The Cherry on Top: Full Support after Delivery. That's right, no additional cost. If anything breaks or you need minor changes, I will do it for free, ASAP.

A Senior Software Engineer who can help you by making any type of website or mobile app. Please, check my portfolio to see examples. 🧰 My skill set - Programming Languages: Javascript | Dart - Front-end: ReactJS | VueJS | NextJS | HTML | CSS | SCSS | Bootstrap - Back-end: NodeJS, NestJS, Express | Docker | Firebase - Database: SQL | MySQL | PostgreSQL | MongoDB - Mobile: React Native, Expo | Flutter - QA: Manual functional, test automation - Others: Figma | WordPress | Puppeteer (Web Scraping) 👨🏻‍💻 About me A BSc in Computer Science who has worked as a Full-stack Web Developer for about seven years, and loves solving complex problems and learning from them. Also an avid contributor to the open-source community that likes to develop side projects as a way of learning. Recently founded a software house company called iOHub Digital to help companies automate their processes and build a digital presence.

👋 Introduction Hi, I’m a Senior Full-Stack Developer with 8+ years of experience building modern, scalable web applications for startups and growing businesses. I specialize in SaaS platforms, production-ready MVPs, dashboards, and AI-enabled web apps using React, Next.js, TypeScript, and Supabase. My strength lies in combining polished, UX-driven frontend development with a pragmatic, scalable backend, helping founders ship faster without accumulating technical debt. I don’t just write code - I help turn ideas into real, usable products that are ready for users, revenue, and growth. 📌 Current Status ✅ Available for freelance & long-term contracts 🌍 Open to working across all time zones ⏱️ 40+ hours/week if required 🧠 Professional Summary I help startups and product teams design, build, and scale frontend-heavy full-stack applications. My focus is on clean architecture, performance, and maintainability, ensuring the product remains easy to extend as the business grows. Whether you need: - A startup MVP from scratch - A SaaS dashboard with authentication & subscriptions - A Next.js frontend connected to Supabase or APIs - Or AI integrations using OpenAI I can take ownership from concept to production. 🚀 What I Build - SaaS platforms & subscription-based products - Startup MVPs & prototypes (production-ready) - Dashboards & admin panels - AI-powered web applications - Internal tools & data-driven apps 🧩 What I Handle - Frontend architecture & UI systems - Backend APIs, databases & authentication - Payments & subscription billing - Deployment, CI/CD & monitoring - Scaling & long-term maintainability 🛠️ Tech Stack & Skill Set 𝙁𝙧𝙤𝙣𝙩𝙚𝙣𝙙 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 - React.js - Next.js (App Router, Server Actions, SSR, SSG) - TypeScript & JavaScript (ES6+) - Tailwind CSS, shadcn/ui, Material UI (MUI) - Responsive & UX-focused UI development - State management (Redux Toolkit, Zustand) - Forms & validation (React Hook Form, Zod) - Data visualization (Chart.js, Recharts, D3.js) 𝑩𝒂𝒄𝒌𝒆𝒏𝒅 & 𝑭𝒖𝒍𝒍-𝑺𝒕𝒂𝒄𝒌 - Node.js, Python - Express.js & NestJS - Supabase (PostgreSQL, Auth, RLS, Realtime) - Firebase - REST & GraphQL APIs - Authentication & role-based access - Database design & optimization (PostgreSQL, MySQL, MongoDB) 𝑪𝑴𝑺 & 𝑬-𝑪𝒐𝒎𝒎𝒆𝒓𝒄𝒆 𝑫𝒆𝒗𝒆𝒍𝒐𝒑𝒎𝒆𝒏𝒕 - WordPress Developer, WooCommerce - Shopify Developer, Shopify Admin API - PHP, Laravel - Custom E-commerce Solutions 𝑵𝒐-𝑪𝒐𝒅𝒆 / 𝑳𝒐𝒘-𝑪𝒐𝒅𝒆 𝑫𝒆𝒗𝒆𝒍𝒐𝒑𝒎𝒆𝒏𝒕 - Bubble Developer - Adalo, Glide, Thunkable - AppSheet, Softr, Bravo Studio, AppMySite 𝑪𝒍𝒐𝒖𝒅 & 𝑫𝒆𝒗𝑶𝒑𝒔 - AWS, Docker, NGINX - CI/CD (GitHub Actions, GitLab CI) - Firebase, Supabase, Vercel, DigitalOcean - Linux Server Administration - Database Scaling & Performance Optimization 𝑨𝑰 & 𝑨𝒖𝒕𝒐𝒎𝒂𝒕𝒊𝒐𝒏 - AI Integration, LLMs - OpenAI API, Claude - AI Agents, RAG Pipelines - AI Automation Workflows - Document Processing & Voice AI 𝑷𝒂𝒚𝒎𝒆𝒏𝒕𝒔 & 𝑻𝒉𝒊𝒓𝒅-𝑷𝒂𝒓𝒕𝒚 𝑰𝒏𝒕𝒆𝒈𝒓𝒂𝒕𝒊𝒐𝒏𝒔 - Stripe Integration, Paystack, Flutterwave - Twilio, LiveKit, VoIP Systems - Mapbox Integration - LinkedIn Ads API 𝑺𝒂𝒂𝑺 & 𝑰𝒏𝒕𝒆𝒈𝒓𝒂𝒕𝒊𝒐𝒏𝒔 - Stripe (payments, subscriptions, billing) - OpenAI / LLM API integrations - Third-party API integrations - Webhooks & background jobs 𝑫𝒆𝒗𝑶𝒑𝒔 & 𝑻𝒐𝒐𝒍𝒊𝒏𝒈 - Vercel, AWS - Docker - CI/CD (GitHub Actions) - Monitoring & error tracking (Sentry, PostHog) - Git (GitHub, GitLab) 𝑷𝒓𝒐𝒅𝒖𝒄𝒕𝒊𝒗𝒊𝒕𝒚 & 𝑨𝑰 𝑻𝒐𝒐𝒍𝒔 - Cursor - GitHub Copilot - Claude Code - Replit / Lovable - Prompt Engineering & AI-assisted development 🧪 Experience Highlights - Built and shipped multiple SaaS platforms used by real customers - Delivered startup MVPs from idea to production in weeks - Designed secure Supabase backends with RLS and scalable schemas - Implemented subscription billing systems with Stripe - Created high-performance dashboards and admin panels - Integrated AI features to automate workflows and user interactions 🏷️ Tags / Keywords (SEO Optimized) Senior Full-Stack Developer, Frontend-Focused Full-Stack, SaaS Developer, MVP Developer, Startup Developer, Product Engineer, React Developer, Next.js Developer, TypeScript Developer, Supabase Developer, PostgreSQL, Stripe Integration, Dashboard Developer, Admin Panel Developer, AI Web Developer, OpenAI Integration, Subscription Billing, Scalable Web Apps 🤝 Why Work With Me? - Product-focused mindset (not just tasks) - Clean, maintainable, scalable code - Strong communication & ownership - Startup experience - I understand speed and quality - Long-term thinking, even for MVPs ✅ Closing Statement If you’re looking for a reliable senior developer who can take your idea seriously and turn it into a professional-grade product, I’d be happy to help. Let’s build something impactful 🚀

Hey there! This text was not generated by AI! 😉 I'm here to help you with software architecture from scratch. We have assisted many people in building software from the ground up and refactoring their legacy projects to make them more modern, secure, and efficient. We know what we’re doing. Let’s schedule a quick 10-minute call to discuss your project and explore how we can work together. I look forward to hearing from you! Keywords: AWS, Serverless, AWS Lambda, Microservices, REST APIs, Cloud Architecture, CI/CD, Docker, Scalable Systems, High Availability, Distributed Systems, NoSQL & SQL Databases, Performance Optimization, Security Best Practices.

