Julia Longtin
Industry Mentor at Human Feedback Foundation
Berlin, Germany
Summary
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RockstarJulia Longtin is a seasoned Free Software developer and engineering leader based in Berlin with 15+ years building and delivering secure, large-scale systems for governments and enterprise customers. Currently Senior Director of Service Delivery Engineering at Wire, she combines hands-on Haskell and C development with platform and on‑prem deployment expertise, having automated complex offline installations and multi-architecture build pipelines. A prolific open-source contributor (including work on Wire’s backend and the Haskell CAD tool ImplicitCAD), she also invented a 3D printing aluminum casting process and has led product and infrastructure squads end-to-end. Comfortable advising everyone from C-level execs to first-time computer users, she mentors AI students and focuses now on Haskell-driven 3D printing technologies alongside enterprise automation. Her pragmatic instinct to automate “any task—but not when it’s worse than manual” reflects a rare blend of deep technical skill, operational judgment, and community-driven craftsmanship.
15 years of coding experience
17 years of employment as a software developer
English, Japanese, German, klingon
Github Skills (10)
rust10
wires10
cassandra10
server10
haskell10
dxf10
computer-engineering9
csg8
3d-printing8
openscad8
Programming languages (17)
Github contributions (5)
Haskell-Things/ImplicitCAD
Jan 2017 - Nov 2022
A math-inspired CAD program in haskell. CSG, bevels, and shells; 2D & 3D geometry; 2D gcode generation...
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 releases, 89 reviews, 741 commits in 5 years 11 months
Contributions summary:Julia primarily focused on enhancing the "implicitcad" project by implementing support for AutoCAD R12 DXF export, improving code clarity through minor import changes, and version bumping. The contributions involved creating new file format exporters for CAD, specifically for AutoCAD R12/13 DXF, which required understanding of data structures and text builder functionalities within Haskell. These modifications, including the addition of functions for generating GCode for laser cutting within the HackLab environment, suggest a focus on adding functionality within the CAD application.
mathcad3d-geometrygcode-generationhaskell
wireapp/wire-server
Jan 2019 - Jun 2022
🇪🇺 Wire back-end services
Role in this project:Back-end Developer
Back-end DeveloperContributions:93 reviews, 86 commits, 47 PRs in 3 years 5 months
Contributions summary:Julia primarily contributed to the `wire-server` back-end services. Their work involved architectural adjustments for non-amd64 architectures, addressing portability issues. They refactored code related to Cassandra database interactions, improving clarity and maintainability by using explicit imports. Additionally, they made minor improvements to the project's code, such as removing unneeded includes.
golangreactrusthaskellnodejs
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