Freelancers for hire in Brazil
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Hire carlosd178
I’m a results-driven full-stack developer with strong expertise in modern front-end frameworks and backend technologies. I specialize in building elegant, scalable web applications using React, Next.js, Vue, Nuxt, and Tailwind CSS, while delivering robust server-side solutions with Laravel, NestJS, Django, FastAPI and...I’m a results-driven full-stack developer with strong expertise in modern front-end frameworks and backend technologies. I specialize in building elegant, scalable web applications using React, Next.js, Vue, Nuxt, and Tailwind CSS, while delivering robust server-side solutions with Laravel, NestJS, Django, FastAPI and Node.js. My experience includes creating interactive 3D experiences with Three.js and developing decentralized applications powered by Web3 and smart contracts. I enjoy translating complex requirements into clean, efficient code and intuitive user experiences. With a focus on performance, maintainability, and best practices, I help businesses launch high-impact digital products, from responsive websites to blockchain-based platforms, on time and at scale. less -
Hire melopgabriel
I'm a Full-Stack Web, Mobile, Blockchain & AI Expert with extensive experience building modern, scalable, and high-performing digital products from concept to deployment. I specialize in building AI-powered chatbots and conversational agents — from customer support and lead-qualification bots to RAG-based knowledge...I'm a Full-Stack Web, Mobile, Blockchain & AI Expert with extensive experience building modern, scalable, and high-performing digital products from concept to deployment. I specialize in building AI-powered chatbots and conversational agents — from customer support and lead-qualification bots to RAG-based knowledge assistants — integrating LLM APIs (OpenAI, Claude) into production-ready backends. I help startups, agencies, and businesses transform ideas into production-ready applications by combining clean development practices with the latest AI and automation technologies. Whether you need a custom web platform, mobile application, AI-powered solution, or workflow automation, I deliver reliable, maintainable solutions focused on performance, scalability, and user experience. ⭐⭐⭐⭐⭐What I can help you with ⭐ AI Chatbots & AI Agents ⭐ AI Integration (OpenAI, Claude, Gemini, LangChain, MCP) ⭐ Workflow Automation (n8n, Make.com, Zapier) ⭐ Full-Stack Web Development (React, Next.js, Vue.js, Laravel, Node.js, PHP) ⭐ REST APIs & Third-Party API Integrations ⭐ Mobile App Development (React Native, Flutter, Android, iOS) ⭐ Database Design (PostgreSQL, MySQL, Supabase, Firebase) ⭐ Blockchain Development (Solidity, Go, Flutter) and ICO handling ⭐ WordPress & WooCommerce Development ⭐ Shopify Store Development & Customization ⭐ AWS, Vercel, DigitalOcean & Cloud Deployments ⭐ Performance Optimization & Bug Fixing ⭐⭐⭐⭐⭐Why clients work with me ⭐ Clean, scalable, and well-documented code ⭐Strong communication and regular progress updates ⭐ Detail-oriented with a focus on quality ⭐Fast turnaround without compromising reliability ⭐Long-term support after project delivery ⭐Problem-solving mindset for complex technical challenges I believe great software is more than just writing code—it's about understanding business goals and building solutions that create measurable value. I take ownership of every project and work closely with clients to ensure the final product exceeds expectations. If you're looking for a dependable developer who can build, improve, or automate your business with modern web, mobile, blochain and AI technologies, I'd be happy to discuss your project. less -
Hire AnjosGustavo
I help startups and businesses build scalable, production-ready web applications and AI-powered solutions—from architecture and development to deployment and optimization. Senior Machine Learning Engineer with a strong foundation in mathematics, probability, statistics, and software engineering, focused on...I help startups and businesses build scalable, production-ready web applications and AI-powered solutions—from architecture and development to deployment and optimization. Senior Machine Learning Engineer with a strong foundation in mathematics, probability, statistics, and software engineering, focused on transforming complex ideas into practical, reliable AI solutions. Experienced in model building, statistical learning, deep learning, Computer Vision, NLP, Generative AI, LLMs, RAG, and AI agents, with Python as the primary development language. Comfortable working across the complete ML lifecycle - from data preprocessing and feature engineering to model development, evaluation, optimization, and deployment. Also brings strong full-stack engineering experience, enabling AI models to be integrated into scalable, production-ready applications. Enjoys solving challenging technical problems with a thoughtful, data-driven approach. 