singyichen Ｍandy
Backend Developer | AI-native Backend Engineer
EVIDENCE BASE
50
Repositories
6865
Commits
2872
Files analyzed
51
Technologies
138
Evidence
28
Active months
Based on 50 repository passports · 15/50 current
ENGINEERING PROFILE
Frontend40%
Backend66%
Testing60%
DevOps66%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
Markdown Core
LANGUAGE · 13/50 repos · 1274 files · 218126 LOC
Depth 70 · HIGH
TypeScript Core
LANGUAGE · 4/50 repos · 473 files · 129999 LOC
Depth 70 · HIGH
Playwright Recurring
TESTING · 2/50 repos · 383 files · 44991 LOC
Depth 74 · HIGH
JavaScript Core
LANGUAGE · 6/50 repos · 324 files · 519431 LOC
Depth 70 · HIGH
JSON Core
LANGUAGE · 8/50 repos · 190 files · 58842 LOC
Depth 70 · HIGH
Python Core
LANGUAGE · 6/50 repos · 79 files · 5028 LOC
Depth 70 · HIGH
YAML Core
LANGUAGE · 4/50 repos · 60 files · 4682 LOC
Depth 70 · HIGH
React Core
FRAMEWORK · 4/50 repos · 58 files · 37385 LOC
Depth 58 · HIGH
Shell Recurring
LANGUAGE · 3/50 repos · 42 files · 7717 LOC
Depth 70 · HIGH
Redis Recurring
CACHE · 2/50 repos · 24 files · 70806 LOC
Depth 100 · HIGH
Rust Emerging
LANGUAGE · 1/50 repos · 22 files · 2903 LOC
Depth 70 · HIGH
pytest Core
TESTING · 4/50 repos · 16 files · 932 LOC
Depth 74 · HIGH
ESLint Core
QUALITY · 4/50 repos · 13 files · 17763 LOC
Depth 52 · HIGH
FastAPI Recurring
FRAMEWORK · 3/50 repos · 13 files · 801 LOC
Depth 74 · HIGH
Pydantic Recurring
LIBRARY · 3/50 repos · 10 files · 767 LOC
Depth 70 · HIGH
Vitest Recurring
TESTING · 3/50 repos · 10 files · 987 LOC
Depth 74 · HIGH
SQLAlchemy Emerging
LIBRARY · 1/50 repos · 7 files · 482 LOC
Depth 74 · HIGH
NumPy Recurring
LIBRARY · 2/50 repos · 6 files · 849 LOC
Depth 81 · HIGH
Prettier Recurring
QUALITY · 2/50 repos · 6 files · 14328 LOC
Depth 69 · HIGH
PostgreSQL Recurring
DATABASE · 2/50 repos · 5 files · 571 LOC
Depth 50 · HIGH
Next.js Recurring
FRAMEWORK · 2/50 repos · 5 files · 516 LOC
Depth 66 · HIGH
npm Core
BUILD_TOOL · 5/50 repos · 5 files · 50 LOC
Depth 80 · HIGH
Apache Kafka Recurring
MESSAGE_BROKER · 2/50 repos · 5 files · 40922 LOC
Depth 77 · HIGH
TOML Core
LANGUAGE · 4/50 repos · 5 files · 144 LOC
Depth 70 · HIGH
Svelte Recurring
FRAMEWORK · 2/50 repos · 4 files · 13959 LOC
Depth 58 · HIGH
MongoDB Recurring
DATABASE · 3/50 repos · 4 files · 2116 LOC
Depth 81 · HIGH
pandas Emerging
LIBRARY · 1/50 repos · 4 files · 610 LOC
Depth 74 · HIGH
Serde Emerging
LIBRARY · 1/50 repos · 3 files · 500 LOC
Depth 66 · HIGH
Starlette Recurring
FRAMEWORK · 2/50 repos · 3 files · 244 LOC
Depth 51 · HIGH
Alembic Emerging
DATABASE · 1/50 repos · 3 files · 144 LOC
Depth 66 · HIGH
Dockerfile Recurring
LANGUAGE · 3/50 repos · 3 files · 63 LOC
Depth 70 · HIGH
pip Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
Poetry Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
Prisma Recurring
DATABASE · 2/50 repos · 2 files · 1889 LOC
Depth 58 · HIGH
uv Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
React Router Emerging
LIBRARY · 1/50 repos · 2 files · 23 LOC
Depth 51 · HIGH
Elasticsearch Recurring
DATABASE · 2/50 repos · 2 files · 26331 LOC
Depth 65 · HIGH
RabbitMQ Recurring
MESSAGE_BROKER · 2/50 repos · 2 files · 7947 LOC
Depth 65 · HIGH
Requests Emerging
LIBRARY · 1/50 repos · 1 files · 113 LOC
Depth 37 · HIGH
Axios Emerging
LIBRARY · 1/50 repos · 1 files · 8 LOC
Depth 41 · HIGH
Vite Emerging
BUILD_TOOL · 1/50 repos · 1 files · 5 LOC
Depth 36 · HIGH
SQL Emerging
LANGUAGE · 1/50 repos · 1 files · 58 LOC
Depth 70 · HIGH
Uvicorn Emerging
LIBRARY · 1/50 repos · 1 files · 148 LOC
Depth 58 · HIGH
Cargo Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
pnpm Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
Socket.IO Emerging
LIBRARY · 1/50 repos · 1 files · 13 LOC
Depth 43 · HIGH
Jest Recurring
TESTING · 3/50 repos · 1 files · 313 LOC
debug Emerging
LIBRARY · 1/50 repos · 1 files · 67 LOC
Depth 58 · HIGH
Vue Emerging
FRAMEWORK · 1/50 repos · 1 files · 1858 LOC
Depth 58 · HIGH
Pipenv Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
Clap Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationobserved
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
images Markdown
vite-react npm
git-example Python
ML-HK Markdown
labor-law-assistant PostgreSQL
label-suite Redis
obsidian-sync TypeScript
ACTIVITY & OWNERSHIP
Active months 28
Commits 6865
Owner authored 91%
PRIMARY PROFILE — HR VIEW
FrontendMarkdown · TypeScript · PlaywrightHigh ownership
In 30 sec: direction — frontend, core — Markdown · TypeScript · Playwright, 50 repos 2020 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
MarkdownTypeScriptPlaywrightJavaScriptJSONHigh ownership
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 13
Forks 0
Watchers 10
EVERYTHING ABOVE IS TRACEABLE
50 repositories · 6865 commits · 2872 files · 138 evidence
Absence of a technology in the passport does not imply lack of experience