justinchuby Justin Chu
Code for the better. @Microsoft AI Frameworks. Previously @google [x] (@theteamatx the Moonshot Factory); CMU.
EVIDENCE BASE
50
Repositories
11861
Commits
10604
Files analyzed
58
Technologies
475
Evidence
76
Active months
Based on 50 repository passports · 50/50 current
ENGINEERING PROFILE
Frontend50%
Backend62%
Testing56%
DevOps64%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
TypeScript Core
LANGUAGE · 18/50 repos · 1857 files · 381146 LOC
Depth 70 · HIGH
Rust Core
LANGUAGE · 5/50 repos · 1378 files · 1088963 LOC
Depth 70 · HIGH
Markdown Core
LANGUAGE · 46/50 repos · 1235 files · 271877 LOC
Depth 70 · HIGH
Python Core
LANGUAGE · 29/50 repos · 1046 files · 285138 LOC
Depth 70 · HIGH
JSON Core
LANGUAGE · 26/50 repos · 1028 files · 1737088 LOC
Depth 70 · HIGH
YAML Core
LANGUAGE · 31/50 repos · 979 files · 112714 LOC
Depth 70 · HIGH
Vitest Core
TESTING · 8/50 repos · 726 files · 150520 LOC
Depth 53 · HIGH
React Core
FRAMEWORK · 9/50 repos · 365 files · 81243 LOC
Depth 74 · HIGH
NumPy Core
LIBRARY · 17/50 repos · 303 files · 101383 LOC
Depth 85 · HIGH
pytest Core
TESTING · 10/50 repos · 184 files · 55394 LOC
Depth 57 · HIGH
JavaScript Core
LANGUAGE · 19/50 repos · 153 files · 14300 LOC
Depth 70 · HIGH
TOML Core
LANGUAGE · 17/50 repos · 118 files · 5369 LOC
Depth 70 · HIGH
React Router Recurring
LIBRARY · 2/50 repos · 88 files · 22308 LOC
Depth 74 · HIGH
Shell Core
LANGUAGE · 8/50 repos · 54 files · 12030 LOC
Depth 70 · HIGH
Express Emerging
FRAMEWORK · 1/50 repos · 50 files · 9221 LOC
Depth 74 · HIGH
Serde Emerging
LIBRARY · 1/50 repos · 41 files · 21617 LOC
Depth 78 · HIGH
C++ Core
LANGUAGE · 7/50 repos · 41 files · 22710 LOC
Depth 70 · HIGH
SQL Emerging
LANGUAGE · 1/50 repos · 32 files · 391 LOC
Depth 70 · HIGH
Zod Recurring
LIBRARY · 2/50 repos · 19 files · 2327 LOC
Depth 93 · HIGH
Tokio Emerging
LIBRARY · 1/50 repos · 17 files · 19817 LOC
Depth 74 · HIGH
npm Core
BUILD_TOOL · 17/50 repos · 17 files · 170 LOC
Depth 80 · HIGH
Poetry Core
BUILD_TOOL · 15/50 repos · 15 files · 150 LOC
Depth 80 · HIGH
PowerShell Recurring
LANGUAGE · 3/50 repos · 13 files · 971 LOC
Depth 70 · HIGH
ESLint Core
QUALITY · 8/50 repos · 13 files · 39502 LOC
Depth 65 · HIGH
Axum Emerging
FRAMEWORK · 1/50 repos · 12 files · 14154 LOC
Depth 74 · HIGH
Vite Core
BUILD_TOOL · 9/50 repos · 10 files · 341 LOC
Depth 58 · HIGH
Redis Core
CACHE · 5/50 repos · 10 files · 14861 LOC
Depth 69 · HIGH
pip Core
BUILD_TOOL · 9/50 repos · 9 files · 90 LOC
Depth 80 · HIGH
Playwright Emerging
TESTING · 1/50 repos · 9 files · 675 LOC
Depth 74 · HIGH
Next.js Recurring
FRAMEWORK · 2/50 repos · 7 files · 17535 LOC
Depth 74 · HIGH
Prettier Recurring
QUALITY · 3/50 repos · 7 files · 26732 LOC
Depth 65 · HIGH
C Recurring
LANGUAGE · 2/50 repos · 6 files · 2483 LOC
Depth 70 · HIGH
Cargo Core
BUILD_TOOL · 4/50 repos · 4 files · 40 LOC
Depth 80 · HIGH
debug Recurring
LIBRARY · 2/50 repos · 4 files · 1361 LOC
Depth 58 · HIGH
Bytes Emerging
LIBRARY · 1/50 repos · 3 files · 913 LOC
Depth 70 · HIGH
Vue Recurring
LANGUAGE · 2/50 repos · 3 files · 378 LOC
Depth 70 · HIGH
pnpm Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
Tokio Stream Emerging
LIBRARY · 1/50 repos · 2 files · 841 LOC
Depth 62 · HIGH
Click Emerging
LIBRARY · 1/50 repos · 1 files · 50 LOC
Depth 58 · HIGH
Svelte Emerging
FRAMEWORK · 1/50 repos · 1 files · 378 LOC
Depth 37 · HIGH
Requests Emerging
LIBRARY · 1/50 repos · 1 files · 30 LOC
Depth 50 · HIGH
Axios Emerging
LIBRARY · 1/50 repos · 1 files · 101 LOC
Depth 58 · HIGH
GraphQL Emerging
LIBRARY · 1/50 repos · 1 files · 378 LOC
Depth 37 · HIGH
AWS SDK Emerging
CLOUD · 1/50 repos · 1 files · 71 LOC
Depth 58 · HIGH
Flask Emerging
FRAMEWORK · 1/50 repos · 1 files · 13 LOC
Depth 43 · HIGH
Jest Emerging
TESTING · 1/50 repos · 1 files · 415 LOC
Depth 37 · HIGH
RabbitMQ Emerging
MESSAGE_BROKER · 1/50 repos · 1 files · 626 LOC
Depth 61 · HIGH
XML Emerging
LANGUAGE · 1/50 repos · 1 files · 9 LOC
Depth 70 · HIGH
mypy Recurring
QUALITY · 2/50 repos · 0 files · 0 LOC
Black Recurring
QUALITY · 2/50 repos · 0 files · 0 LOC
Reqwest Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
Tracing Recurring
OBSERVABILITY · 2/50 repos · 0 files · 0 LOC
Ruff Recurring
QUALITY · 3/50 repos · 0 files · 0 LOC
Clap Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
Tailwind CSS Core
LIBRARY · 4/50 repos · 0 files · 0 LOC
Testing Library Emerging
TESTING · 1/50 repos · 0 files · 0 LOC
typing_extensions Recurring
LIBRARY · 2/50 repos · 0 files · 0 LOC
Webpack Emerging
BUILD_TOOL · 1/50 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationabsent
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
flightdeck Zod
model-explorer-onnx NumPy
onnx-safetensors NumPy
onnx-genai NumPy
weights-viz React
onnxruntime-mlx NumPy
clang-format-black Markdown
web-praat NumPy
ACTIVITY & OWNERSHIP
Active months 76
Commits 11861
Owner authored 99%
PRIMARY PROFILE — HR VIEW
BackendTypeScript · Rust · MarkdownHigh ownership
In 30 sec: direction — backend, core — TypeScript · Rust · Markdown, 50 repos 2016 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
TypeScriptRustMarkdownPythonJSONHigh ownership
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 302
Forks 42
Watchers 38
EVERYTHING ABOVE IS TRACEABLE
50 repositories · 11861 commits · 10604 files · 475 evidence
Absence of a technology in the passport does not imply lack of experience