GCP Data Engineer - Customer Value and Digital Engagement Department

T-Mobile is recruiting for the Customer Value and Digital Engagement Department in Warsaw, focusing on data transformation programs using Google Cloud Platform. The role involves working with advanced data technologies to support analytics, business processes, machine learning models, AI applications, and data-driven solutions in telecommunications.

• Minimum 2–3 years experience as a Data Engineer (Senior: min. 5 years plus leadership experience).
• Practical experience with GCP, especially BigQuery (advanced SQL, optimization, cost management), Cloud Storage, Pub/Sub, Dataflow (Apache Beam), or Dataproc (Spark), and Cloud Composer (Airflow) for pipeline orchestration.
• Basic knowledge of GCP security (IAM, KMS, DLP).
• Very good knowledge of SQL (query optimization, aggregations, large dataset handling).
• Experience programming in Python (e.g., pandas, PySpark, automated tests).
• Ability to design data models (Kimball, Data Vault, Dimensional Modeling) and build data layers (raw/bronze, curated/silver, semantic/gold).
• Familiarity with automation tools: Terraform (IaC) and CI/CD (e.g., GitLab CI, Cloud Build).
• Experience ensuring data quality (testing, monitoring, alerting).
• Ability to work with monitoring and diagnostic tools (Cloud Monitoring, Logging).
• Experience creating technical documentation and participating in code review.

Nice to have:

• Google certifications (e.g., Google Professional Data Engineer, Associate Cloud Engineer).
• Experience with data management tools like dbt, Dataform (data transformation and documentation), Dataplex, Data Catalog (data governance).
• Teamwork and communication skills with business, technical, and analytical teams.
• Proactivity, responsibility, and quality orientation in data.
• English proficiency at minimum B2 level.

• Designing, developing, and maintaining ETL/ELT data pipelines on GCP.
• Integrating data from various sources (APIs, databases, files) into tools like BigQuery and Cloud Storage.
• Designing and optimizing data models using Kimball, Data Vault, and Dimensional Modeling techniques.
• Implementing streaming solutions using Pub/Sub, Dataflow, and Apache Beam.
• Automating data processes using Cloud Composer (Airflow).
• Ensuring data performance, quality, security, and scalability.
• Collaborating with analytics, Data Science, and business teams.
• Creating technical documentation and participating in code review.
• Monitoring and resolving performance issues and optimizing cloud costs.
• For Senior roles: leading a micro-team (2–4 people), planning sprints, backlog prioritization, facilitating business workshops, translating requirements into solutions and SLA/SLO.

The administrator of your personal data is T-Mobile Polska S.A. with headquarters in Warsaw, ul. Marynarska 12. You have rights to access, correct, delete, or restrict your data processing, object to processing, data portability, and file complaints to supervisory authorities. Data is processed for recruitment purposes, mandatory data is required per labor law, optional data is voluntary. Data processing periods cover recruitment and potential claims periods. Consent for future recruitments can be withdrawn anytime.