Acerca de Gerardo
I design and build data platforms and backend services that companies rely on for critical business decisions.
With 4+ years of experience across energy trading, e-commerce, healthcare, and aviation, I specialize in:
→ Data pipeline design & optimization (dbt, SQLMesh, Airflow, Spark)
→ Backend API development (FastAPI, PostgreSQL, Python)
→ Cloud-native data platforms (GCP, AWS, Azure, Kubernetes)
→ Data quality frameworks & DataOps implementation
→ Technical audits and architecture reviews
Currently a Data Engineer at Axpo (European energy markets), previously at Thoughtworks — where I delivered data platforms for a top global airline, a major UK healthcare provider, and Europe's leading e-commerce company.
Certified Google Cloud Professional Data Engineer. MSc in Big Data & Analytics.
I take on freelance projects evenings and weekends: MVP builds, API development, pipeline optimization, data platform audits, and analytics setups. I scope clearly, communicate proactively, and deliver on time.
Available for remote work across Spain and Europe. Fluent in English and Spanish, intermediate Italian.
Español
Bilingüe o nativo
Inglés
Competencia profesional completa
Italiano
Competencia profesional básica
Solo teletrabajo
Lleva a cabo sus proyectos principalmente en remoto
Experiencia
- AxpoData EngineerENERGÍAdiciembre de 2025 - Hoy (6 meses)Madrid, EspañaMaintain and evolve a Kubernetes-based data platform supporting critical business processes within the Asset Optimization & Logistics division for EU energy markets. Build backend and data platform components using Python, FastAPI, PostgreSQL, and Airflow. Collaborate on the design of an end-to-end data lineage solution enabling row-level traceability for debugging, auditing, and data quality investigations.
- ThoughtworksData Engineermarzo de 2022 - diciembre de 2025 (3 años y 9 meses)Madrid, EspañaDelivered data platforms for three enterprise clients across aviation, healthcare, and e-commerce:- Global airline (UK): Modernized data serving platform with SQLMesh, Snowflake, and AWS Glue. Designed Terraform-based deployment kits. Built SCD models and data quality audits at scale.- Major healthcare provider (UK): Architected a scalable data platform PoC on Microsoft Fabric with PySpark, Delta, and PowerBI. Implemented Great Expectations for data quality. Designed enterprise-scale medallion architecture roadmap.- Europe's leading e-commerce (Germany): Built a data platform from scratch serving MicroStrategy dashboards. Designed ELT pipelines on Kubernetes. Implemented PyDeequ data quality checks with Grafana alerting.
- TelefonicaJunior Backend DeveloperTELECOMUNICACIONESseptiembre de 2021 - febrero de 2022 (5 meses)Madrid, EspañaDeveloped TV Open Platform components as containerized microservices. Built a Dockerized Kafka consumer service integrated with SQL Server and CI/CD via Jenkins. Integrated Prometheus metrics with Grafana dashboards for real-time service monitoring.
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Formación
- Professional Data Engineer CertificationGoogle Cloud Platform2024Professional Data Engineer Certification
- Master in Big Data and AnalyticsUniversidad Europea2022Master in Big Data and Analytics