Data engineer for customer loyalty apps

From Q-tech, we are collaborating with a large European technology company, part of a leading international retail and distribution group, that is looking for a Data Engineer to join a highly innovative squad within the Marketing & Communication domain. You'll work on one of the company's most strategic products: one of the largest customer loyalty apps in Europe, with over 130 million users, managing massive-scale customer and transactional data to power advanced segmentation, personalized campaigns and data-driven decisions across countries.

• Design, develop and maintain scalable batch and real-time data pipelines.
• Build and optimize data solutions for very large volumes of customer and transaction data.
• Develop and maintain the Marketing Data Layer used by marketers across countries.
• Transform analytical data into operational datasets for segmentation and campaign execution.
• Ensure data quality, performance, governance and reliability.
• Collaborate with Data Engineers, Software Engineers, Product Owners and business stakeholders; support other squads as needed.
• Contribute to AI-powered marketing products, advanced analytics, and ML solutions where relevant.
• Identify actionable insights from customer behavior and purchasing patterns.

• Strong experience as a Data Engineer with large-scale datasets.
• Advanced Python and SQL.
• Experience with Databricks and Airflow
• Big Data frameworks: Spark, Kafka, Kubernetes, Hive.
• Relational (e.g., SQL Server) and non-relational databases (e.g., MongoDB, ELK, Cassandra).
• Experience designing robust, scalable data pipelines; knowledge of modern data architectures and data operations.
• Agile experience; strong problem-solving mindset and autonomy.
• Fluent English (minimum B2).
• Будет плюсом: ML tools: Scikit-Learn, Pandas, Spark ML, MLflow; Data Science workflow knowledge; experience with AI-related initiatives; Retail/customer-centric business experience; marketing analytics, segmentation or CRM data experience; Experience with customer/transaction/behavioral data at scale; Infrastructure deployment / DevOps knowledge; .NET experience

• Salary: €56,000 – €61,000 base
• Flexible benefits package (~€3,700 net/year)
• Private health insurance
• Remote work allowance (1-2 days office/week)
• Wellbeing benefits