Jiseok Choi
Software Engineer at Newmetric
Seoul, South Korea
Summary
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RockstarJiseok Choi is a Software Engineer based in Seoul with eight years of backend-focused experience building and optimizing database and ORM components. He contributes to notable open-source projects like Prisma Engines and GlueSQL, where he improves performance, removes inefficiencies, and implements SQL features such as TRIM while addressing Clippy/Rust best practices. At companies including Newmetric, Manythings, and HYPERITHM, he has consistently worked on backend systems and storage executors, bringing pragmatic refactors and measurable code-quality gains. Jiseok’s attention to low-level optimizations—converting strings to chars, removing redundant borrows, and preferring lazy operations—shows a strong lean toward performant, idiomatic Rust. He combines steady production experience with active open-source maintenance, making him a reliable engineer for performance-critical backend work.
7 years of coding experience
4 years of employment as a software developer
Github Skills (10)
code-optimization10
storage10
rust10
refactoring10
sql10
prisma10
database9
databases9
database-administration8
admin8
Programming languages (9)
Github contributions (5)
gluesql/gluesql
Aug 2021 - Jan 2023
GlueSQL is quite sticky. It attaches to anywhere.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:684 reviews, 80 commits, 105 PRs in 1 year 5 months
Contributions summary:Jiseok focused on removing unnecessary references and making code improvements within the GlueSQL project, primarily in the `executor` and `storage` modules. Their contributions included refactoring code, enhancing the efficiency of aggregate functions, and implementing new features such as the TRIM function with different options. They also updated and maintained the existing code base by resolving clippy warnings, and addressing other issues.
nosqlrustsql-databasesqlwebassembly
prisma/prisma-engines
Mar 2022 - Mar 2022
🚂 Engine components of Prisma ORM
Role in this project:Backend Developer
Backend DeveloperContributions:5 commits, 1 PR in 1 day
Contributions summary:Jiseok primarily focused on improving the code quality and performance of the Prisma Engines project. The contributions include refactoring code by replacing `unwrap_or` with `unwrap_or_else`, removing duplicate borrows, replacing `into_iter()` with `iter()`, and removing unnecessary `into()` calls to optimize the codebase. The user also converted single-character strings to `Char` for performance gains. These changes demonstrate a focus on code optimization and adherence to best practices in Rust.
prisma-ormprismarustgraphqltypescript
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