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 CLIENT Our 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 mission

Own the end-to-end pipeline that creates the unified customer_uuid across Books &Media; and Fashion

Maintain and evolve our customer identity master data with astrong focus onaccuracy, reliability, and production quality

Improve our probabilistic identity resolution model and make matching decisions measurable, transparent, and explainable

Build scalable and cost-efficient data pipelines across BigQuery, GCS, and Cloud Run Jobs

Introduce diagnostics, monitoring, and structured validation for every relevant model change

Identify and resolve edge cases incustomer matching logic before they become production issues

Work closely with business and technical stakeholders toturn complex matching challenges into robust data solutions

Our Tech Stack

BigQuery

SQL

Python

Airflow

Splink

Google Cloud Storage





Cloud Run Jobs

Pub/Sub

Must-Have

5+years ofexperience inproduction data engineering

Strong experience with BigQuery and advanced SQL inlarge-scale analytical environments

Strong Python skills for production-grade data engineering

Solid Airflow experience and astrong understanding ofreliable orchestration patterns

Hands-on experience with incremental pipelines and idempotent data processing

Experience with probabilistic record linkage orentity resolution inproduction

Strong understanding ofdata quality, matching logic, and precision/recall trade-offs

Acareful, structured, and ownership-driven way ofworking

Strong communication skills and the ability toexplain technical decisions clearly

English Level required:

B2 - Independent users of the language, i.e. those who have the necessary fluency to communicate without effort with native speakers.

We are based in the Canary Islands, Spain. To apply for this vacancy you must have the right to work in Spain (NIE andSS.SS.) The role can only be performed remotely within Spain. We are unable to hire candidates who require relocation or visa support.

Nice-To-Have

Experience with Splink and probabilistic record linkage tools

Experience with Cloud Run Jobs, GCS, and event-driven patterns inGCP

Experience with Pub/Sub asasource indata pipelines

Familiarity with data format trade-offs such asParquet, Avro

Experience with dbt

Exposure todownstreamBI use cases

Experience ine-commerce ormarketplace environments

YOU CAN LOOK FORWARD TO

Contributing toahigh scale, complex product and seeing the real-time impact ofyour work

Adaptable and hybridworking

Private MedicalHealthcare insurance

Training budget

Extra holidays

Challenging tasks and professional development, knowledge &best; practice sharing

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