Senior Data Engineer

• Become an essential part of AI Services team focused on building and operating ML applications for customers across DT group.
• Proactively identify opportunities to improve our data infrastructure and processes, proposing and implementing innovative solutions.
• Develop and maintain our data processing and ETL pipelines.
• Design, maintain and update data models.
• Integrate data from various internal and external sources.
• Build and maintain scalable, efficient, and robust data infrastructure solutions for our ML products.
• Collaborate with data scientists and front-end developers in creating curated and production ready datasets for training our models and building visualization tools.
• Work on improving data quality and implementing automated data quality monitoring solutions.
• Contribute to development and adoption of best data engineering practices.
• Stay up to date with recent data engineering technologies and developments.
• Collaborate with engineers from other teams and make decisions about the future of our technical stack and infrastructure.
• Write clean, production ready, well-documented and tested code.

• Bachelor or Master of Science in Computer Science or similar fields
• 5+ years of experience as a data engineer or a Python software developer with focus on data-heavy tasks
• Fluent in English (German / Czech / Slovak is a plus)
• Advanced SQL knowledge
• Advanced database systems knowledge (SQL, NoSQL, database optimization techniques)
• Advanced Python knowledge (OOP, design patterns, testing, good coding practices and popular data processing libraries)
• Working experience with data modeling
• Working experience with ETL/ELT processes and development of data pipelines
• Experience with using and/or building APIs and integrating data from various sources.
• Knowledge of orchestration tools such as Dagster or Airflow
• Knowledge of cloud data solutions (preferably GCP, but AWS or Azure are also fine)
• Working knowledge of git (we use Gitlab)
• Strong analytical skills, ability to understand complex data structures and produce efficient data solutions.
• Independence and resilience when facing obstacles.
• Good communications skills, positive attitude towards working in an international environment.

• Experience with agile work (Scrum)
• Working knowledge of Gitlab CI/CD
• Working knowledge of Docker and/or Kubernetes
• Experience with modern data warehouses (BigQuery, Snowflake)
• Experience with data engineering tools such as Databricks, Spark or Kafka
• Experience developing machine learning applications

We want you to know that we value our employees and want to provide you with more than just a job. As a valued member of our team, you will receive a range of benefits that include:

• An annual financial bonus
• An extra week of holiday (25 days/year), Up to 5 My days, and 1 day off for volunteering
• Additional paid time offs for married couples/registered partnerships, parents on the first day of school, extended paternity leave, and time-offs for foreigners dealing with state office matters
• Flexible working hours and the possibility to work remotely
• Pension plan contribution
• Free refreshments (water, coffee, tea, milk, and fruits available in the office)
• Company Shares
• Alza Discounts
• Company mobile phone and laptop
• Meal vouchers in the amount of 160 CZK per working day
• A variety of Benefits (Cafeteria Plan, Multisport Card, Makro Card)
• A family program with T-Mobile (discounts for employee’s family members and friends)
• Training and qualification opportunities (access to the internal learning HUB)
• Personal development opportunities (career path, job rotation, Bring your own Project)
• Involvement in various activities supporting charity organizations (Flea markets, volunteering days, food collections)
• A relocation package for candidates coming from abroad
• Opportunities for relaxation and wellness activities (massage chair, PlayStation 5, etc.)
• Fun team events such as brunches, Health Day, and summer and holiday parties!
• At our company, we believe in creating a positive work environment that values our employees' well-being and development. If you are excited about this opportunity and want to be part of a dynamic team that cares about its employees, send us your CV in English and join us today!
• As a part of Deutsche Telekom Group, we ensure not only work-life balance and international career opportunities but also personal development opportunities. We support all individuals in their performance, development, and growth. We offer a variety of trainings, qualifications, and e-learning activities to actively support the rising of common expertise.
• At Deutsche Telekom Services Europe Czech Republic, we are proud to be an equal opportunity workplace and employer. We review applications for employment without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, ancestry, citizenship, age, uniformed services, genetic information, physical or mental disability, medical condition, marital status, or any other basis prohibited by law. We welcome applicants from all backgrounds and strive to create a workplace that is supportive, empowering, and inclusive.