Jeff Raymakers
Software Engineer at MotherDuck
Seattle, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolJeff Raymakers is a seasoned software engineer based in Seattle with 13 years of experience building user-facing interfaces and backend systems for analytics and data products. He has held senior technical roles at MotherDuck, Snowflake, and Tableau, combining hands-on implementation with architecture and team leadership. Jeff contributes to prominent open-source projects like DuckDB, where he added C API features and timestamp handling improvements—underscoring his comfort at the intersection of databases and systems programming. Trained at Stanford in CS and EE, he brings a strong foundation in both software and hardware-oriented thinking to product-focused engineering. Colleagues describe him as a pragmatic builder who translates complex data problems into intuitive UIs and reliable backend services.
13 years of coding experience
18 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Stanford University
Github Skills (10)
c1710
databases10
capi10
embedded-database10
c1110
sql10
database10
testing9
nodejs8
analytics8
Programming languages (6)
Github contributions (5)
duckdb/duckdb
Sep 2023 - Jan 2026
DuckDB is an analytical in-process SQL database management system
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:14 reviews, 13 PRs, 68 comments in 2 years 4 months
Contributions summary:Jeff contributed to the DuckDB database system by implementing C API features related to timestamp handling, including new data types (TIMESTAMP_S, TIMESTAMP_MS, TIMESTAMP_NS) and associated functions. They also addressed a floating-point error in a NodeJS test, indicating involvement in the testing of the database. Furthermore, the user added a duckdb_append_value function to the C API, expanding its capabilities.
duckdbsql-databasesqldatabaseolap
jraymakers/geometry-proof-game
Apr 2020 - Mar 2026
Contributions:14 PRs, 32 pushes, 2 branches in 6 years
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