Data Engineer

• 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

Your Tech Stack

• BigQuery
• SQL
• Python
• Airflow
• Splink
• Google Cloud Storage
• Cloud Run Jobs
• Pub/Sub, * 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

• 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., * 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 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.