Hire the Best Data Scientists
in Spain

✅ Top 1% part of Upwork's Expert-Vetted program | NO AGENCY SOLO DEVELOPER 🎖️ 8 years+ of experience in Data Science 🏅 180+ Upwork Projects 💯 Less than 1 Hour Response time My specialty is to take your business problem and find a suitable end to end solution using AI and programming tools from Python, R, JavaScript programming languages. My extensive experience and wide skillset from data acquisition, model training to production grade application or REST API development will save you time and costs (material or psychological i.e. trying to find developers to make MVP, organize and support communication within team). AI Agentic systems are overtaking markets with potential impact on various businesses and creating opportunities to utilize. My skills in AI Agentic system development using Langchain, LangGraph, CrewAI, Autogen, RAG, MCP, Retell.ai, Elevenlabs will give you opportunities to cut costs and optimize your business operations. My skills include machine learning, deep learning, computer vision, web scraping, data engineering, web development, and data visualizations. I can create interactive web applications and dashboards using Python's Dash framework and R's shiny package so you will be able to observe, analyze and present various aspects of your business and other activities in practical ways. My expertise also includes the development of graphical user interface GUIs with Python's Kivy framework. In Computer Vision, my skills include image classification, object detection, and image segmentation with Python tools such as Tensorflow, Keras, CNNs (LeNet, AlexNet, VGG1619, InceptionV3, ResNet50), SSD, YOLO, TFOD, and Mask R-CNN. Importantly, I have skills in math and statistics essential for understanding processes behind code and interpreting outcomes from it. I have done my MBA with a focus on data science. I have been working as an accountant for around five years, including a member of the Big Four and as Data Scientist in a local IT company focused on DS. Thus, I understand finance from theoretical and practical sides and can apply code to analyze vast amounts of financial or other data efficiently. Considering my previous experience, my domain knowledge in finance, marketing (CTR, CLV), process optimization, and other business areas, I will focus on understanding your business goals and implementing solutions to make them come true. My skills include: ✅ Data Science ✅ Machine Learning ✅ Deep Learning ✅ Algorithmic Trading ✅ Generative AI ( Langchain, IIamaIndex, LangGraph, LangSmith, HuggingFace, StableDiffusion, Midjourney, OPEN AI, CHAT GPT4, CHAT GPT3.5, Mistral7B, Gemini, Cursor, Ollama, CrewAI, AutoGen, MCP, Google MCP Toolbox for Databases) ✅ Prompt Engineering (ICO, TESSA, ReAct, Chain of Thought, Map Reduce, Refine) ✅ AI Agents, Inbound & Outbound & Batch Calls, Chatbots, RAG, Conversational Agents, VAPI, Retell.ai, make.com, gohighlevel, n8n, telnyx, twilio ✅ Full Stack Development (React, React Native, Next.js) for AI integration ✅ Interactive Visualizations/Dashboards ✅ Data Engineering (MySQL, MongoDB, PostgreSQL, BigQuery, Oracle, SQLServer, Pinecone, ETL) ✅ Python, R, SQL ✅ Object Oriented Programming (OOP) ✅ PEP-8 (pylint, isort, flake8, autopep, black, docstrings, pydocstyle, mkdocs) ✅ Web development (interactive dashboards Dash) ✅ Bot Development (Telegram) ✅ Graphical User Interfaces (GUI) Kivy ✅ Big Data (Spark) ✅ Recommender Systems ✅ DevOps (ML Deep Learning model deployment on cloud, TDD, AWS, GCP, Azure, Docker, REST API) ✅ OCR ✅ Computer Vision ✅ Audio Processing ✅ Natural Language Processing NLP (Bert, fastText, Langchain) ✅ CNN (LeNet, AlexNet, VGG1619, InceptionV3, ResNet50) ✅ Object Detection (R-CNN, SSD, YOLO, TFOD API) ✅ Image Segmentation (Mask R-CNN) ✅ Transfer Learning ✅ Time Series Analysis (ARIMA, SARIMA, LSTM, PROPHET) ✅ OpenCV ✅ Educational Tutorials ✅ Web Scraping ✅ Web Crawling ✅ API Clients ✅ Keras, Tensorflow, PyTorch ✅ Dash, Shiny, Plotly, Streamlit, React, Next.js ✅ Pandas, Numpy, Scipy, Scrapy, Selenium, requests, ggplot2 ✅ IOT (Raspberry Pi) ✅ REST API (Google Ads, Google Analytics, FB/META API, Stripe, CCXT, OPEAI etc.) ✅ REST API development (Flask, FastAPI)

11 years building ML systems. PhD in Deep Learning for Document Analysis. Worked with Huawei, Repsol, Kantar Media. I deliver: LLM/VLM integrations (OpenAI, Claude, Gemini APIs) Computer vision pipelines (detection, classification, OCR) Full-stack AI apps (Django, FastAPI, React) RAG systems and document processing Workflow automation and API integrations I've published in top pattern recognition conferences and shipped production systems at scale. I write clean code, communicate clearly, and hit deadlines. Recent freelance work: NLP pipelines, fake review detection, document AI. Find me in linkedin at mcarbonellnunez

