Requirements: English
Company: Link Group
Region: Krakw , Lesser Poland Voivodeship
Big Data Engineer Full-time | AdTech Platform | Python/Java/Scala Were looking for an experienced Big Data Engineer to join our high-impact team building the backbone of a global advertising platform delivering personalized content to millions of media-enabled devices. Your work will directly influence data-driven decision making, real-time targeting, and analytics pipelines for one of the most advanced AdTech ecosystems in the industry. What Youll Be Doing Build and maintain robust, scalable data pipelines to support attribution, targeting, and analytics Collaborate closely with Data Scientists, Engineers, and Product Managers Design and implement efficient storage and retrieval layers for massive datasets Optimize data infrastructure and streaming processing systems (e.G. Flink, Apache Ignite) Drive quality through unit tests, integration tests, and code reviews Develop and maintain Airflow DAGs and other orchestration pipelines Translate business needs into robust, technical data solutions Lead or support A/B testing and data-driven model validation Contribute to RD initiatives around cloud services and architecture What You Bring 5+ years of experience in backend/data engineering using Python, Java, or Scala Strong experience with Big Data frameworks (Hadoop, Spark, MapReduce) Solid knowledge of SQL/NoSQL technologies (e.G. Snowflake, PostgreSQL, DynamoDB) Hands-on with Kubernetes, Airflow, and AWS (or similar cloud platforms) Stream processing experience: Flink, Ignite Experience with large-scale dataset processing and performance optimization Familiarity with modern software practices: Git, CI/CD, clean code, Design Patterns Fluent in English (B2+) Degree in Computer Science, Telecommunications, or related technical field Bonus Points Experience with GoLang or GraphQL Hands-on with microservices or serverless solutions Experience in container technologies (Docker, Kubernetes) Previous work in AdTech, streaming media, or real-time data systems