Hire the Best Data Scientists in Barcelona, ES

I build production-ready AI workflow automations that help businesses reduce manual work, cut operational costs, and run more efficiently. If your team is spending hours copying data between tools, processing documents, updating CRMs, writing repetitive reports, handling messy spreadsheets, or managing workflows that should not depend on manual effort, I can help you turn that process into a reliable automated system. I specialize in custom AI automation solutions built with Python, APIs, LLMs, and cloud infrastructure. My work is not limited to quick prototypes or basic no-code workflows. I design and build tailored systems that fit the specific way your business operates, then deploy them properly so they can run in production. Projects I've Delivered: ✅ Patent Lawyer AI Agent - Drafts applications and responds to examiner rejections, saving 12-16 hours per month. ✅ Lead Magnet AI Chatbot - Transformed a Google Forms survey into an engaging chatbot, boosting completion rates by 27%. ✅ AI-Powered Customer Support - Intelligent chatbots that reduce human rep costs while improving response times. ✅ Appraisal Reports Analyzer - Automted document analysis and data extraction for a real-estate investment firm. Turning hours spent on analyzig a report to 15 minutes. ✅ Medical Procedures Classifier - Automated system for reading hospitalization reports and extracting the formal procedures that were performed. Built for a public hospital. I specialise in: 🌟 The entire Python AI/ML stack 🌟 Document processing and analysis 🌟 Data extraction from unstructured data sources 🌟 Document generation in formal templates 🌟 Web scraping and API integration 🌟 Agentic LLM workflows 🌟 Database management 🌟 AI evaluations and observability 🌟 Prompt and context Engineering 🌟 Deployment to production on GCP, AWS, Docker, Hetzner I jave a rich background that combines AI engineering, Data science, Python development, cloud deployment, and business consulting. That means I do not just write code, I take the time to understand the workflow, the bottleneck, the business goal, and the practical constraints before designing the solution. A good automation should not just “work in a demo.” It should be reliable, maintainable, and useful in the real world. What You Can Expect When Working With Me: ➡️ Deep understanding of your business goals and technical requirements ➡️ Clear communication throughout the project lifecycle ➡️ Custom solutions tailored specifically to your use case, not generic approaches ➡️ Creative problem-solving that finds insights others might miss ➡️ Rapid learning curve for domain-specific knowledge ➡️ Timely delivery and high-quality, documented code If you have a repetitive workflow, an internal process that is slowing your team down, or an AI automation idea you want to turn into a production-ready system, send me a message and I’ll help you map the best way to build it.

Many companies already have data. The real challenge is turning that data into better business decisions. That is where I help: I design decision systems that combine data science, forecasting, mathematical optimization, artificial intelligence and business automation to solve real operational and strategic problems. Every project starts with understanding how decisions are made inside the business before selecting the right analytical or AI-based solution. Whether the objective is improving demand planning, optimizing inventory, automating repetitive processes, reducing financial risk or building AI-powered workflows, my focus is always the same: delivering practical solutions that create measurable business value. 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵 Demand Forecasting & Predictive Analytics • Sales forecasting • Multi-horizon demand forecasting • Inventory planning • Time series modelling • Scenario analysis Supply Chain & Operations Optimization • Inventory optimization • Production planning • Resource allocation • Process optimization • Mathematical optimization models Pricing & Financial Analytics • Pricing optimization • Revenue analytics • Credit risk modelling • Financial forecasting • Decision support models AI Agents & Business Automation • AI Agents • Claude API • OpenAI API • LLM-powered workflows • Process automation • Intelligent business assistants • Workflow automation Business Intelligence & Decision Support • KPI dashboards • Executive reporting • Interactive analytics • Automated reporting • Business intelligence platforms 𝗦𝗲𝗹𝗲𝗰𝘁𝗲𝗱 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 - Designed a multi-horizon demand forecasting system for a growing e-commerce business to improve purchasing and inventory planning. - Developed a credit risk prediction model supporting consumer lending decisions within the financial sector. - Built a business intelligence platform that automated KPI reporting, customer monitoring and operational analytics. - Designed AI-powered workflows that automate business processes using Large Language Models and modern automation platforms. - Developed analytical and optimization models supporting production planning and operational decision-making in manufacturing environments. 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 Python • SQL • PySpark • Microsoft Fabric • Azure • Databricks • Power BI • Anaplan • Machine Learning • Deep Learning • Operations Research • Mathematical Optimization • Forecasting • GitHub Actions • Docker • n8n • Claude API • OpenAI API • AI Agents • Data Pipelines 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 1. Understand the business problem before writing a single line of code. 2. Design the simplest solution capable of solving the problem effectively. 3. Build scalable systems that integrate naturally into existing business processes. 4. Deliver measurable business impact through better planning, automation and decision-making. I enjoy working closely with clients, challenging assumptions, exploring alternatives and translating complex analytical problems into practical business solutions. If you're looking for someone who combines strong analytical skills, mathematical thinking, AI expertise and a genuine focus on business value, I'd be happy to discuss your project.

Data Scientist Hi, I’m Benjamin — a data scientist with 2+ years of experience in machine learning, NLP, and time series analysis, I’ve built everything from AI-powered research assistants to LLM pipelines that automate document analysis and save teams hundreds of hours. I specialize in: - Data Cleaning - Webscraping - Natural Language Processing (NLP) - Generative AI & Large Language Models (LLMs) - Time Series Forecasting - Causal Inference & A/B Testing - Retrieval-Augmented Generation (RAG) - Data-to-Text & Hybrid ML Pipelines Some of the cool things I’ve worked on: ✅ Built a multimodal chatbot using RAG that cut research time by over 70% ✅ Created a gender classification model for Spanish names with 96% accuracy ✅ Designed DeepQuery, a LangChain-based app to semantically search economic research ✅ Automated EU merger document analysis with fine-tuned LLMs, saving 25% of analyst time Whether you need a custom NLP solution, help fine-tuning your LLM, or an end-to-end data science project delivered with care, I’m here to make it happen. Let’s chat!

I am a product developer experienced in buiilding software and cloud infrastructure for small, mid-range, and large companies.

✅ 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)

I'm your guy if reliablity and self-autonomy is what you're looking for. - 6+ years work experience working on production level applications of Python. - Native English speaker. - An expert in bridging the dynamic gaps in the automation through LLM integration. Some of my achievements: - Created the back-end in Node.js of a country-level system that utilizes SMS to communicate to the front-end (the project won awards from the IMF & Bill and Melinda Gates Foundation) - Created a custom CRM for a U.N. Programme (Soil Doctors) using Sequalize as the ORM for data-modelling and interactions, React and Redux toolkit for frontend, Node.js and Express for backend - Built ETL pipelines for companies in the healthcare industry that have been sold over $100K - Created large-scale dynamic scraping solutions for large platforms (eg. Reddit, X, Yahoo) (with respect to their ToS) - Wrote and implemented a threshhold-detection algorithm that utilizes and automates MightyZap's actuators to detect significant threshholds of different pipettes Here is a condensed run-through of my experiences in various stacks: Specalized in Node.js, Flask, FastAPI, RESTful and GraphQL APIs, Selenium, Playwright, RPA. Experienced in ETL, LLM integration, SQL/NoSQL databases, AWS, Azure, GCP, CI/CD, Docker, Kubernetes, ML/AI, Algorithms. Expert in Linux server management, cybersecurity, cloud VPS, Docker, IaC