Senior Data Engineer – Rewards Platform and Data Analysis

DSK Bank is launching a bank-wide rewards program , and we are building its engine from scratch. As a Senior Data Engineer, you will own the data flows that turn customer activities into cashback, challenge progress and loyalty points. This is a greenfield build: you will shape the architecture, not just maintain it.

What you'll do

Build the real-time core

• Design, build and run real-time Python pipelines that consume events from Kafka and apply campaign rules: customer eligibility, reward caps and frequency limits.
• Own the progress store and points ledger in PostgreSQL, the CDC streams around them, and the second stage that grants rewards and sends notifications to DSK Mobile.
• Make every reward correct by design: idempotent processing, full traceability back to the transaction that earned it, and clean handling of reversals and refunds.

Keep the numbers right

• Build the reconciliation process against our golden source, the transaction tables in DWH / Databricks
• Develop batch processes in Databricks, dbt and Apache Airflow: daily customer eligibility, aggregates and history.
• Monitor latency, errors and lost events, set up alerting and resolve incidents.

Make campaigns fast to launch

• Turn new campaigns into configuration and grow a library of reward mechanics – capped cashback, monthly challenges, boosted partner cashback – so the program team can launch without new code.
• Plug new data sources into the engine and maintain the engagement and reward catalogs.

Power the business

• Prepare data models and logs for Power BI reporting, campaign performance analysis, complaint handling, and partner invoicing and commissions.
• Write tests and technical documentation for every pipeline and configuration.
• Help shape the rewards platform architecture and technology choices.

What you bring

• 3+ years as a Data Engineer or data pipeline developer.
• Production-grade Python.
• Advanced SQL and hands-on PostgreSQL.
• Git and CI/CD as part of your daily workflow.
• A university degree in Computer Science, Informatics, Mathematics, Engineering or a related field.
• Good English, written and spoken.
• Ownership and initiative: you are comfortable in a new team where not everything is defined yet.

Nice to have

• Apache Kafka or other event streaming.
• Databricks / Apache Spark.
• dbt and Apache Airflow.
• Power BI.
• Experience in banking, fintech or loyalty programs.

What we offer

• A greenfield build. Design a real-time rewards engine, with a real say in architecture and technology choices.
• Visible impact. Your pipelines decide what customers see in DSK Mobile seconds after they pay.
• A modern data stack. Python, Kafka, PostgreSQL, Databricks, dbt, Airflow and Power BI.
• Additional Health Insurance
• 20+5 paid annual holiday leave
• Food vouchers in the amount of up to 102.26 EUR per month
• Favorable conditions for housing and mortgage lending, as well as for DSK Bank products and services
• Preferential conditions for Multisport / CoolFit card
• Discounts in more than 20 companies

If you are challenged by this opportunity, we would be glad to review your application.

Only short-listed candidates will be contacted. All applications will be treated in strict confidentiality.