KATT Alex / KATT
Fully stacked typescripter. @tRPC creator. Been coding for 20+ years. "KATT" means cat in Swedish.
EVIDENCE BASE
269
Repositories
10543
Commits
25567
Files analyzed
53
Technologies
942
Evidence
148
Active months
Based on 269 repository passports · 101/269 current
ENGINEERING PROFILE
Frontend93%
Backend26%
Testing58%
DevOps89%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
TypeScript Core
LANGUAGE · 68/269 repos · 14526 files · 2540504 LOC
Depth 70 · HIGH
Markdown Core
LANGUAGE · 85/269 repos · 3042 files · 279805 LOC
Depth 70 · HIGH
JSON Core
LANGUAGE · 95/269 repos · 2406 files · 148852 LOC
Depth 70 · HIGH
React Core
FRAMEWORK · 48/269 repos · 1593 files · 175284 LOC
Depth 74 · HIGH
YAML Core
LANGUAGE · 40/269 repos · 1266 files · 199876 LOC
Depth 70 · HIGH
Vitest Core
TESTING · 7/269 repos · 1259 files · 385654 LOC
JavaScript Core
LANGUAGE · 64/269 repos · 737 files · 61810 LOC
Depth 70 · HIGH
Playwright Core
TESTING · 6/269 repos · 434 files · 34899 LOC
Vite Core
BUILD_TOOL · 8/269 repos · 407 files · 24022 LOC
Zod Core
LIBRARY · 21/269 repos · 304 files · 77751 LOC
Depth 81 · HIGH
ESLint Core
QUALITY · 49/269 repos · 253 files · 270379 LOC
Depth 61 · HIGH
Next.js Core
FRAMEWORK · 43/269 repos · 230 files · 56008 LOC
Depth 47 · HIGH
Angular Emerging
FRAMEWORK · 1/269 repos · 113 files · 8382 LOC
Depth 74 · HIGH
Prettier Core
QUALITY · 37/269 repos · 105 files · 180526 LOC
Depth 73 · HIGH
Svelte Emerging
LANGUAGE · 1/269 repos · 103 files · 2771 LOC
Depth 70 · HIGH
npm Core
BUILD_TOOL · 90/269 repos · 90 files · 900 LOC
Depth 80 · HIGH
Vue Recurring
LANGUAGE · 2/269 repos · 89 files · 2613 LOC
Depth 70 · HIGH
Prisma Core
DATABASE · 7/269 repos · 52 files · 7851 LOC
Depth 70 · HIGH
PostgreSQL Core
DATABASE · 9/269 repos · 49 files · 26129 LOC
Depth 41 · HIGH
React Router Recurring
LIBRARY · 2/269 repos · 45 files · 4067 LOC
Depth 85 · HIGH
Express Core
FRAMEWORK · 13/269 repos · 39 files · 1890 LOC
Depth 53 · HIGH
Spring Framework Emerging
FRAMEWORK · 1/269 repos · 38 files · 3882 LOC
Depth 74 · HIGH
debug Core
LIBRARY · 5/269 repos · 35 files · 54203 LOC
Depth 74 · HIGH
Yarn Core
BUILD_TOOL · 32/269 repos · 32 files · 320 LOC
Depth 80 · HIGH
C++ Core
LANGUAGE · 5/269 repos · 30 files · 642 LOC
Depth 70 · HIGH
pnpm Core
BUILD_TOOL · 24/269 repos · 24 files · 240 LOC
Depth 80 · HIGH
Redis Core
CACHE · 5/269 repos · 23 files · 60449 LOC
Depth 65 · HIGH
SQL Core
LANGUAGE · 9/269 repos · 17 files · 168 LOC
Depth 70 · HIGH
Shell Recurring
LANGUAGE · 3/269 repos · 16 files · 511 LOC
Depth 70 · HIGH
Python Emerging
LANGUAGE · 1/269 repos · 14 files · 1573 LOC
Depth 70 · HIGH
TOML Core
LANGUAGE · 9/269 repos · 14 files · 86 LOC
Depth 70 · HIGH
Lodash Core
LIBRARY · 8/269 repos · 12 files · 3217 LOC
Depth 62 · HIGH
MongoDB Recurring
DATABASE · 3/269 repos · 11 files · 5237 LOC
Depth 78 · HIGH
Jest Core
TESTING · 7/269 repos · 10 files · 2761 LOC
Webpack Recurring
BUILD_TOOL · 3/269 repos · 10 files · 845 LOC
Depth 41 · HIGH
Axios Recurring
LIBRARY · 3/269 repos · 9 files · 1031 LOC
Depth 58 · HIGH
Tailwind CSS Core
LIBRARY · 11/269 repos · 6 files · 89 LOC
GraphQL Core
LIBRARY · 8/269 repos · 5 files · 1274 LOC
body-parser Recurring
LIBRARY · 3/269 repos · 3 files · 88 LOC
Depth 53 · HIGH
Redux Emerging
LIBRARY · 1/269 repos · 3 files · 31 LOC
Depth 58 · HIGH
XML Recurring
LANGUAGE · 2/269 repos · 3 files · 53 LOC
Depth 70 · HIGH
Apache Kafka Recurring
MESSAGE_BROKER · 3/269 repos · 3 files · 23321 LOC
Depth 61 · HIGH
Socket.IO Recurring
LIBRARY · 2/269 repos · 2 files · 224 LOC
Depth 48 · HIGH
PHP Emerging
LANGUAGE · 1/269 repos · 2 files · 145 LOC
Depth 70 · HIGH
NumPy Emerging
LIBRARY · 1/269 repos · 1 files · 96 LOC
Depth 58 · HIGH
Poetry Emerging
BUILD_TOOL · 1/269 repos · 1 files · 10 LOC
Depth 80 · HIGH
Supertest Emerging
TESTING · 1/269 repos · 1 files · 10 LOC
Depth 21 · HIGH
Ruby Emerging
LANGUAGE · 1/269 repos · 1 files · 1 LOC
Depth 70 · HIGH
pytest Emerging
TESTING · 1/269 repos · 1 files · 738 LOC
Depth 37 · HIGH
JSON Web Tokens Emerging
SECURITY · 1/269 repos · 0 files · 0 LOC
Passport Emerging
SECURITY · 1/269 repos · 0 files · 0 LOC
Mocha Recurring
TESTING · 2/269 repos · 0 files · 0 LOC
Testing Library Recurring
TESTING · 2/269 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationabsent
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
envsafe Prettier
next-router-query Next.js
next-ssr-form ESLint
next-use-query-params Next.js
toggl-iCal Prettier
ACTIVITY & OWNERSHIP
Active months 148
Commits 10543
Owner authored 44%
PRIMARY PROFILE — HR VIEW
FrontendTypeScript · Markdown · JSONTeam
In 30 sec: direction — frontend, core — TypeScript · Markdown · JSON, 269 repos 2011 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
TypeScriptMarkdownJSONReactYAMLTeam
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 1148
Forks 49
Watchers 102
EVERYTHING ABOVE IS TRACEABLE
269 repositories · 10543 commits · 25567 files · 942 evidence
Absence of a technology in the passport does not imply lack of experience