Hire the Best Machine Learning Engineers
in Brazil

⭐️⭐️ I am a Machine Learning engineer and Python/ C/ C++/C# developer based in Rio de Janeiro. I am excited to apply for your project and share my skills and experiences with you. ⭐️⭐️ ✅ - I have extensive experience in the field of AI 👨‍💻 and automation ⚙, and I am confident that my expertise can help you achieve your project goals. In particular, I wanted to highlight some of my recent experiences that I believe are relevant to your project requirements. ✅ - Firstly, I have experience in the Llama Index and Chroma DB / Pinecone, which I have used in a project for a client who needed to automate GSA contracts. I built a Python script system that creates nodes for understanding information from unstructured files and generating questions and answers using artificial intelligence. This project required advanced skills in data extraction and AI, which I believe can be beneficial to your project as well. ✅ - Secondly, as the Head of Product in a start-up company, I have developed a web app with Streamlit to provide a dashboard to our customers for automating and predicting data analysis for restaurant owners. This experience has taught me valuable skills in developing user-friendly and efficient systems for automation and data analysis, which I believe can be applied to your project. ✅ - Thirdly, I have developed a finance system for Quantum Enterprise in a hackathon. This project involved parsing thousands of unstructured PDFs using Python and an OpenAI GPT model. This experience has taught me advanced skills in data extraction and automation, which can be useful for your project requirements. ✅ - Finally, I am currently doing scientific research in ethics of AI at the university, which provides me with valuable insights into the ethical implications of AI, and how to use it responsibly. At the university, I studied computer vision, image processing, and the math behind machine learning. I have experience using Anaconda, TensorFlow, and OpenCV with Python. In addition, I have completed an Introduction to Machine Learning grid. I have also completed several automation projects, including data extraction from spreadsheets and analysis of PDF files. I have developed computer vision applications using Python, and I use good development practices to ensure high-quality code. Overall, I have completed ten automation projects, including one that involved extracting data tables from a spreadsheet in Tiny ERP and inserting them into an e-commerce enterprise network. ----------------------------------------------------------------------- ⭐️ My python stack: ⭐️ ✅ - I use Ananconda ✅ - I am developing using Pythonin the last 2 years. ✅ - I use the good practices of development. ✅ - I use TensorFLow ✅ - I use OpenCV with Python ✅ - I can develop Computer Vision Applications also in Python ✅ - I use Pyautogui, bs4, requests, selenium or playwright, and so on to automate computer stuff. ----------------------------------------------------------------------- If you are interested in seeing my work, please take a look at my portfolio on Github: github.com/gustavofelicidade/portfolio. I am confident that my skills and experiences will be a valuable asset to your project. Thank you for considering my proposal, and I look forward to hearing from you soon. Best regards, Gustavo Felicidade

Most AI/ML projects work in notebooks — but fail in production. I build the ones that actually run. I’ve led production AI systems in real-world environments, including large-scale energy solutions for ENGIE Brasil. I design and deploy end-to-end AI systems that handle incomplete data, noisy signals, and real-world constraints. I’m a Data Scientist and AI Engineer with a Ph.D. in Cognitive Science and 12+ years of experience. On Upwork, I’ve delivered 25+ projects, $50K+ in earnings, and maintain a 100% job success score as a Top Rated Plus freelancer. My work goes beyond modeling — I build systems that integrate into real workflows. I’ve built: * LLM-based systems (RAG pipelines, AI assistants, internal copilots) * Automation agents and decision systems * Time series models for energy, anomaly detection, and predictive maintenance I work best with clients who want to build something real — not just experiments. If you already have data and a clear problem, I can help you turn it into a working system.

Senior Machine Learning Engineer (Python) MAIN QUALIFICATIONS * Over than 5 years working as senior machine learning engineer and senior Python developer; * As a senior ML engineer I've been working with Python programming and Data Science since 2017 (in the last 4 years), in three projects involving NL Processing, Text Writing classification, Image classification. Some of my duties: * Computer vision: * Image Data augmentation; (Keras, Tensorflow) * Image DS creation; (OpenCV and Numpy) *Writing analisys: * Text Classification / Language processing; (NLTK) *ANN: * CNN creation with Tensorflow and Keras. * Over than 10 years working as C++ senior software developer; * Worked in the last 5 years as senior software engineer taking part in the design of proper software models for different engineering solutions, such as networking, message bus, sensing data collection, financial market calculation, data transformation, data caching and storage, hardware's

