FRONTEND & FULLSTACK DEVELOPER

Hi, I'm Mario Johar

I build scalable apps that blend technology, design & purpose.

Mexico · UTC-6 6 years React / Next / Vue / Node / Python
Mario Johar
Mario Johar
dev · designer · builder
status
open to work
role
remote, full-time
local time
--:--:--

A frontend dev with a fullstack brain.

I build scalable, user-focused products with global teams across fintech, edtech, retail and enterprise — pairing strong technical thinking with a collaborative, human-centered mindset.

My approach is simple: write clean, maintainable code while keeping the end-user experience at the front of every decision. I like the messy middle — turning fuzzy ideas into interfaces that simplify complexity and empower people.

What I'm shipping NEW

What I'm actively building and shipping right now. More projects coming soon.

01 Shipped

Klash

A web app for private football prediction groups: predict scores before kickoff, compete on live rankings with automatic scoring. Built for the 2026 World Cup, it ran every fixture through to the final and stays online in read-only mode. Real-time prediction locking, Google OAuth, rate limiting, admin dashboard, ES/EN, and a public bracket simulator anyone can play.

Next.jsTypeScriptSupabaseTailwindi18n
progress 100%
Visit Klash
02 In progress

Zombies EE

A cinematic Call of Duty Zombies guide hub focused on Easter Egg walkthroughs, map sections, and clean step-by-step progression. Built as a dark sci-fi editorial experience with reusable MDX content, responsive layouts, and a modern gaming-inspired UI.

AstroMDXTailwindReact
progress 22%

Shipped alongside great teams.

Walmart
Retail technology · performance & scalability
TaxAct
Fintech web platform modernization
Globant
Frontend consulting for global clients
Bluetab Solutions
Data & tech consulting
Pansophic Learning
Edtech platform improvements
Meta
UI systems & analytics (via Roundfeather)
// technical skills

The toolkit.

johar@dev — ~/toolkit
$ skills --list frontend
React.jsNext.jsVue.jsNuxt.jsTypeScriptReduxRedux ToolkitVuexPiniaa11yFigma
# 11 packages · exit 0
// let's work together

Got something to build?

Looking for a developer who combines technical vision with attention to detail? Let's talk.

Available for full-time remote roles