Senior Data Engineer

The Role

You'll build Refractal's data foundation, including the evidence store that customers' auditors rely on, the analytics behind compliance reporting and the datasets our models are trained on.

What you'll do

• Design the data model for our append-only, cryptographically signed evidence store.
• Build the streaming and batch layer that turns ingested activity and detections into queryable data.
• Own data quality, retention, residency and deletion controls for regulated customers.
• Build training and evaluation datasets with our data scientists and security researchers.
• Make compliance reporting against the EU AI Act, NIST AI RMF and ISO/IEC 42001 quick to produce from our data.

Success in your first six months

• The evidence store is in production, documented and trusted by customers' auditors.
• Colleagues answer compliance and detection questions from data you own, without ad hoc work.
• Training and evaluation data has clear provenance and separation.

What we're looking for

• 6+ years in data engineering, owning production pipelines.
• Strong Python and SQL, with Postgres plus a warehouse or analytics store such as BigQuery or ClickHouse.
• Experience with streaming (Kafka, Pub/Sub or similar) and orchestration (Airflow, Dagster or similar).
• Data modelling for audit trails, lineage and multi-tenant isolation.
• Security-minded handling of sensitive data.

Nice to have

• Google Cloud experience, or data work in regulated industries.
• Montenegrin, Serbian, Bosnian or Croatian.

What we offer

• Salary: €35,000–€80,000 gross per year
• Competitive equity to share in Refractal's growth
• Pension contribution
• Private medical and dental cover
• Visa and relocation support

How to apply

Complete the application form with your CV and tell us about a production data pipeline you owned end to end.