HaasStefan Stefan Haas
Senior Software Engineer
EVIDENCE BASE
50
Repositories
1190
Commits
8060
Files analyzed
43
Technologies
553
Evidence
40
Active months
Based on 50 repository passports · 49/50 current
ENGINEERING PROFILE
Frontend95%
Backend75%
Testing91%
DevOps97%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
JSON Core
LANGUAGE · 47/50 repos · 2132 files · 808599 LOC
Depth 70 · HIGH
TypeScript Core
LANGUAGE · 46/50 repos · 2003 files · 61053 LOC
Depth 70 · HIGH
JavaScript Core
LANGUAGE · 36/50 repos · 1349 files · 1311479 LOC
Depth 70 · HIGH
Angular Core
FRAMEWORK · 34/50 repos · 865 files · 272660 LOC
Depth 78 · HIGH
ESLint Core
QUALITY · 43/50 repos · 560 files · 623946 LOC
Depth 77 · HIGH
Markdown Core
LANGUAGE · 47/50 repos · 312 files · 7583 LOC
Depth 70 · HIGH
Spring Framework Core
FRAMEWORK · 32/50 repos · 251 files · 26297 LOC
Depth 78 · HIGH
Rust Recurring
LANGUAGE · 2/50 repos · 204 files · 29537 LOC
Depth 70 · HIGH
TOML Recurring
LANGUAGE · 3/50 repos · 119 files · 3837 LOC
Depth 70 · HIGH
Prettier Core
QUALITY · 24/50 repos · 88 files · 334963 LOC
Depth 77 · HIGH
YAML Core
LANGUAGE · 9/50 repos · 68 files · 40444 LOC
Depth 70 · HIGH
npm Core
BUILD_TOOL · 46/50 repos · 46 files · 460 LOC
Depth 80 · HIGH
debug Core
LIBRARY · 5/50 repos · 39 files · 51614 LOC
Depth 74 · HIGH
Serde Recurring
LIBRARY · 2/50 repos · 27 files · 7137 LOC
Depth 93 · HIGH
Next.js Core
FRAMEWORK · 5/50 repos · 21 files · 109513 LOC
Depth 74 · HIGH
Vitest Core
TESTING · 5/50 repos · 21 files · 1857 LOC
React Core
FRAMEWORK · 7/50 repos · 21 files · 1461 LOC
Depth 58 · HIGH
Tokio Emerging
LIBRARY · 1/50 repos · 20 files · 2840 LOC
Depth 74 · HIGH
NestJS Emerging
FRAMEWORK · 1/50 repos · 16 files · 330 LOC
Depth 74 · HIGH
Cypress Core
TESTING · 13/50 repos · 10 files · 59 LOC
C# Emerging
LANGUAGE · 1/50 repos · 7 files · 46 LOC
Depth 70 · HIGH
Tokio Util Emerging
LIBRARY · 1/50 repos · 7 files · 1447 LOC
Depth 74 · HIGH
pnpm Core
BUILD_TOOL · 7/50 repos · 7 files · 70 LOC
Depth 80 · HIGH
Vue Emerging
LANGUAGE · 1/50 repos · 7 files · 217 LOC
Depth 70 · HIGH
React Router Recurring
LIBRARY · 2/50 repos · 6 files · 126 LOC
Depth 66 · HIGH
Python Emerging
LANGUAGE · 1/50 repos · 5 files · 373 LOC
Depth 70 · HIGH
Jest Core
TESTING · 22/50 repos · 4 files · 20 LOC
Vite Core
BUILD_TOOL · 4/50 repos · 4 files · 143 LOC
Depth 51 · HIGH
Cargo Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
NumPy Emerging
LIBRARY · 1/50 repos · 2 files · 147 LOC
Depth 62 · HIGH
Redis Recurring
CACHE · 2/50 repos · 2 files · 25040 LOC
Depth 65 · HIGH
Yarn Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
pip Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
Newtonsoft.Json Emerging
LIBRARY · 1/50 repos · 1 files · 15 LOC
Depth 44 · HIGH
NuGet Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
MongoDB Emerging
DATABASE · 1/50 repos · 1 files · 9953 LOC
Depth 65 · HIGH
Clap Recurring
LIBRARY · 2/50 repos · 0 files · 0 LOC
Axios Core
LIBRARY · 4/50 repos · 0 files · 0 LOC
Express Emerging
FRAMEWORK · 1/50 repos · 0 files · 0 LOC
Tailwind CSS Core
LIBRARY · 9/50 repos · 0 files · 0 LOC
esbuild Core
BUILD_TOOL · 4/50 repos · 0 files · 0 LOC
Testing Library Recurring
TESTING · 2/50 repos · 0 files · 0 LOC
Tracing Emerging
OBSERVABILITY · 1/50 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationabsent
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
vite-task Serde
ng-journal-insurance-portal ESLint
nx-giant ESLint
ngrx-leaky-backends ESLint
pokemon-search ESLint
nxdb ESLint
dynamic-module-federation ESLint
facade-pattern npm
ACTIVITY & OWNERSHIP
Active months 40
Commits 1190
Owner authored 0%
PRIMARY PROFILE — HR VIEW
FrontendJSON · TypeScript · JavaScriptTeam
In 30 sec: direction — frontend, core — JSON · TypeScript · JavaScript, 50 repos 2020 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
JSONTypeScriptJavaScriptAngularESLintTeam
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 887
Forks 122
Watchers 51
EVERYTHING ABOVE IS TRACEABLE
50 repositories · 1190 commits · 8060 files · 553 evidence
Absence of a technology in the passport does not imply lack of experience