Hi, I'm Andrés Santos

El Salvador · Remote for the US (GMT-6)

About me

Education

Systems Engineer — Universidad de El Salvador (UES) · 2021

I'm Andrés Santos, a Systems Engineer (UES, 2021) with 4+ years in tech and 2+ years building end-to-end custom software: SaaS, POS and e-commerce. I currently develop for a US-based company, where as the sole developer I designed and shipped a POS and inventory system serving 5 points of sale.

For JC Barber & Beauty Supply I built the platform that now runs its 5 points of sale, and launched its online store. I specialize in NestJS, React, TypeScript and PostgreSQL, and I love turning manual processes into automated, scalable software.

Education

Systems Engineer — Universidad de El Salvador (UES) · 2021

Frontend

React
TypeScript
Next.js
Astro
Tailwind CSS

Backend

NestJS
Node.js
PostgreSQL
TypeORM · Prisma
REST APIs · JWT

Tools

WordPress · WooCommerce
Square (payments)
Docker
Git · GitHub
Retail POS: SalePro · Lightspeed · Kyte
AI-assisted development

Journey

From automating spreadsheets to shipping systems to production.

Jul 2024 — presente

Work
Jul 2024 — presente · Work

Software Developer

JC Barber & Beauty Supply — Florida, USA Current

Designed and built from scratch, as sole developer, a custom POS and inventory system that unified two disconnected platforms (Lightspeed in stores, Kyte in mobile units) into a single source of truth for 5 points of sale (~15 active users): 5,000+ SKUs, 100+ clients, automated counts and full traceability. Also built and launched the company’s online store with Square payments.
- NestJS
- React
- TypeScript
- PostgreSQL
- WooCommerce
- Square
Jul 2022 — Jul 2024

Work
Jul 2022 — Jul 2024 · Work

Technical Support

JC Barber & Beauty Supply — Florida, USA

The team’s technical go-to: automated spreadsheets to cut manual work, managed invoicing and data cleanup, and trained users on Excel and retail/POS systems (SalePro, Lightspeed, Kyte) — the first step toward custom software.
- Excel
- SalePro
- Lightspeed
- Kyte
Ago 2019 — Jun 2020

Work

Ago 2019 — Jun 2020 · Work

Technical Support Intern

Instituto Nacional Ernesto Flores — El Salvador

University social service: hardware maintenance and repair, software installation and setup, network and inventory management, and training for teachers and students.
— 2021

Education

— 2021 · Education

Systems Engineering

Universidad de El Salvador (UES)

Full degree, graduated in 2021 via a specialization course in Networking. Solid foundation in software design, databases and systems architecture.

Selected projects

Complete, working products: e-commerce, bookings, contract signing and more.

(09) Projects

In production — real systems

Private code Real project

JC Barber System

Custom POS & inventory for JC Barber & Beauty Supply (USA): 5 unified points of sale, 5,000+ SKUs and ~15 active users.
- React
- NestJS
- TypeORM
- PostgreSQL
- Radix UI
View case study
Live Real project

jcbarberstore.com

E-commerce in production for JC Barber & Beauty Supply (USA): WooCommerce store with Square payments and active sales.
- WooCommerce
- WordPress
- Square
- PHP
View case study Visit site

Apps — personal projects

2026

Jugasaro Store

Full-stack e-commerce with admin panel: catalog, cart, orders and full management.
- NestJS
- Next.js 15
- Prisma
- PostgreSQL
- Turborepo
View more Code
2026

Joansaro Contratos

Contract e-signature system: field editor, digital signing and certified PDF output.
- Next.js 15
- Prisma
- SQLite
- pdf-lib
- Server Actions
View more Code
2026

IRONHAUS Gym

Gym class booking with a real backend: live availability and capacity rule.
- NestJS
- React
- TypeORM
- PostgreSQL
- TanStack Query
View more Code