🚀 Full-Stack & SaaS Development - React, Next.js, Node.js, Python, FastAPI, Django - SaaS platforms, marketplaces, dashboards, and internal tools - REST APIs, PostgreSQL, authentication, and third-party integrations - Cloud deployment, performance optimization, and maintainable architecture 🤖 Machine Learning & AI - End-to-end ML pipelines: data processing, training, evaluation, optimization, and deployment - Computer Vision, NLP, ASR, Transfer Learning, Reinforcement Learning, and Generative AI - LLM, RAG pipeline and Agentic AI - PyTorch, TensorFlow, Keras, scikit-learn, NumPy, Pandas, and SciPy My strength is connecting both worlds: I can develop intelligent models and integrate them into secure, scalable applications that solve real business and engineering problems. I look forward to building practical, reliable, and intelligent products together. less -
Hire ConnectPro01
I'm a full-stack developer with solid hands-on experience, comfortable working across the entire stack from database modeling to building user interfaces. On a daily basis, I'm writing and reviewing code, squashing bugs, helping structure systems, and integrating third-party APIs. I've worked with a wide range of...I'm a full-stack developer with solid hands-on experience, comfortable working across the entire stack from database modeling to building user interfaces. On a daily basis, I'm writing and reviewing code, squashing bugs, helping structure systems, and integrating third-party APIs. I've worked with a wide range of technologies, including Next.js applications, Python automations, Shopify integrations, ERPs, email marketing platforms, and cloud deployments. I particularly enjoy tackling complex problems the ones that feel messy at first and breaking them down into smaller, manageable pieces until a clear and efficient solution emerges. I also like to explain my thinking as I code, so whoever I'm working with can follow along and even learn something along the way, if they're up for it. less -
Hire diegovisiso
I turn your idea into a clean, reliable mobile app — built right the first time. I'm a Computer Science graduate specializing in Android development. I build native Android apps with Kotlin and Java, and cross-platform apps with Flutter and React Native, handling everything from UI and navigation to databases and...I turn your idea into a clean, reliable mobile app — built right the first time. I'm a Computer Science graduate specializing in Android development. I build native Android apps with Kotlin and Java, and cross-platform apps with Flutter and React Native, handling everything from UI and navigation to databases and Firebase integration. What I can build for you: ✔ Native Android apps (Kotlin / Java) ✔ Cross-platform apps (Flutter, React Native) ✔ Firebase integration — authentication, real-time database, cloud storage, notifications ✔ Database design and integration (SQLite, MySQL) ✔ Bug fixes and improvements for existing Android apps Why work with me: ✔ Clean, scalable code using modern Android practices (OOP, View Binding, Navigation Components) ✔ Clear communication and honest timelines — you'll always know where your project stands ✔ Careful testing before every delivery Before moving into development, I worked in IT support and network analysis, so I know how to listen to what users actually need, solve problems under pressure, and explain technical things in plain language. Native Portuguese speaker — happy to work with clients in Portuguese or English. Send me a message about your project and I'll get back to you quickly. Let's build something great. less -
Hire michela542
