Sam Ansmink
Engineering Manager at DuckDB
Amsterdam, North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolSam Ansmink is an engineering manager and long-time contributor to DuckDB, with 11 years of experience building databases, cloud integrations, and backend systems from Amsterdam. At DuckDB Labs he’s focused on cloud storage integrations (S3, GCS, Azure), lake table formats (Iceberg, Delta) and the extension framework, while also contributing core database fixes and CI robustness to the flagship duckdb/duckdb and duckdb-wasm projects. He combines research experience from CWI with hands-on product and startup roles (including CTO at Kinder), giving him a rare blend of academic grounding and pragmatic engineering leadership. Sam is comfortable across the stack—having implemented WebAssembly features and nuanced type casts—and enjoys digging into core systems as much as shaping team direction. Colleagues know him for shipping resilient database features and for the small cultural touch of rewarding observant visitors who spot the DuckDB sticker on his profile.
11 years of coding experience
8 years of employment as a software developer
Gymnasium Natuur en Techniek, Gymnasium Natuur en Techniek at Montessori Lyceum AmsterdamMaster of Science - MS Computer Science, Master of Science - MS Computer Science at University of Amsterdam
Stackoverflow
81reputation
847reached
2answers
0questions
Github Skills (22)
javascript10
c-language10
databases10
typescript10
computer-engineering10
sql10
typescript-types10
webassembly10
typescripts10
cprogramming-language10
relational-databases10
sql-database10
database10
apache-arrow9
nodes8
Programming languages (12)
Github contributions (5)
duckdb/duckdb
Nov 2021 - Jan 2023
DuckDB is an analytical in-process SQL database management system
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:330 reviews, 721 commits, 209 PRs in 1 year 2 months
Contributions summary:Sam primarily focused on database-related tasks, contributing to the "duckdb/duckdb" repository, which is an analytical in-process SQL database management system. They were involved in modifying and adding new features within the core components, like creating and managing secrets. The user also worked on tasks to improve the robustness of the software, and made fixes for issues that arose within the continuous integration of the project.
management-systemanalyticsduckdbmysqlembedded-database
duckdb/duckdb-wasm
Dec 2021 - Feb 2022
WebAssembly version of DuckDB
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:5 reviews, 20 commits, 7 PRs in 1 month
Contributions summary:Sam primarily focused on enhancing the DuckDB-WASM project by implementing new features and improving the codebase. Their contributions include adding a `cast_duration_to_time64` option, which required changes to the `arrow_casts.cc`, `config.cc`, and `config.h` files, as well as associated test cases. They also added test cases related to decimal types and all_types tests. In addition, the user made several style-related code formatting changes.
analyticsduckdbbrowserrustjavascript
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