David Callies
Software Engineer at Meta
Alexandria, Virginia, United States
Summary
🤩
Rockstar🎓
Top SchoolDavid Callies is a software engineer at Meta with 11+ years building high-scale distributed systems, continuous delivery, and integrity platforms like ThreatExchange. He contributes to open source trust-and-safety tooling (notably on facebook/ThreatExchange) and to industry initiatives including GIFCT, Technology Coalition, and StopNCII.org, blending engineering with policy-minded collaboration. His background includes managing releases and CI for hundreds of thousands of nodes and hands-on backend work in projects such as Magma. A prolific interviewer and instructor—having conducted over 600 interviews and teaching "Mastering Your Technical Interview"—he pairs deep systems expertise with a talent for coaching engineers to perform under pressure.
11 years of coding experience
1 year of employment as a software developer
Computer Science, Computer Science, Computer Science, Computer Science at University of Central Florida
Github Skills (18)
debugging10
debug10
data-collection10
python10
networking10
collections10
magma10
metric10
code-formatting10
api-design9
bash9
api9
grpc9
open-source8
hash7
Programming languages (2)
Github contributions (5)
facebook/ThreatExchange
Jun 2020 - Jan 2023
Trust & Safety tools for working together to fight digital harms.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1039 reviews, 236 commits, 897 PRs in 2 years 6 months
Contributions summary:David primarily contributed to the development of the `te-tag-query-python` module, focusing on enhancements and fixing bugs. Their contributions included adding functionality with `__name__ == '__main__'`, formatting code, resolving a `.sort()` versus `sorted()` bug. Additionally, they integrated automatic formatting with Black to improve code style consistency within the project.
queryingsecurityshufflecybersecurityblue-team
magma/magma
Jun 2019 - Jun 2019
Platform for building access networks and modular network services
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 commits in 9 days
Contributions summary:David primarily contributed to the Python codebase within the Magma project, addressing configuration issues and restoring functionality related to service management. They made changes to scripts, specifically `magma_get_config.py` and `magma_conditional_service.py`, adapting them to changes in data structures and ensuring compatibility. Furthermore, the user integrated a metrics post-processor to allow for ODS tagging. The user also corrected pylint errors.
pythonmobileltevagrant5g
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