yannklein Yann Klein
Lead web dev teacher @lewagon. I code for people & magic ✨
EVIDENCE BASE
50
Repositories
2043
Commits
2055
Files analyzed
36
Technologies
268
Evidence
77
Active months
Based on 50 repository passports · 49/50 current
ENGINEERING PROFILE
Frontend75%
Backend28%
Testing28%
DevOps51%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
Ruby Core
LANGUAGE · 19/50 repos · 285 files · 7744 LOC
Depth 70 · HIGH
JavaScript Core
LANGUAGE · 36/50 repos · 189 files · 26465 LOC
Depth 70 · HIGH
TypeScript Core
LANGUAGE · 10/50 repos · 138 files · 6228 LOC
Depth 71 · HIGH
React Core
FRAMEWORK · 9/50 repos · 90 files · 4189 LOC
Depth 74 · HIGH
Svelte Recurring
LANGUAGE · 2/50 repos · 69 files · 3546 LOC
Depth 70 · HIGH
JSON Core
LANGUAGE · 26/50 repos · 62 files · 57496 LOC
Depth 70 · HIGH
YAML Core
LANGUAGE · 17/50 repos · 61 files · 2650 LOC
Depth 70 · HIGH
Markdown Core
LANGUAGE · 31/50 repos · 49 files · 2348 LOC
Depth 70 · HIGH
Ruby on Rails Core
FRAMEWORK · 5/50 repos · 49 files · 686 LOC
Depth 96 · HIGH
Next.js Recurring
FRAMEWORK · 3/50 repos · 31 files · 1732 LOC
Depth 81 · HIGH
ESLint Core
QUALITY · 12/50 repos · 27 files · 77063 LOC
Depth 84 · HIGH
npm Core
BUILD_TOOL · 17/50 repos · 17 files · 170 LOC
Depth 80 · HIGH
Redis Core
CACHE · 7/50 repos · 15 files · 1226 LOC
Depth 69 · HIGH
SQL Recurring
LANGUAGE · 2/50 repos · 13 files · 195 LOC
Depth 70 · HIGH
Python Recurring
LANGUAGE · 2/50 repos · 11 files · 850 LOC
Depth 70 · HIGH
Prisma Recurring
DATABASE · 2/50 repos · 10 files · 795 LOC
Depth 85 · HIGH
Bundler Core
BUILD_TOOL · 10/50 repos · 10 files · 100 LOC
Depth 80 · HIGH
Yarn Core
BUILD_TOOL · 7/50 repos · 7 files · 70 LOC
Depth 80 · HIGH
Vite Core
BUILD_TOOL · 5/50 repos · 6 files · 73 LOC
Depth 54 · HIGH
React Router Recurring
LIBRARY · 2/50 repos · 6 files · 323 LOC
Depth 62 · HIGH
MongoDB Recurring
DATABASE · 3/50 repos · 5 files · 3005 LOC
Depth 61 · HIGH
Webpack Core
BUILD_TOOL · 5/50 repos · 4 files · 48 LOC
Depth 49 · HIGH
Dockerfile Recurring
LANGUAGE · 3/50 repos · 3 files · 62 LOC
Depth 70 · HIGH
pip Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
Playwright Recurring
LIBRARY · 2/50 repos · 2 files · 422 LOC
Depth 45 · HIGH
TOML Recurring
LANGUAGE · 2/50 repos · 2 files · 6 LOC
Depth 70 · HIGH
PostgreSQL Emerging
DATABASE · 1/50 repos · 1 files · 3638 LOC
Depth 61 · HIGH
Requests Emerging
LIBRARY · 1/50 repos · 1 files · 17 LOC
Depth 45 · HIGH
Shell Emerging
LANGUAGE · 1/50 repos · 1 files · 14 LOC
Depth 70 · HIGH
Flask Emerging
FRAMEWORK · 1/50 repos · 1 files · 69 LOC
Depth 58 · HIGH
debug Emerging
LIBRARY · 1/50 repos · 1 files · 1 LOC
Depth 38 · HIGH
Express Emerging
FRAMEWORK · 1/50 repos · 1 files · 28 LOC
Depth 45 · HIGH
RabbitMQ Emerging
MESSAGE_BROKER · 1/50 repos · 1 files · 545 LOC
Depth 61 · HIGH
XML Emerging
LANGUAGE · 1/50 repos · 1 files · 119 LOC
Depth 70 · HIGH
Sidekiq Emerging
MESSAGE_BROKER · 1/50 repos · 1 files · 11 LOC
Depth 49 · HIGH
Tailwind CSS Recurring
LIBRARY · 2/50 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationobserved
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
iamyann Markdown
react-workshop-2023 ESLint
aframe-ar-workshop Markdown
my_video_recording_app Ruby on Rails
react-workshop ESLint
your-ar-hologram Ruby on Rails
arte-jr-suber pip
tech-eventboard npm
ACTIVITY & OWNERSHIP
Active months 77
Commits 2043
Owner authored 100%
PRIMARY PROFILE — HR VIEW
FrontendRuby · JavaScript · TypeScriptHigh ownership
In 30 sec: direction — frontend, core — Ruby · JavaScript · TypeScript, 50 repos 2018 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
RubyJavaScriptTypeScriptReactSvelteHigh ownership
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 55
Forks 37
Watchers 41
EVERYTHING ABOVE IS TRACEABLE
50 repositories · 2043 commits · 2055 files · 268 evidence
Absence of a technology in the passport does not imply lack of experience