I have managed over $100M in ad spend, recovered $50M+ in hidden profit leakage, and scaled more than 300 e-commerce brands. Whether you have a strict ACoS target to hit, a new product launch to nail, or a significant budget that needs to be deployed intelligently, my team and I have the experience to execute it. We are a highly focused, boutique agency. We do not outsource, and we are not a large BPO where your account gets handed off to a junior account manager. When you work with us, you work directly with me and my core team. That team includes former Amazon employees, professionals with 15+ years of digital marketing experience, MBAs, and founders who have built and successfully exited their own e-commerce businesses. I am a PhD-trained researcher (University of Washington) specializing in consumer decision-making. We combine a deep understanding of buyer psychology with disciplined, data-driven architecture to hit your KPIs. Our Core Capabilities: 1. Amazon Advertising Management (PPC & DSP) We build and execute full-funnel strategies across Sponsored Products, Brands, Display, and DSP. We structure campaigns to acquire new customers at a profitable CAC while protecting your organic rank. Context: We recently deployed a targeted strategy for a supplement brand, scaling them from 38% to 22% ACoS while tripling their daily unit volume to generate $7.1M in 4 months. 2. Profit Recovery & Audits Amazon's fee structure is complex, and errors happen constantly. We run deep forensic audits across 12+ claim types to identify lost inventory, overcharged fees, and unclaimed reimbursements, managing the entire recovery process. Context: We recently recovered nearly $165,000 in a single audit for a client. 3. Brand Health & Listing Optimization As Amazon's search algorithm evolves with AI systems like Rufus and Cosmos, traditional SEO tactics are obsolete. We resolve suppressed listings and structure your copy to index perfectly for Amazon's algorithms while converting human buyers. Context: We revived a suppressed ASIN within a week that was losing $33,000 a day in sales (and leaked over $1.6M before we got hired) How We Work We operate as a strategic extension of your business. If you are an established brand generating at least $500K+ annually and you need a dedicated, senior-level team to hit your targets, send me a message. We can set up a brief call to look at your account, discuss your objectives, and determine if we are the right team to help you reach them.

⭐ Top 1% of Data Science talent on Upwork ⭐Trusted by 50+ clients worldwide⭐ 120+ projects and 7+ years of experience⭐Clear communication, transparent pricing, and top quality. I have worked across different sectors, including: 1.1 InnoSight Financial Planning (USA): I designed an optimal portfolio based on back-projected AI-powered financial indices. 1.2 Aeuthux (USA): I led a team of data scientists to build a web platform supporting investment decision-making. 1.3 Placeholder LLC (USA): I built a trading bot using machine learning deployed on AWS to operate in cryptocurrency markets. 1.4 ARCA-X (QATAR) I wrote research papers on the financial structure of non-central banking systems.

I help organisations make better decisions through data, analytics, modelling and intelligent systems. My work focuses on understanding business problems, designing practical solutions and implementing systems that improve visibility, planning, efficiency and decision-making. I believe technology should serve the decision, not the other way around. Over the years I have worked across data engineering, analytics, forecasting, optimisation, machine learning and software development. Rather than treating these as separate disciplines, I use them as tools that can be combined depending on the context and objectives of each project. I typically work on projects involving: • Decision support systems and business intelligence solutions. • Data architecture, databases and analytical infrastructure. • Forecasting and scenario analysis for planning and operations. • Optimisation and resource allocation problems. • Process automation and operational efficiency. • Machine learning and AI applications when they create measurable business value. • Custom analytical tools that help teams understand, evaluate and act with greater confidence. My approach is strongly business-oriented. Before discussing technology, I try to understand the context, constraints and decisions that actually matter. The goal is not to build the most sophisticated system possible, but the simplest solution capable of creating meaningful and lasting value. I enjoy working closely with clients, challenging assumptions, exploring alternatives and translating complex situations into clear, actionable decisions. I work fluently in English, Spanish and Catalan and have experience collaborating with international teams across analytical, technical and operational environments. If you are looking for someone who combines analytical rigour, technical capability and a genuine interest in understanding your business, I would be happy to discuss your project.

I am a skilled Data Scientist and AI/ML Engineer with extensive experience in both theoretical and experimental fields. I specialize in various areas of expertise: Artificial Intelligence: Proficient in developing and implementing AI solutions, including machine learning and deep learning models. Large Language Models: Skilled in natural language processing using state-of-the-art techniques and tools. Innovative Research: Experienced in conducting groundbreaking research projects that push the boundaries of current knowledge and technology. Scientific Data Analysis: Expert in processing and analyzing complex scientific data to derive meaningful insights. I utilize various programming languages and tools to achieve these objectives: Python: Proficient in Numpy, SciPy, Scikit-Learn, Keras, TensorFlow, Pytorch and more. R: Skilled in using RStudio and Shiny for data analysis and visualization. Matlab: Experienced in numerical computing and algorithm development. Web Development: Competent in HTML, JavaScript, Flask, and utilizing Amazon and other cloud solutions for robust web applications. IoT: Skilled in working with Arduino, Raspberry Pi, ESP8266, and other IoT technologies. I am committed to delivering high-quality results, and I am known for my ability to tackle even the most challenging and innovative projects. My diverse educational background and professional expertise ensure that I can bring a comprehensive and insightful approach to your project. Please review my work history for testimonials from previous clients. Thank you for considering my profile. I look forward to collaborating with you soon.