Data Engineer for AI-Ready, Billion-Row OSINT Data

Stealth Startup; Amsterdam; On-site; EUR 70,000 - 110,000; Full time

Job summary

Stealth Startup in the Netherlands is seeking a Data Engineer to own the path from raw OSINT data to the representations our AI agents reason over. You will ingest and transform data at billion-row scale and build provenance-aware structures.

You’ll work with Python, PySpark, Iceberg, ClickHouse and OpenSearch, collaborating with AI engineers and end users. Experience with large-scale, text-heavy and imperfect datasets is valued; comfort with ambiguity and an AI-native mindset is essential.

Qualifications

• Experience building data pipelines at scale (billions of rows).
• Strong Python and SQL skills.
• Knowledge of data modeling and provenance.
• Experience with OSINT or text-heavy datasets is a plus.

Responsibilities

• Ingest and transform raw data into analyzable representations.
• Build graph/temporal/provenance-aware data structures.
• Ensure data quality and traceability from source to derived facts.
• Collaborate with AI engineers and end users to ship infrastructure.

Skills

Python

PySpark

Big data

Tools

Iceberg

ClickHouse

OpenSearch

Job description

Stealth Startup in the Netherlands is seeking a Data Engineer to own the path from raw OSINT data to the representations our AI agents reason over. You will ingest and transform data at billion-row scale and build provenance-aware structures.

You’ll work with Python, PySpark, Iceberg, ClickHouse and OpenSearch, collaborating with AI engineers and end users. Experience with large-scale, text-heavy and imperfect datasets is valued; comfort with ambiguity and an AI-native mindset is essential.