About the Position

Our Team is our most important asset

Senior Data Engineer

We are a multi-award-winning team of over 100 engineers, designers, and analysts based in Leicester, with development hubs in Ukraine and Spain. We specialise in bespoke software development, extended teams/staff augmentation, and support as a service.

Our partner is Europe’s leading platform for buying and selling books, CDs, movies, games, and fashion. The company fosters success by bringing together a team of professionals with diverse backgrounds who collaborate to bring bold ideas to life and find innovative solutions.

We are looking for a Senior Data Engineer to join the Evolved Ideas team.

As Senior Data Engineer, you will own one of our most business-critical data assets: the system that links customer identities across our businesses and powers better decisions in marketing, CRM, reporting, and analytics. You will join our Business Intelligence & Data Engineering team and work closely with Data Engineers and Business Analysts to build reliable, scalable, and trustworthy customer identity data.

Responsibilities

• 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 a strong focus on accuracy, 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 in customer matching logic before they become production issues
• Work closely with business and technical stakeholders to turn complex matching challenges into robust data solutions

Requirements

Must-Have:

• 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
• A careful, structured, and ownership-driven way of working
• Strong communication skills and the ability to explain 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 and SS.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 in GCP
• Experience with Pub/Sub as a source in data pipelines
• Familiarity with data format trade-offs such as Parquet, Avro
• Experience with dbt
• Exposure to downstream BI use cases
• Experience in e-commerce or marketplace environments

We Offer

• Contributing to a high scale, complex product and seeing the real-time impact of your work
• Flexible and hybrid working
• Private Medical Healthcare insurance
• Training budget
• Extra holidays
• Challenging tasks and professional development, knowledge & best practice sharing

About the Company

We are a multi-award-winning team of over 100 engineers, designers, and analysts based in Leicester, with development hubs in Ukraine and Spain. We specialise in bespoke software development, extended teams/staff augmentation, and support as a service.