About 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.
Spanish
Native or bilingual
English
Fluent
Italian
Conversational
Remote only
Primarily works remotely
Experience
- AxpoData EngineerENERGY AND UTILITIESDecember 2025 - Today (7 months)Madrid, SpainMaintain 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 EngineerMarch 2022 - December 2025 (3 years and 9 months)Madrid, SpainDelivered 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 DeveloperTELECOMMUNICATIONSSeptember 2021 - February 2022 (5 months)Madrid, SpainDeveloped 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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Education
- Professional Data Engineer CertificationGoogle Cloud Platform2024Professional Data Engineer Certification
- Master in Big Data and AnalyticsUniversidad Europea2022Master in Big Data and Analytics