Dan Printzell

Sweden

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Summary

👤

Senior

Dan Printzell is a software engineer with around 12 years of experience, currently shaping cross-platform and performance-focused software at Dagg AI in Sweden, and the creator of the PowerNex project. He blends backend systems work with hands-on OS and compiler development, contributing to the D language ecosystem as a backend engineer on the ldc and dmd projects, implementing runtime hooks and refining array handling with templated functions. His open-source footprint includes authoring and maintaining parts of the D compiler and helping ensure robust array and assertion semantics, reflecting a deep interest in language tooling and runtime correctness. Previously, he led MacOS and Linux port efforts at Mutate AB, designing platform abstractions, ARM64 support, and GPU scheduling/rendering tooling to achieve feature parity and performance gains. He is a seasoned Google Summer of Code alum with The D Language Foundation and holds a Master’s and Bachelor’s in Computer Science from Blekinge Institute of Technology, based in Farsta, Sweden. He combines a passion for exploring new environments with a track record of shipping reliable, portable software and contributing to open-source compiler and GPU tooling projects.

13 years of coding experience

Github Skills (11)

compiler10

programming-language10

compiler-compiler10

dword10

programming-languages10

dt10

compilers10

llvm10

dmd9

template-metaprogramming9

unit-testing9

Programming languages (6)

TypeScriptShellC++CDPascal

Github contributions (5)

dlang/dmd

May 2019 - Jul 2019

dmd D Programming Language compiler

Role in this project:

Back-end Developer

Contributions:17 commits, 5 PRs, 34 comments in 2 months

Contributions summary:Dan primarily contributed to the D Programming Language compiler, focusing on implementing and modifying runtime hooks within the `dmd` repository. Their work involved adding and verifying the existence of these hooks for features like array manipulation and assertions. They refactored array handling by introducing templated versions of key functions like `_d_arraysetlengthT`, `_d_arrayctor`, and `_d_arrayappend{T,cTX}`, improving code efficiency and flexibility. Additionally, they added a test case to verify the `verifyHookExist` function.

compilersnativedubdmdstandard-library

ldc-developers/ldc

May 2019 - Jul 2019

The LLVM-based D Compiler.

Role in this project:

Back-end Developer

Contributions:15 commits, 1 comment in 2 months

Contributions summary:Dan focused on enhancing the D compiler's backend, specifically contributing to the expression and statement semantic analysis phases. They implemented and validated runtime hook checks for array operations, switch statements, and assert messages. The user also added a templated version of the `_d_arraysetlengthT` function and `_d_arrayappend{T,cTX}` to improve the efficiency of array manipulations. The modifications suggest an effort to refine compiler internals and associated runtime behavior.

compilerldcdlangllvmd

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