Weare amulti-award-winning team ofover 100engineers, designers, and analysts based inLeicester, with development hubs inUkraine and Spain. Wespecialise inbespoke software development, extended teams/staff augmentation, and support asaservice.OUR CLIENTOur partner isEurope’s leading platform for buying and selling books, CDs, movies, games, and fashion. The company fosters success bybringing together ateam ofprofessionals with diverse backgrounds who collaborate tobring bold ideas tolife and find innovative solutions.Weare looking for a Data Engineer tojoin the Evolved Ideas team.As Senior Data Engineer, you will own one ofour most business-critical data assets: the system that links customer identities across our businesses and powers better decisions inmarketing, CRM, reporting, and analytics. You will join our Business Intelligence &Data; Engineering team and work closely with Data Engineers and Business Analysts tobuild reliable, scalable,



and trustworthy customer identity data.Your missionOwn the end-to-end pipeline that creates the unified customer_uuid across Books &Media; and FashionMaintain and evolve our customer identity master data with astrong focus onaccuracy, reliability, and production qualityImprove our probabilistic identity resolution model and make matching decisions measurable, transparent, and explainableBuild scalable and cost-efficient data pipelines across BigQuery, GCS, and Cloud Run JobsIntroduce diagnostics, monitoring, and structured validation for every relevant model changeIdentify and resolve edge cases incustomer matching logic before they become production issuesWork closely with business and technical stakeholders toturn complex matching challenges into robust data solutionsOur Tech StackBigQuerySQLPythonAirflowSplinkGoogle Cloud StorageCloud Run JobsPub/SubMust-Have5+years ofexperience inproduction data engineeringStrong experience with BigQuery and advanced SQL inlarge-scale analytical environmentsStrong Python skills for production

📌 Senior Data Engineer (Madrid)
🏢 Evolved Ideas Spain (formerly Secret Source)
📍 Madrid