Senior Data Engineer

Hack The Box is hiring a Senior Data Engineer to build and operate the pipelines behind its analytics and ML products. The role covers batch and streaming ingestion, transformation, data quality, orchestration, and serving data for analytics, model training, and online inference. The team is modernising its GCP stack and migrating from Snowflake to BigQuery, Bigtable, Pub/Sub, and Dataflow.

You’ll own systems end to end, work with ML engineers on feature pipelines and model monitoring, and partner with teams across infrastructure, software engineering, and product. The core stack includes Python, SQL, BigQuery, Dataflow, Kafka, Pub/Sub, Airflow, ClickHouse, and dbt. The position can be fully remote across Europe, or based at the Athens hub under a hybrid arrangement. Relocation support is available for candidates moving to Greece.

Highlights

• Build batch and streaming pipelines on GCP.
• Help lead the migration from Snowflake to a GCP-native stack.
• Develop data products and feature pipelines for analytics and ML.
• Europe-wide remote work or a hybrid option at the Athens hub.