Businesses don't need more AI tools. They need fewer manual processes. I help companies automate repetitive work, connect disconnected systems, and build reliable workflows that save time and reduce operational costs. My background combines Software Engineering, Data Science, Machine Learning, and workflow automation, allowing me to go beyond no-code solutions when projects require custom development, integrations, or scalable architectures. Pleasure to meet you — I’m Henrique, a Software Engineer with 5 years of experience in tech and consulting. ___ 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝗯𝘂𝗶𝗹𝗱: ✅ Business process automation ✅ AI-powered document processing and data extraction ✅ CRM, database and API integrations ✅ Internal tools and operational workflows ✅ Reporting and data pipelines ✅ Custom software solutions when off-the-shelf tools aren't enough I’ve worked across industries like legal, healthcare, and internal tooling—always focused on building practical systems that save time, cut costs, and grow with your business. 𝗦𝗼𝗺𝗲 𝘁𝗵𝗶𝗻𝗴𝘀 𝗜’𝘃𝗲 𝗮𝗹𝗿𝗲𝗮𝗱𝘆 𝗯𝘂𝗶𝗹𝘁: 🔊 An audio transcription system for a legal office using self-hosted Whisper and automated reporting in PDF 🤖 A real-time chatbot backend using GraphQL, WebSockets, and LLMs with response times under 3 seconds 📊 Scalable data pipelines and APIs deployed on AWS, with strong performance and MLOps practices 🎥 Built an end-to-end AI content generation pipeline integrating multiple APIs, local LLMs, TTS systems, workflow automation, and structured data storage. Whether you're automating internal operations, processing large volumes of data, or connecting business-critical systems, I can help design a solution that is reliable, maintainable, and built to scale. 𝗡𝗼 𝘁𝗲𝗰𝗵 𝘀𝘁𝗿𝗲𝘀𝘀 — I handle the complex parts, explain things clearly, and make sure you stay in control. Have an idea in mind? I’m available to discuss it with no commitment — feel free to reach out.

