fjmg84 | Fidel Miranda

About

About Me

Get to know the developer behind the projects.

Introduction

Passionate about web design and development, committed to offering innovative and effective solutions for each project.

With a strong focus on performance optimization and test automation, I have delivered high-quality frontend solutions across multiple projects.

Frontend Performance Testing

Career

Work Experience

The roles and teams that shaped the way I build software today.

2024 — present Currently here

TETRAIMPACT

Frontend Developer

Developed scalable frontend solutions across multiple projects using Next.js, Remix, Material UI, and Prisma. Focused on intuitive UX, performance optimization, and test automation with Jest/Vitest, while improving delivery through modular architecture and process refinements.
2021 — 2022

DSPOT

Frontend Developer

Built design-driven interfaces with Next.js and TypeScript, strengthening UI craftsmanship with CSS and Sass. Collaborated closely with design in Figma to translate detailed layouts into polished, production-ready UIs and faster iteration cycles.
2014 — 2021

EMCOMED

Network and Server Administrator | Application Development

Managed a segmented Linux/Windows infrastructure for 100+ users while also building internal business tools. Delivered PHP/Express/React apps integrated with MSSQL/MySQL, optimized server performance, improved data workflows, and automated repetitive processes.

Toolbox

Skills

The technologies I reach for to ship fast, scalable, production-grade interfaces.

01

Core

CSS3
HTML5
JavaScript
TypeScript

02

Frameworks/Libraries

Astro
NextJS
ReactJS
Redux
Zustand

03

Stylized

MaterialUI
SASS
Styles Component
Tailwind

04

Backend & Tools

Git
Graphql
Jest
NodeJS
Playwright
Prisma
Vitest

05

integrations

AWS
Cloudflare
Docker
n8n
Vercel

Selected Work

Some Projects

A few projects I've designed, built, and shipped from start to finish.

01

snap-assets

A platform that lets you generate high-quality visual assets—from blog thumbnails to certificates and coupons—simply by filling out a form or using a dynamic API. Choose a template, customize the colors, and download your ready-to-publish PNG.

JavaScript NextJS Tailwind TypeScript Vercel

View Site
02

work-tracker

A desktop app to track your work hours and GitHub activity in one place. Link your repositories to projects, start and stop sessions with a timer that automatically detects inactivity. View your pull requests and commits by month, generate monthly CSV reports, and now you can also create AI-powered pull request descriptions in one click, in Spanish or English.

electron react Tailwind TypeScript

GitHub
03

f-resources

Curated resource hub for web developers and designers, organizing tools, docs, and learning materials in a clean, searchable UI. Built to surface high-quality references quickly and reduce time spent hunting for links.

CSS3 Graphql HTML5 JavaScript NextJS TypeScript Vercel

View Site
04

MiEconomia

It's a website for managing your personal finances with the help of AI that provides reports based on your income and expenses. You can ask it to give you a financial overview and recommendations. It also includes a guide on how to use it correctly.(Actually, it's a project in migration to Next.js, but you can check the repository to see the progress).

Astro chart.js HTML5 JavaScript ollama-ia Tailwind TypeScript

GitHub
05

no-self-recursive-jsx

ESLint rule that prevents React components from rendering themselves recursively, avoiding infinite loops and unexpected behaviors.

eslint JavaScript

GitHub