Benjamin Egelund-müller

Platform Lead

Copenhagen, Capital Region of Denmark

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Summary

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Rockstar

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Top School

Benjamin Egelund-müller is a Platform Lead based in Copenhagen with 11 years of experience building backend systems, data platforms, and developer tooling. He co-founded Beneath Systems and now leads platform engineering at Rill Data, where he focuses on runtime services and BI-as-code products that turn SQL into production dashboards. His open-source contributions include deep work on rilldata/rill and the go-duckdb driver, improving gRPC/HTTP runtimes, query dry-runs, and broad DuckDB type support (including hugeint handling via math/big.Int). Trained at Imperial College London and Københavns Universitet with top honors, he brings a strong academic foundation to pragmatic system design. Colleagues describe him as a hands-on leader who bridges data engineering, databases, and reliable backend architecture while still shipping low-level fixes himself. An interesting detail: he blends startup founder experience with core database-driver contributions, giving him rare insight into both product and plumbing of modern analytics stacks.

11 years of coding experience

9 years of employment as a software developer

Computer Science, First-class honours, Dean's list, Computer Science, First-class honours, Dean's list at Imperial College London

BSc, Computer Science, 12.0 / 12.0, BSc, Computer Science, 12.0 / 12.0 at Københavns Universitet

Danish, English

Github Skills (20)

back-end-development10

duckdb10

go10

database-driver10

sql10

grpc10

api-design9

restful-api9

datatypes9

api-rest9

birt9

c119

c179

powerbi9

data-analysis9

Programming languages (11)

TypeScriptDockerfileJavaC++CSSRustCJavaScript

Github contributions (5)

rilldata/rill

Aug 2022 - Jan 2023

Rill is a tool for effortlessly transforming data sets into powerful, opinionated dashboards using SQL. BI-as-code.

Role in this project:

Back-end Developer

Contributions:2986 reviews, 82 commits, 1609 PRs in 5 months

Contributions summary:Benjamin contributed significantly to the runtime environment of the "rilldata/rill" repository, which focuses on BI-as-code using SQL. Their commits reveal a focus on the "runtime" component, including the implementation of the gRPC and HTTP handlers for the project. The user also worked on enhancing the query functionality, implementing dry run queries, and improving the handling of data types in the system, indicating they focused on the core logic of the system.

parquet-toolscsvanalyticsdata-setsduckdb

marcboeker/go-duckdb

Sep 2022 - Nov 2022

go-duckdb provides a database/sql driver for the DuckDB database engine.

Role in this project:

Back-end Developer

Contributions:9 reviews, 6 commits, 10 PRs in 1 month

Contributions summary:Benjamin primarily focused on enhancing the `go-duckdb` driver's functionality and compatibility. Their contributions include integrating DuckDB amalgamation for build optimization, resolving compilation issues, and expanding data type support to encompass all DuckDB types. They also addressed bugs related to non-prepared queries and implemented improvements for hugeint handling, specifically integrating the `math/big.Int` type. Furthermore, the user upgraded the driver to support DuckDB v0.6.

golangduckdbdatabase-enginefaunadbsql-database

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