Senior Data Engineer – Identity Data & Analytics (Remote in Spain)

Evolved Ideas Spain (formerly Secret Source); España; Remote; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Flexible and hybrid working

Private medical insurance

Training budget

Extra holidays

Job summary

Evolved Ideas Spain (formerly Secret Source) is seeking a Senior Data Engineer to own one of our most business-critical data assets: the system that links customer identities across Books & Fashion and powers marketing, CRM, and analytics.

Based in Spain with remote-friendly policies, you will join the BI & Data Engineering team and build reliable, scalable data pipelines using BigQuery, Python, Airflow, and Splink while ensuring data quality and explainability.

Qualifications

• 5+ years of experience in production data engineering.
• Strong experience with BigQuery and advanced SQL in large-scale analytical environments.
• Strong Python skills for production-grade data engineering.
• Solid Airflow experience and a strong understanding of reliable orchestration patterns.
• Hands-on experience with incremental pipelines and idempotent data processing.
• Experience with probabilistic record linkage or entity resolution in production.
• Strong understanding of data quality, matching logic, and precision/recall trade-offs.
• Careful, structured, and ownership-driven way of working.
• Strong communication skills and the ability to explain technical decisions clearly.
• English level: B2 for independent communication with native speakers.

Responsibilities

• Own the end-to-end pipeline that creates the unified customer_identity across Books/Media and Fashion.
• Maintain and evolve the customer identity master data with a focus on accuracy and production quality.
• Improve probabilistic identity resolution model and make matching decisions transparent and explainable.
• Build scalable data pipelines across BigQuery, GCS, and Cloud Run Jobs.
• Introduce diagnostics, monitoring, and validation for model changes.
• Identify and resolve edge cases in customer matching logic before production issues.
• Collaborate with business and technical stakeholders to turn complex matching challenges into robust data solutions.

Skills

5+ years production data engineering

Communication skills

English level B2

Tools

BigQuery

SQL

Python

Airflow

Splink

Google Cloud Storage

Cloud Run Jobs

Pub/Sub

Job description

Evolved Ideas Spain (formerly Secret Source) is seeking a Senior Data Engineer to own one of our most business-critical data assets: the system that links customer identities across Books & Fashion and powers marketing, CRM, and analytics.

Based in Spain with remote-friendly policies, you will join the BI & Data Engineering team and build reliable, scalable data pipelines using BigQuery, Python, Airflow, and Splink while ensuring data quality and explainability.