DuckDB Labs is the company behind DuckDB — the embedded analytical database that runs in-process, across SQL, Python, R, and the browser. Spun out from CWI Amsterdam research. MotherDuck is the affiliated cloud product. The interview emphasizes deep database systems engineering, vectorized execution, and the unique elegance of an embedded analytical engine.
Process
Recruiter screen → 60-minute coding (C++ for engine, Python for tools) → onsite virtual: 2 coding, 1 system design, 1 craft deep-dive, 1 behavioral. Cycle: 4–6 weeks; very high technical bar.
What they actually ask
- Design a vectorized columnar execution engine
- Design an embeddable database that has zero external dependencies
- Design WebAssembly compilation of an analytical engine for browser execution
- Coding: medium-hard DSA, often C++ systems-flavored
- Behavioral: ownership, deep technical taste, OSS-and-research culture
Levels and comp (2026)
- SE: €110K–€160K (Netherlands base) plus equity; US offers $185K–$245K total
- Senior SE: €160K–€220K NL; $260K–$355K US
- Staff: €220K–€320K NL; $365K–$485K US
Prep priorities
- Be fluent in C++ (the engine) and SQL deeply
- Understand vectorized execution, query optimization, and modern columnar engines (Velox, Apache Arrow)
- Brush up on WebAssembly, embeddable database design, and Apache Parquet
Frequently Asked Questions
Is DuckDB Labs remote-friendly?
Hubs in Amsterdam (HQ) and remote across EU. Some senior+ remote within US.
How does DuckDB compare to ClickHouse, SQLite, or PostgreSQL?
SQLite is OLTP-focused embedded. ClickHouse is server-based columnar. PostgreSQL is general-purpose OLTP. DuckDB is OLAP-focused embedded — runs in-process for analytical workloads. Strong fit for data-engineering, notebooks, and edge analytics. Comp lower than US-only AI labs but with strong research and OSS brand.
What is the engineering culture?
Research-engineering blended (CWI heritage); calm, technically deep. Strong OSS contributor ethos.