⭐ AI Agent Developer | Full-Stack SaaS Engineer | MVP & Automation Expert ⭐ I'm Michel Adelino, a Full-Stack AI Engineer with 6+ years of experience helping startups and businesses build AI-powered SaaS platforms, AI agents, chatbots, automation systems, and MVPs. I specialize in turning ideas into scalable products...⭐ AI Agent Developer | Full-Stack SaaS Engineer | MVP & Automation Expert ⭐ I'm Michel Adelino, a Full-Stack AI Engineer with 6+ years of experience helping startups and businesses build AI-powered SaaS platforms, AI agents, chatbots, automation systems, and MVPs. I specialize in turning ideas into scalable products using modern AI technologies, cloud infrastructure, and automation platforms. Whether you need an AI SaaS MVP, a custom GPT chatbot, a voice AI assistant, or workflow automation, I can deliver reliable and production-ready solutions. What I Can Build ✅ AI Agents & Multi-Agent Systems - OpenAI, GPT-4, Claude, Gemini, Llama - LangChain, LangGraph, CrewAI - RAG (Retrieval-Augmented Generation) - Knowledge Base AI Assistants ✅ AI Chatbots & Custom GPT Solutions - Customer Support Bots - Sales & Lead Generation Bots - Internal Business Assistants - Website & SaaS Chatbots ✅ Voice AI & Call Automation - VAPI, Retell AI, ElevenLabs, Twilio - Appointment Booking - Lead Qualification - Inbound & Outbound Calling Systems ✅ SaaS MVP Development - Multi-Tenant SaaS Platforms - Subscription & Billing Systems - Stripe Integration - Admin Dashboards - User Management & Authentication ✅ Workflow Automation - Make.com - Zapier - n8n - HubSpot - Airtable - CRM & API Integrations Tech Stack Frontend: Next.js, React, TypeScript Backend: Node.js, NestJS, FastAPI, Django, Laravel AI & LLMs: OpenAI, GPT-4, Claude, Gemini, Llama, LangChain, CrewAI, LangGraph Databases: PostgreSQL, MongoDB, Pinecone, Qdrant Cloud & DevOps: AWS, GCP, Azure, Docker, Kubernetes, Vercel Payments: Stripe Why Work With Me? ✔ Built AI SaaS products and MVPs for startups and businesses ✔ Strong experience in AI agents, chatbots, voice AI, and automation ✔ Full-stack development from architecture to deployment ✔ Clean, scalable, and maintainable code ✔ Fast communication and reliable delivery ✔ Business-focused approach with long-term scalability in mind Keywords AI Agent Developer, AI Engineer, OpenAI Developer, GPT-4 Developer, ChatGPT Integration, AI Chatbot Developer, Voice AI Developer, SaaS Developer, SaaS MVP Development, Full Stack Developer, Next.js Developer, Node.js Developer, FastAPI Developer, LangChain Developer, CrewAI Developer, Automation Expert, Zapier Developer, Make.com Expert, n8n Developer, RAG Development, LLM Applications, Stripe Integration, AWS Developer. Let's build your AI SaaS, chatbot, AI agent, automation system, or startup MVP. less -
Hire brenob18
Senior Backend Engineer and AI Agent Engineer with experience building scalable distributed systems, LLM-powered applications, and high-throughput backend platforms used by hundreds of thousands of users. Strong background in Golang microservices, Python AI systems, and cloud-native infrastructure, with hands-on...Senior Backend Engineer and AI Agent Engineer with experience building scalable distributed systems, LLM-powered applications, and high-throughput backend platforms used by hundreds of thousands of users. Strong background in Golang microservices, Python AI systems, and cloud-native infrastructure, with hands-on experience designing RAG pipelines, AI agents, real-time APIs, and high-scale data platforms. Proven track record of leading backend architecture, improving developer productivity, and delivering production-grade AI systems in fast-paced startup environments. less -
Hire williamgcc
BEST product quality! Always delivering proposal to your satisfaction! SKILLS: Identity creation, Image manipulation, Photo retouch, Illustrations, Product design, Animation, Rendering, Video edition. Technical design, CAD, CAM, BIM. Electric, illumination, automation projects.BEST product quality! Always delivering proposal to your satisfaction! SKILLS: Identity creation, Image manipulation, Photo retouch, Illustrations, Product design, Animation, Rendering, Video edition. Technical design, CAD, CAM, BIM. Electric, illumination, automation projects. less -
Hire Ofabiosil
CapCut Video Editor Intermediate-level CapCut video editor with skills in video cutting, transitions, subtitles, effects, audio editing, AI-assisted editing, and social media content creation. Creative, detail-oriented, and continuously improving editing skills and AI techniques to create engaging and...CapCut Video Editor Intermediate-level CapCut video editor with skills in video cutting, transitions, subtitles, effects, audio editing, AI-assisted editing, and social media content creation. Creative, detail-oriented, and continuously improving editing skills and AI techniques to create engaging and professional-looking videos. less -
Hire rodrigoabecker
Software engineer focus on back-end using Java, Spring-Boot, Spring-Batch, Quarkus, Unit tests, databases, kafka, rabbit-mq, etc...Software engineer focus on back-end using Java, Spring-Boot, Spring-Batch, Quarkus, Unit tests, databases, kafka, rabbit-mq, etc... less
