Hire the Best Data Scientists in Barcelona, ES

✅ 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 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'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

I help business teams turn complex data into predictive models, dashboards, and insights that support smarter decisions, quickly and reliably. Worked for 3+ years as an in-house data scientist at Scopely (publisher of games like Stumble Guys, Monopoly Go, Marvel Strike Force) and Tripledot Studios (Woodoku), where I delivered predictive models (LTV, churn, bidding), user segmentation, and data storytelling to inform product and marketing strategy. Skilled in Python, SQL, and cloud analytics platforms like Tableau and Looker. Available weekdays with efficient turnaround and clear communication.

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

Summary: I help organizations leverage the power of data and AI through the execution of data strategy tailored to each domain, organizational structure, technical readiness and business objectives, including hands-on development and mentoring. My ultimate goal is to ensure organizations achieve a solid ROI from their data applications and AI investments. Services: • Assess data for AI readiness • Provide data & AI strategy advice • Evaluate AI use-cases • Develop application prototype • Develop AI roadmap options • Analyze ROI for proposed solutions Experience & Education: Over the last 12 years, I have been focused on deriving meaning from data with the purpose of helping organizations make decisions based on observed and predicted patterns, using a combination of statistical analysis and domain knowledge across multiple sectors. I have developed practical data science, analytics and machine learning skills through production-level projects including high-impact national projects working with government entities, and leading private sector companies ranging from startups to Fortune 500s. Prior to my data career, I spent over 10 years in enterprise applications where I helped global organizations transform their operation through the implementation of top tier ERP, CRM and BI applications. My technical skills range from coding (ex. Python, R, SQL) for ETL and data modelling, machine learning and generative AI to data visualization (ex. PowerBI, Tableau, Looker), presentation and story telling. I hold a bachelor degree in Economics from the American University in Cairo, an MBA from INSEAD, and certificates and courses in statistical data analysis, data science and machine learning from other leading institutions.