Hire the Best Recommender Systems Specialists
in Brazil

I have 8+ years of experience across industry and research, including 4 years in industry and 4 years during my PhD in Computer Science. My background is at the intersection of Data Science, Machine Learning, Operations Research, and AI systems, with experience building models, pipelines, dashboards, optimization algorithms, and decision-support tools. Recently, I have also been working with LLM-based workflows, RAG systems, A/B experimentation, analytics automation, and AI-assisted data products. I am especially useful when a project needs more than a generic dashboard or model — for example, when you need to combine data analysis, business logic, machine learning, optimization, and automation into one reliable system. What I Can Help You With A) Data Science, Analytics & Experimentation * Exploratory data analysis and business insights * A/B testing and experiment analysis * KPI design and performance measurement * Customer, product, dynamic pricing, and operational analytics * SQL data extraction, cleaning, and transformation * Automated reports and decision-support dashboards * Power BI and Streamlit dashboards B) Machine Learning & Predictive Modeling * Forecasting and demand prediction * Predictive analytics and scoring models * Classification, regression, and clustering * Model evaluation, validation, and improvement * Custom machine learning algorithms * PyTorch model development * End-to-end ML pipelines * Deployment-ready ML workflows C) LLMs, RAG & AI Automation * Retrieval-Augmented Generation, also known as RAG * LLM-powered search over documents or internal knowledge bases * AI assistants for business workflows * Prompt engineering and evaluation * LLM-based data extraction and summarization * Automating repetitive analysis or reporting tasks with AI * Prototyping AI tools using Python, APIs, and vector search concepts D) Operations Research & Optimization * Linear Programming, LP * Mixed-Integer Linear Programming, MILP * Quadratic Programming * Routing and network optimization * Inventory optimization * Pricing and allocation models * Custom optimization algorithms * Combining machine learning with optimization for better decisions Technical Skills: Python, SQL, PyTorch, Pandas, NumPy, Scikit-learn, Power BI, Streamlit, Git, AWS, PuLP, OR-Tools, Gurobi, NetworkX, APIs, LLM workflows, RAG, A/B testing, data pipelines, optimization modeling. Types of Projects I Am a Good Fit For: * Building dashboards that actually support business decisions * Analyzing experiments, campaigns, product changes, or pricing tests * Creating forecasting or prediction models * Automating manual data analysis workflows * Building RAG or LLM-based tools for internal documents * Designing optimization models for inventory, routing, pricing, or allocation * Turning messy data into a clean, useful analytical system My strength is combining strong technical depth with practical business thinking. I can help you go from a vague business problem to a working data, AI, or optimization solution.

I build AI systems that go beyond prototypes — production-ready, well-architected, and designed to scale. With 7+ years of experience across industry and academic research (MSc in NLP, published at ACL & WSDM), I bring both deep technical skills and a practical, results-driven approach to every project. My clients tend to stay. My longest engagement ran 3 years, and most of my UpWork projects have been 1+ year collaborations. I don't just write code — I ask the right questions, suggest better approaches, and make sure the final product actually works in the real world. 🔎 What I build ★ AI Agents & Chatbots — text, voice, multi-language (OpenAI, Anthropic, Azure AI, LiveKit) ★ RAG Pipelines — semantic search, vector databases, MCP servers, knowledge retrieval ★ NLP & LLM Applications — classification, entity recognition, summarization, Q&A ★ Data Extraction — OCR, web scraping, document parsing, transaction processing ★ Cloud-Native Backends — microservices, event-driven architectures, serverless ★ Real-Time Audio/Video Processing — transcription, translation, speaker diarization ★ MLOps & Monitoring — experiment tracking, evaluation, observability 🛠️ Tech I work with daily ★ Python: FastAPI, Flask, Streamlit, Pandas, scikit-learn, TensorFlow/Keras, spaCy, NLTK ★ AI/LLM: OpenAI, Anthropic Claude, DeepSeek, Gemini, LangChain, LlamaIndex, CrewAI, Guardrails AI ★ Cloud: AWS (Lambda, SQS, S3, Batch, EC2, RDS, SageMaker), Azure, GCP, Terraform, Docker ★ Databases: PostgreSQL, Supabase, MongoDB, DynamoDB ★ Vector DBs: Weaviate, Pinecone, Milvus, pgvector ★ MLOps: MLFlow, Langfuse, DeepEval, Weights & Biases, OpenTelemetry ★ Other: Tesseract OCR, Faster-Whisper, Pyannote, FastMCP, Selenium 🚀 Recent projects → 3-year AI platform for a finance company: chatbot (voice + text), OCR pipelines, merchant classification with GPT-4o, web scraping, MLOps setup → Real-time transcription & translation system on AWS for multi-language conferences: GPU-accelerated Whisper, speaker diarization, LangChain summarization → RAG backend with MCP server: semantic search across Slack, ClickUp, and Fireflies using Weaviate, LlamaIndex, and Supabase pgvector 📢 What clients say about me ▸ "Christian is a great developer, and asks relevant questions for the problems we give him, he's not just a 'pair of hands' but a helpful advisor for improving your initial suggestion on how to solve the problem. He's very fast to iterate and delivers code with great quality." ▸ "Went above and beyond to help with code for a large project, and completed tasks quickly and efficiently. Understood exactly what was needed for the job and executed with precision. I will absolutely be working with him again in the future!" Let's build something great — send me a message and let's talk about your project.

