jgcmarins João Marins
Node.js, React, React Native, GraphQL, Relay, TypeScript, Jest, Babel, Webpack, ESBuild, Vite, Vitest, Remix & MongoDB. Open Source enthusiast.
EVIDENCE BASE
30
Repositories
997
Commits
765
Files analyzed
34
Technologies
156
Evidence
59
Active months
Based on 30 repository passports · 26/30 current
ENGINEERING PROFILE
Frontend53%
Backend34%
Testing34%
DevOps50%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
TypeScript Core
LANGUAGE · 8/30 repos · 145 files · 8028 LOC
Depth 58 · HIGH
React Core
FRAMEWORK · 10/30 repos · 92 files · 5797 LOC
Depth 74 · HIGH
JavaScript Core
LANGUAGE · 12/30 repos · 84 files · 4199 LOC
Depth 70 · HIGH
Java Core
LANGUAGE · 5/30 repos · 60 files · 3263 LOC
Depth 70 · HIGH
C++ Core
LANGUAGE · 4/30 repos · 53 files · 1464 LOC
Depth 70 · HIGH
Markdown Core
LANGUAGE · 26/30 repos · 48 files · 2195 LOC
Depth 70 · HIGH
XML Recurring
LANGUAGE · 2/30 repos · 40 files · 715 LOC
Depth 70 · HIGH
JSON Core
LANGUAGE · 13/30 repos · 34 files · 9279 LOC
Depth 70 · HIGH
C Emerging
LANGUAGE · 1/30 repos · 21 files · 2100 LOC
Depth 70 · HIGH
Shell Core
LANGUAGE · 5/30 repos · 20 files · 240 LOC
Depth 70 · HIGH
ESLint Core
QUALITY · 7/30 repos · 17 files · 44046 LOC
Depth 84 · HIGH
MongoDB Recurring
DATABASE · 2/30 repos · 16 files · 411 LOC
Depth 96 · HIGH
Next.js Recurring
FRAMEWORK · 2/30 repos · 13 files · 746 LOC
Depth 70 · HIGH
npm Core
BUILD_TOOL · 12/30 repos · 12 files · 120 LOC
Depth 80 · HIGH
YAML Core
LANGUAGE · 4/30 repos · 11 files · 16351 LOC
Depth 70 · HIGH
Prettier Core
QUALITY · 4/30 repos · 8 files · 22342 LOC
Depth 65 · HIGH
Yarn Core
BUILD_TOOL · 6/30 repos · 6 files · 60 LOC
Depth 80 · HIGH
Gradle Core
LANGUAGE · 4/30 repos · 6 files · 83 LOC
Depth 70 · HIGH
GraphQL Recurring
LIBRARY · 2/30 repos · 5 files · 159 LOC
Depth 66 · HIGH
Express Emerging
FRAMEWORK · 1/30 repos · 4 files · 94 LOC
Depth 70 · HIGH
Zod Emerging
LIBRARY · 1/30 repos · 3 files · 511 LOC
Depth 66 · HIGH
Webpack Emerging
BUILD_TOOL · 1/30 repos · 3 files · 668 LOC
Depth 85 · HIGH
pnpm Recurring
BUILD_TOOL · 2/30 repos · 2 files · 20 LOC
Depth 80 · HIGH
JUnit Emerging
TESTING · 1/30 repos · 2 files · 24 LOC
Depth 30 · HIGH
Python Emerging
LANGUAGE · 1/30 repos · 2 files · 494 LOC
Depth 70 · HIGH
React Router Emerging
LIBRARY · 1/30 repos · 2 files · 78 LOC
Depth 62 · HIGH
TOML Emerging
LANGUAGE · 1/30 repos · 2 files · 22 LOC
Depth 70 · HIGH
NumPy Emerging
LIBRARY · 1/30 repos · 1 files · 174 LOC
Depth 37 · HIGH
body-parser Emerging
LIBRARY · 1/30 repos · 1 files · 19 LOC
Depth 45 · HIGH
Jest Emerging
TESTING · 1/30 repos · 1 files · 35 LOC
Depth 52 · HIGH
Vite Emerging
BUILD_TOOL · 1/30 repos · 1 files · 30 LOC
Depth 46 · HIGH
Kotlin Emerging
LANGUAGE · 1/30 repos · 1 files · 129 LOC
Depth 70 · HIGH
Dockerfile Emerging
LANGUAGE · 1/30 repos · 1 files · 13 LOC
Depth 70 · HIGH
Tailwind CSS Emerging
LIBRARY · 1/30 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationobserved
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
graphql-ufc-api GraphQL
ascii-art Markdown
woovi-kyc ESLint
awesome-scripts Markdown
mongodb-for-fintechs MongoDB
ACTIVITY & OWNERSHIP
Active months 59
Commits 997
Owner authored 100%
PRIMARY PROFILE — HR VIEW
FrontendTypeScript · React · JavaScriptHigh ownership
In 30 sec: direction — frontend, core — TypeScript · React · JavaScript, 30 repos 2015 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
TypeScriptReactJavaScriptJavaC++High ownership
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 321
Forks 49
Watchers 36
EVERYTHING ABOVE IS TRACEABLE
30 repositories · 997 commits · 765 files · 156 evidence
Absence of a technology in the passport does not imply lack of experience