Julius De Bruijn
Founding Engineer at Twin
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolJulius De Bruijn is a product-focused founding engineer with 11 years of experience and 8+ years specializing in Rust, shipping infrastructure and developer-experience products from research to production. He has been a core contributor to Prisma (supporting 12M+ weekly downloads) and authored the Tiberius SQL Server driver in Rust which has 3.3M downloads, demonstrating both deep systems expertise and large-scale open-source impact. At Grafbase he led the design and launch of the Nexus AI router, a PostgreSQL WASI connector, and an SDK with extensive docs and market-driven extensibility. Julius pioneered commercial async Rust work as early as 2016, building one of the first production systems on Tokio 0.1 and later powering high-throughput push infrastructure handling 100M+ daily notifications. He blends hands-on engineering, API and driver design, and technical writing to deliver end-to-end solutions that prioritize developer experience. Based in Berlin and active in OSS, he often pairs protocol-level engineering with product insight to close gaps left by incumbents like Hasura and Apollo Router.
11 years of coding experience
15 years of employment as a software developer
Aalto University
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (26)
caching10
postgresql10
query-builder10
datatypes10
mysql10
databases10
user-authentication10
authentication10
sql-server10
sql10
query-engine10
rust10
relational-databases10
sql-database10
database10
Programming languages (24)
Github contributions (5)
prisma/tiberius
Mar 2020 - Jan 2023
TDS 7.2+ (Microsoft SQL Server) driver for Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:42 reviews, 372 commits, 248 PRs in 2 years 10 months
Contributions summary:Julius implemented core back-end functionality for the database driver, specifically focusing on handling SQL Server login authentication and implementing support for various data types within the TDS protocol. This included modifications to the connection process to handle different authentication methods and the addition of functionalities such as reading and writing of specific data types like `u8`, `i16`, `i32`, `i64`, `f32`, `f64`, strings, and `XmlData`. Furthermore, they improved code readability by addressing code style suggestions and fixing the handling of `TEXT` and `IMAGE` types.
drivermicrosoft-sql-serverrusttds
prisma/prisma-engines
Jan 2019 - Jan 2023
🚂 Engine components of Prisma ORM
Role in this project:Back-end Developer
Back-end DeveloperContributions:1044 reviews, 1096 commits, 1043 PRs in 4 years
Contributions summary:Julius focused on modifying the query engine, adding new features and refining existing ones. They implemented the ability to get port information from environment variables for the query engine. Furthermore, they upgraded the Quaint library version, and added more features regarding data fetching from SQL.
prisma-ormprismarustloggy-coreloggy-terminal
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