Freelance Data Engineers in SpainFreelance Data Engineers in Spain
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HAMZA EL QADIRI's avatar
HAMZA EL QADIRI
Madrid, Spain
Data Engineering & AI,
New to Contra
Data Engineering & AI,
Cover image for The AI-Powered Modern Data Platform
The AI-Powered Modern Data Platform for E-Commerce is a cutting-edge solution that bridges the gap between complex data infrastructure and business users. This project combines a robust modern data stack with advanced AI capabilities, enabling natural language analytics over an enterprise-grade E-Commerce Data Warehouse. By leveraging Artificial Intelligence, Large Language Models, and Retrieval-Augmented Generation (RAG), this platform empowers business users to ask questions in natural language and receive actionable insights.
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34
Cover image for Azure Data Pipeline for E-commerce
Azure Data Pipeline for E-commerce Analytics : E-commerce teams drown in raw sales CSVs and scattered APIs—while revenue leaks hide in untracked product returns and regional stock-outs. I built a cloud-native, end-to-end analytics pipeline that turns chaotic transactional data into sub-minute Power BI insights, letting merchandisers act on trends before they become costly mistakes.
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Cover image for Spotify Loader Benchmark The Spotify Loader Benchmark is
Spotify Loader Benchmark The Spotify Loader Benchmark is a comprehensive framework for evaluating different data loading strategies on the Spotify dataset, providing insights into the performance of various loading mechanisms. By comparing sequential, vectorized, multithreaded, raw SQL, Celery-based, and Flink-based loaders, this project helps developers optimize their data loading processes. With its robust architecture and flexible design, the Spotify Loader Benchmark is an essential tool for anyone working with large datasets.
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Cover image for  Cyber Threat Intelligence Platform, An
 Cyber Threat Intelligence Platform, An end-to-end, high-performance, containerized cyber intrusion detection and telemetry processing platform.
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78
Data Engineer(4)
Miguel J. Garrido's avatar
Miguel J. Garrido
Esplugues de Llobregat, Spain
AI & Data Solutions with Perfectionist Passion
AI & Data Solutions with Perfectionist Passion
Cover image for Digit Recognition with ML
Digit Recognition with ML
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13
Cover image for LANGUAGE TRANSLATION USING SEQ2SEQ LEARNING
LANGUAGE TRANSLATION USING SEQ2SEQ LEARNING
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7
Cover image for Movie Retrieval System using NLP Models
Movie Retrieval System using NLP Models
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14
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Data Engineer(3)
Nicolas Kobelt's avatar
Nicolas Kobelt
Barcelona, Spain
I build the software that runs the business
New to Contra
I build the software that runs the business
Cover image for Company Brain. Facts you can
Company Brain. Facts you can trust from several sources Problem Small teams live in chat and notes. Prices, owners, and status drift across threads — and nobody has one place that stays true. What I built Company Brain: email, meetings, and Slack feed into structured facts. When something conflicts, it lands in a simple review inbox for a quick human check — not another wiki. Result Decisions stop drifting. The team gets searchable facts with a human still in the loop; pilots start white-glove and scoped.
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Cover image for Quinteros Viajes — lead-to-quote hub
Quinteros Viajes — lead-to-quote hub
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1
Cover image for PermitPal — evidence-backed permitting
PermitPal — evidence-backed permitting
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1
Cover image for Biventia — client mobile for capital
Biventia — client mobile for capital
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3
Data Engineer(1)
Kai Relaunch Dept's avatar
Kai Relaunch Dept
Madrid, Spain
AI Automation & Launch Recovery Specialist
New to Contra
AI Automation & Launch Recovery Specialist
Cover image for SchemaShield — Evidence-First Schema Change Preflight
SchemaShield — Evidence-First Schema Change Preflight
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Cover image for ScenarioReceipt: Evidence-Grounded Product UI
ScenarioReceipt: Evidence-Grounded Product UI
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9
Cover image for A schema rename passed every unit test. It still broke a rev...
A schema rename passed every unit test. It still broke a revenue dashboard. The query changed from order_total to gross_amount; the schema was valid, but downstream models still expected the old field. The fix isn't another linter. Before merge, ask four questions: Which assets depend on this field? Is the change additive, rename, type change, or removal? Can we generate compatibility SQL and dbt YAML before touching production? Is there a decision receipt reviewers can reproduce? I built a bounded public replay of that workflow. Start with the CRITICAL case: it blocks a lossy decimal-to-integer change when an ML consumer sits downstream, then exposes the lineage, affected queries, compatibility artifacts, and deterministic run ID. Demo: https://schema-shield.vercel.app (https://schema-shield.vercel.app)Source/evidence: https://github.com/ceodaradigu/schema-shield What schema operation should the next fixture cover? AI-assisted analysis, reviewed before publication by RELAUNCH DEPT.
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Cover image for Proofline Keeper — Transaction Firewall for AI Agents
Proofline Keeper — Transaction Firewall for AI Agents
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9
Data Engineer(1)
Juan Brekes's avatar
Juan Brekes
A Coruña, Spain
Lead Data Analyst. Data Engineering and Visualization Expert
Lead Data Analyst. Data Engineering and Visualization Expert
Cover image for Web Scrapping and Alert System With AWS and Airflow
Web Scrapping and Alert System With AWS and Airflow
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Cover image for Invoice Parsing System using Google Document AI and BigQuery
Invoice Parsing System using Google Document AI and BigQuery
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Cover image for Real Estate Investing Dashboard
Real Estate Investing Dashboard
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30
Cover image for Google Sheets Report Automation
Google Sheets Report Automation
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20
Data Engineer(2)
Dominic Plaza's avatar
Dominic Plaza
Barcelona, Spain
I build to understand. I design to feel.
New to Contra
I build to understand. I design to feel.
Cover image for Hublot Digital Boutique
Hublot Digital Boutique
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2
Cover image for Random
Random
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1
Cover image for Design & Exploration
Design & Exploration
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2
Cover image for Calibration
Calibration
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1
Data Engineer(1)
Gonzalo Franco's avatar
Gonzalo Franco
Spain
Software Engineer: Building Awesome Webs Apps & Products
Software Engineer: Building Awesome Webs Apps & Products
Cover image for Lead Engineer, eth-roulette.com
Lead Engineer, eth-roulette.com
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9
Cover image for CTO, OpenBroker.com
CTO, OpenBroker.com
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Cover image for CTO, Subletny.com
CTO, Subletny.com
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28
Cover image for Product Manager, Full-stack Engineer, CleanHero
Product Manager, Full-stack Engineer, CleanHero
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19
Data Engineer(1)