David Carlier
Software Engineer at DeviceAtlas
Ireland
Summary
🤩
Rockstar🎓
Top SchoolDavid Carlier is a seasoned software engineer with 11+ years building low-level, cross-platform systems in C/C++ (and Java, Python, Go) across Linux, BSD variants and macOS. He has strong expertise in portability, build systems and memory allocators, evidenced by contributions to high-profile projects like LLVM, Rust, jemalloc, OpenSSL and the Rust and Zig ecosystems. A long-time FreeBSD/OpenBSD advocate, he authors BSDMag content, wrote a FreeBSD kernel module ebook and regularly ports and hardens tooling for BSD platforms. At DeviceAtlas and now the PHP Foundation he blends product work with deep system plumbing—nginx/haproxy modules, packaging and OS-specific optimizations. His open-source footprint spans fuzzers (AFLplusplus, honggfuzz), compilers and runtimes, and game engines, showing rare breadth from security tooling to graphics and emulation. Colleagues rely on him for pragmatic cross-OS fixes that quietly make large codebases more portable and robust.
12 years of coding experience
11 years of employment as a software developer
Conservatoire national des arts et métiers - Cnam
French, English
Github Skills (198)
opencv10
il10
reverse-proxy10
dragonflybsd10
python10
multithreading10
sdl10
testing10
command-line-interface10
databases10
http10
proxy10
cmake10
winapi10
c1110
Programming languages (23)
Github contributions (5)
rust-lang/libc
May 2021 - Jan 2023
Raw bindings to platform APIs for Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:98 reviews, 298 commits, 502 PRs in 1 year 8 months
Contributions summary:David's contributions primarily involve extending the `libc` library, specifically raw bindings to platform APIs for Rust. Their work focused on adding support for new system calls, structures, constants, and data types. The user's impact includes broadening the library's platform coverage by adding system calls and data types for OpenBSD, FreeBSD, Haiku, and other operating systems, which allows Rust developers to interface with system-level APIs more effectively.
rust
microsoft/snmalloc
Jul 2019 - Jan 2023
Message passing based allocator
Role in this project:Back-end Developer
Back-end DeveloperContributions:60 reviews, 53 commits, 77 PRs in 3 years 6 months
Contributions summary:David focused on platform abstraction layer (PAL) implementations within the `snmalloc` project, primarily supporting various operating systems, including OpenBSD, FreeBSD, Haiku, Solaris, and DragonFly. They added specific system calls or functionalities and addressed build and compilation issues. The contributions involved modifying and extending the existing memory allocation system to integrate with specific operating system features and address system-specific memory management.
allocatormessage-passingmallocmemory-allocator
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