MVP developer | Full Stack | Healthcare | Android/IOS | Saas | AI 🍀𝑩𝒓𝒊𝒏𝒈 𝒎𝒆 𝒂𝒏𝒚𝒕𝒉𝒊𝒏𝒈, 𝒂 𝒕𝒉𝒐𝒖𝒈𝒉𝒕 𝒑𝒓𝒐𝒃𝒍𝒆𝒎, 𝒂 𝒉𝒂𝒍𝒇-𝒇𝒐𝒓𝒎𝒆𝒅 𝒊𝒅𝒆𝒂, 𝒔𝒐𝒎𝒆𝒕𝒉𝒊𝒏𝒈 𝒚𝒐𝒖 𝒏𝒆𝒆𝒅 𝒕𝒐 𝒘𝒓𝒊𝒕𝒆, 𝒘𝒆 𝒘𝒊𝒍𝒍 𝒇𝒊𝒈𝒖𝒓𝒆 𝒊𝒕 𝒐𝒖𝒕 𝒕𝒐𝒈𝒆𝒕𝒉𝒆𝒓. 🚀 About Me I'm Jefferson Alves, a Full-Stack AI Engineer and Automation Expert with 8+ years of experience building AI-powered products, SaaS platforms, mobile applications, and business automation systems. I specialize in custom AI agents, GPT-powered chatbots, MVP development, AI voice solutions, and scalable web & mobile applications that help businesses automate workflows, improve customer engagement, and accelerate growth. Whether you need a fast MVP, a production-ready SaaS platform, a mobile app, or AI automation integrated into your business, I can take your idea from concept to launch. 💡 What I Offer • MVP Development for Startups & Founders Turn your idea into a working MVP quickly. I build scalable MVPs for AI SaaS products, marketplaces, mobile apps, and internal business tools using modern technologies like Next.js, React, React Native, Flutter, FastAPI, and Node.js. • AI Agent & Multi-Agent Systems Build intelligent AI agents using LangChain, LangGraph, CrewAI, OpenAI, Anthropic, and Gemini. From simple assistants to complex multi-agent workflows that automate real business processes. • AI Voice Agents & Calling Automation Develop AI-powered voice assistants for inbound and outbound calls, lead qualification, appointment booking, and customer support using VAPI, ElevenLabs, Twilio, SynthFlow, and Retell AI. • GPT Chatbots & Custom AI Solutions Create AI chatbots, knowledge bases, customer support systems, and RAG-powered applications tailored to your business and data. • Full-Stack SaaS Development Design and build multi-tenant SaaS platforms with authentication, subscriptions, user dashboards, APIs, payment systems, and cloud deployment. • Mobile App Development (iOS & Android) Build high-performance cross-platform mobile apps using React Native and Flutter. ✔ iOS & Android Apps ✔ SaaS Companion Apps ✔ Marketplace Apps ✔ Push Notifications ✔ Payment Integration ✔ AI-Powered Mobile Features ✔ Real-Time Functionality • AI-Powered Websites & Web Applications Build modern web applications enhanced with AI features such as chat assistants, recommendation engines, intelligent search, and workflow automation. • Workflow Automation & CRM Integration Automate repetitive processes using Zapier, Make com, n8n, Airtable, HubSpot, and custom API integrations to save time and increase efficiency. 🛠 Tech Stack ✔Frontend & Mobile Next.js, React, React Native, Flutter, TypeScript, JavaScript, Redux, Zustand, Tailwind CSS, Material UI, ShadCN UI, Bootstrap, HTML5, CSS3, Expo ✔Backend Node.js, NestJS, Express.js, FastAPI, Django, Laravel, Symfony, PHP, Python, REST API, GraphQL, WebSockets, Socket IO ✔AI & LLM Development OpenAI GPT-5, Claude, Gemini, Llama, DeepSeek, LangChain, LangGraph, CrewAI, AutoGen, OpenAI Assistants API, Function Calling, AI Agents, Multi-Agent Systems, Prompt Engineering, RAG, Vector Search, Semantic Search, AI Chatbots ✔Vector Databases & AI Infrastructure Pinecone, Qdrant, Weaviate, ChromaDB, FAISS, pgvector ✔Databases PostgreSQL, MySQL, MongoDB, Redis, Supabase, Firebase Firestore, Airtable ✔Cloud & DevOps AWS, Google Cloud Platform (GCP), Microsoft Azure, DigitalOcean, Docker, Kubernetes, Vercel, Cloudflare, Nginx, Linux, CI/CD, GitHub Actions ✔Authentication & Security JWT, OAuth, Google Login, Firebase Auth, Clerk, Auth0, NextAuth.js ✔Automation & Integrations Make com, Zapier, n8n, HubSpot, Pipedrive, Salesforce, Airtable, Webhooks, API Integrations ✔Voice AI & Communication VAPI, ElevenLabs, SynthFlow, Retell AI, Twilio, Deepgram, AssemblyAI ✔Payments & Subscriptions Stripe, PayPal, Paddle, RevenueCat ✔Real-Time & Messaging Socket IO, Pusher, Firebase Realtime Database, WebRTC ✔CMS & E-Commerce WordPress, WooCommerce, Shopify, Headless CMS ✔Tools & Project Management Git, GitHub, GitLab, Bitbucket, Jira, Trello, ClickUp, Notion ✔Deployment AWS EC2, AWS ECS, AWS Lambda, Railway, Render, Fly io, Vercel, Netlify, DigitalOcean 🎯 Why Clients Hire Me ✅ Startup & MVP Specialist ✅ Full-Stack Web & Mobile Development ✅ AI Agents & Automation Expertise ✅ Fast Communication ✅ Scalable Architecture ✅ Clean & Maintainable Code ✅ End-to-End Product Delivery ✅ Business-Focused Solutions 🤝 Let's Build Something Great Whether you're launching an MVP, building an AI SaaS platform, creating a mobile application, deploying AI agents, or automating business workflows, I'd be happy to help. Let's turn your idea into a scalable product.

Hello, I’m a Python Engineer with 8+ years of experience building smart, scalable web applications — from backend APIs to AI-powered features to responsive user interfaces with React. My specialties: -AI/ML integration – GPT-4, LangChain, custom chatbots, NLP pipelines -Backend development – FastAPI, Django, Flask, PostgreSQL, Redis, Celery -Frontend with React.js – Clean UIs, real-time interaction, strong API integration -Automation – Background jobs, data pipelines, third-party integrations -DevOps & Cloud – Docker, GitHub Actions, AWS (EC2, S3), CI/CD pipelines What I deliver: -Production-ready full-stack apps: Python + React -AI-enhanced features that solve real-world problems -Clean, testable, and well-documented backend code -Fast communication and reliable delivery Whether you need to integrate OpenAI into your product, build a backend from scratch, or launch a full-stack web app — I can help.