Senior Data Engineer

Hack The Box is hiring a Senior Data Engineer to own and evolve its data pipelines on Google Cloud. The role sits in the Data, Analytics and AI team and centres on building batch and streaming pipelines, hardening existing ones, and making clean, trustworthy data available across the organisation. You will work end to end, from CDC and event ingestion through transformation, serving, and the feature layer that powers ML and AI products.

Day to day, you will design ELT and ETL processes on BigQuery and ClickHouse, build real-time pipelines on Pub/Sub and Kafka with Dataflow, orchestrate workflows in Airflow, and model data for analytics, ML training, and online inference. You will also partner with ML engineers on feature pipelines, drift monitoring, and retraining, while helping drive a migration off Snowflake.

Highlights

• Fully remote across Europe, or hybrid from the Athens hub with relocation support
• GCP-native stack: BigQuery, Bigtable, Pub/Sub, Dataflow, ClickHouse, Airflow
• Strong ML and AI exposure through feature pipelines and online inference
• Benefits include private health care, 25 days leave, and a training budget