Juan David Zea

Software developer · Systems Engineer

Profile

Systems Engineer with 6 years building interfaces. Today I build a payment gateway's checkout and the company's design system, and I build with AI agents. I work with Claude Code and build tools so agents can do real work. I believe in SOLID, TDD and using AI with judgment.

Experience

Senior Frontend Engineer· Placetopay — Evertec Inc.

Feb 2021 – present · 5 years

I build and maintain the checkout page of Placetopay's payment gateway, which processes transactions across Latin America.

I created Spartan Vue, the company's design system, and I'm its top contributor.
I created the open-source icon, flag and lightbox libraries its products use in production.
I've taught internal programming courses to the team.

Vue · TypeScript · TailwindCSS · Nuxt · PHP · Laravel

Freelance developer

Freelance

Custom software for a furniture store: sales, inventory, invoicing and reports.

JavaScript · Node · SQL

Projects

PTP Studio · My own tool

A web client I built to test Placetopay's payment APIs (over 36 endpoints), with a Chrome extension that mocks the checkout's responses and an MCP server so an AI agent can drive it.

MCP: 2,315 downloads/yr · v0.7.1 ptp-studio.juanzea.com

Spartan Vue · Design system

Placetopay's design system: Vue components on TailwindCSS v4, documented and versioned, used in production.

774 of 1,204 commits · 296 versions · 17,739 downloads/yr · v3.1.1 placetopay-org.github.io/spartan-vue/es

Iconsax Vue · Icons

Over a thousand Iconsax icons as Vue components, in six styles, that only weigh what you import.

62,535 downloads/yr · v1.0.0 placetopay-org.github.io/iconsax-vue

Flagicons Vue · Flags

Countries' flags as Vue components, in three sizes.

6,811 downloads/yr · v0.1.0 placetopay-org.github.io/flagicons-vue

Lightbox SDK · SDK

Opens websites in a modal iframe and talks to them, with configurable styles and behavior.

3,492 downloads/yr · v2.6.0 placetopay-org.github.io/lightbox-sdk

SimpleMoneyConverter · API

Currency conversion API with historical rates and batches of up to 100 requests.

github.com/JuanZea/SimpleMoneyConverter

What I work with

Frontend: Vue, Nuxt, Svelte, React, Astro, TypeScript, JavaScript, TailwindCSS, CSS, HTML
Backend & data: Node, Laravel, PHP, SQL, Drizzle, NeonDB, Supabase
AI: Claude Code, Claude, MCP, Gemini, OpenAI
Infrastructure: Cloudflare, Vercel, Git, pnpm
Practice: SOLID, TDD, Vitest, OOP, SCRUM, Design patterns

Education

Systems Engineer
University of Antioquia