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.

Struggling to make data-driven decisions that truly impact revenue? You know your business needs to leverage AI and machine learning, but you're unsure how to implement it effectively. I specialize in transforming raw data into actionable insights that drive real financial results. What people I work with say about me: 🏅"Italo is one of the most talented and impactful professionals I've worked with. He not only brings technical prowess but also a sharp business acumen that drives real value." – Igor Aboim, Staff Data Scientist 🏅"His expertise in building dashboards and managing data operations has consistently optimized our processes. A truly excellent professional." – Viviane Ghedini 🏅"I highly recommend Italo for his outstanding work in database management, performance analysis, and campaign optimization." – Marcus Plaisant Here's what I've done for my clients and employers: 🤖 Multi-Agent AI System for Heineken Brazil: Developed a WhatsApp-based voice collection system that processes 2,000+ daily sales reports, analyzing 10,000+ hours of audio monthly to deliver real-time competitive intelligence across the entire country. 💰 Reduced absenteeism costs by $1M+/year using predictive modeling. 🔍 Developed AI-powered anomaly detection, saving $10M+ annually for Heineken Brazil. 📈 Increased e-commerce ROAS by 30% through Marketing Mix Modeling. 🤖 Designed and deployed Generative AI agents for HR automation and compliance validation. We're a great fit if you're thinking: 💭 "We have data but don't know how to maximize its value." 💭 "We need an AI expert who understands business impact, not just algorithms." 💭 "I want scalable, automated solutions—not just reports and dashboards." 💭 "I don't have time to learn data science. I need someone to execute and deliver." Working with me, you'll get: 🔮 Predictive models that increase efficiency and cut costs. ⚙️ AI-powered automation that eliminates manual work. 🔄 End-to-end solutions—from data pipeline setup to model deployment. 📊 AI-driven marketing insights to optimize ad spend and revenue. My expertise includes: 🧠 Machine Learning & AI: Python, XGBoost, NLP, LLMs, LangChain, LangGraph, LLMops, Multi-agent systems 🔧 Data Engineering: SQL, Databricks, Google Cloud, Azure, BigQuery, Azure OpenAI 📊 Marketing Analytics: Marketing Mix Modeling, Campaign Optimization, Competitive Intelligence 📈 Business Intelligence: Power BI, Looker Studio, Automated Insights Ready to unlock the full potential of your data? Click "Invite to Job" and let's discuss how I can help your business grow through AI and data science!

I am a Data Scientist and AI Engineer with 10+ years developing data-driven solutions for academic research, startups, Fortune 500 companies, and freelance consultancy. I specialized in designing intelligent, production-ready solutions using Python, machine learning, and generative AI. Whether you need custom ML pipelines, LLM-powered applications, or expert guidance on your data challenge, I deliver results grounded in real business impact. I can help you with: ✅ Data Science & Analytics - Clean and transform messy data into actionable insights - Statistical analysis, reporting, and robust Python pipelines for reproducible, maintainable workflows. ✅ Machine Learning & Deep Learning - Classical ML (scikit-learn): Predictive models, anomaly detection, clustering, and more - Deep Learning (PyTorch) for computer vision (object detection), document intelligence, and more. - MLOps: End-to-end deployment with Docker, CI/CD, version control, and monitoring ✅ Generative AI & Chatbots - LLM Solutions: AI assistants, chatbots, and advanced RAG systems. - Prompt optimization and fine‑tuning for domain‑specific tasks. ✅ AI Consulting & Mentorship - For Companies: AI readiness assessment, project scoping, and implementation strategy - For Individuals: Career guidance, portfolio development, and strategic roadmap planning I also speak at conferences and contribute to Python open-source projects. Let’s connect and turn your data challenges into actionable outcomes.