🚀I am a Full Stack Developer with 6+ years of experience specializing in React.js, Next.js, TypeScript, Python, Node.js, C#, .NET and cloud computing. I have strong expertise in frontend & backend development, API design, SQL and NoSQL databases, and building scalable systems on AWS. I deliver high-quality web applications using modern frameworks like NestJS and Tailwind CSS, with a focus on performance, security, and user experience. Passionate about solving complex problems and continuous learning, I thrive in collaborative, fast-paced environments. 💪I continuously invest in my skills and hold certifications in Full Stack Development (Growdev), Backend and Python & Cloud Computing (Tera Treinamentos Profissionais LTDA), and React.js (Tera Treinamentos Profissionais LTDA). I also completed the NLW Connect React Program with Rocketseat, deepening my expertise in modern React ecosystems. 💼 Tech Stack Highlights: ● Frontend: React.js, Next.js, Angular, TypeScript, JavaScript, Tailwind CSS, MUI ● Backend: Node.js, Express.js, Python, Django, FastAPI, C#, .NET, RESTful APIs, ● Databases: SQL, PostgreSQL, MySQL, MongoDB, Firebase, ● Cloud & DevOps: AWS (S3, Lambda, API Gateway, ECS), Azure, Docker, Kubernetes, CI/CD pipelines ● Authentication: OAuth2, JWT, Firebase Authentication ● Other Tools & Technologies: Postman, Git, Stripe integration, AI/ML, Large Language Models (LLMs) 🔧 I’m passionate about solving real-world problems, bringing clean, efficient code and clear communication to every project. Whether you're starting from scratch or scaling an existing system, I'm here to build with you—fast, reliably, and professionally. Let's connect and embark on a journey to create software that stands out and delivers results!

Need a senior architect who designs business-focused solutions and handles backend AI pipelines, RAG, or complex ETL at scale? Whether Python, Node.js, Go, or many others, I've shipped production systems for 16+ years, including: HIPAA-compliant platforms, identity infrastructure, and LLM-powered APIs on AWS. What sets me apart: behind my backend specialization, speed, quality, and cost stay balanced because you see every trade-off and make the call with me. I don't just wire up an API. I architect the data flow, own the cloud infrastructure, and handle complex auth (OAuth2, OIDC, SAML),so you don't need to manage different contractors. With Top Rated Plus status and $150K+ earned across 7 active contracts, my clients keep coming back for two simple reasons: I communicate clearly, and I ship on time. 🐍 Python backends — FastAPI, Flask, Django, async workers, parallelism ⚡ Node.js / TypeScript APIs — Express.js, Nest.js, REST, GraphQL, Supabase integrations 🐹 Golang services — high-performance APIs, concurrency, microservices 🤖 AI & RAG pipelines — LLM orchestration, vector search, embedding workflows 📊 ETL & data engineering — GCP BigQuery, PostgreSQL, MongoDB, Kafka, RabbitMQ, SQS ☁️ Cloud & DevOps — AWS (Lambda, EC2, S3, Step Functions), GCP, Docker, Kubernetes, Helm 🔐 Identity & Auth — OAuth2, OIDC, SAML, OpenID Connect 🌐 Full-stack when needed — React.js, Next.js, Redux, Vue.js ✅ Top Rated Plus on Upwork — top 3% of talent ✅ 16+ years of software development experience ✅ Led HIPAA-compliant mental health platform as sole technical owner (Node.js + AWS) ✅ Redesigned inbound identity module of Gluu, open-source IAM platform (SAML → OpenID Connect proxy) ✅ Certified: Programming with Google Go (UC Irvine) | Cloud Native Dev with Node.js, Docker & Kubernetes ✅ Acted as Product Lead and CTO — I understand business context, not just code Send me a message with what you're trying to build or fix — a single sentence is enough to start. I'll tell you how I'd approach it and the trade-offs to expect, so you can evaluate the fit before we scope anything. Detailed spec or just a rough idea, send it over.