Alejandro Chávez — Full-Stack Developer & AI Engineer

Portfolio of Alejandro Chávez, full-stack developer and AI engineer from Venezuela. SaaS products, AI agents and automations with React, Next.js, NestJS, Supabase and n8n.

About me

  • 3+ years of experience
  • 20+ projects in production
  • Full Stack Developer
  • AI & Computer Engineer
  • From Venezuela: born in Caracas, now in Valencia

Projects

Pickop

Full-Stack · 2026

SaaS for restaurants: WhatsApp and online-store orders with one menu and a single queue.

I built the system end to end: from the frontend to the backend and its release to production.

  • I built a multi-tenant SaaS so each restaurant can sell through WhatsApp and its own online store.
  • I merged orders from both channels into one live queue, each tagged with its source channel.
  • I integrated the official WhatsApp Business API with an AI assistant that hands off to a human.
  • I designed a single menu for both channels: a sold-out dish disappears from both at once.
  • I added opening hours, holidays and scheduled orders, with automatic replies after hours.

Stack: Next.js, React, Supabase, WhatsApp Business API, OpenAI, Tailwind CSS, GSAP

Website

Roda

Full-Stack · 2026

Auto repair shop system: photo check-in, quotes, billing and history, online or offline.

I owned the whole product, from the interface to the server-side logic, and kept it running in production.

  • I built an offline-first flow so the shop keeps working without signal and syncs when back online.
  • I designed vehicle check-in with photos, marked damage and a signature to settle disputes early.
  • I built quotes the customer approves line by line from a link, without logging in.
  • I stored the day's exchange rate on each payment and split VAT and IGTF so the till balances.
  • I built per-vehicle history and a live status of every bay for advisors and customers.

Stack: Next.js, React, Tailwind CSS, Vite

Website

Botinfy.com

Landing · Demos · 2025

Landing page for Botinfy, an enterprise AI company, and its demos site (demo.botinfy.com).

I built the company's landing page and the demos site used to show the products to clients.

  • I built the corporate landing in React with GSAP animations and SEO/Open Graph metadata.
  • I structured the presentation of the company's five products around a single core.
  • I deferred third-party analytics and pixels so they do not hurt page performance.
  • I built the demos site in Next.js, with an onboarding flow per sector: e-commerce, retail or industrial.

Stack: React, Next.js, Vite, Tailwind CSS, GSAP, Radix UI

Website

Encuéntralos VZLA

Backend · Data · 2024

Emergency platform to report and locate children during an earthquake in Venezuela.

I worked on the backend: modelling the database and handling the data behind the site.

  • I modelled the reports database in Supabase, keeping the public view apart from contact data.
  • I built Edge Functions to create reports and reveal contact details only on request.
  • I validated submissions with Cloudflare Turnstile to stop spam and automated reports.

Stack: Supabase, PostgreSQL, React, Cloudflare Turnstile

Website

Mediart

Dev Support · 2025

Media platform to organise music, films, series, books and video games into playlists.

I supported the team during development, fixing specific issues and helping ship features.

  • I set up the Vitest test suite, with mocks for Nuxt, localStorage and fetch.
  • I configured ESLint and a GitHub Actions workflow that runs tests and lint on every change.
  • I added error handling for profile picture loading across six views so the UI never breaks.
  • I reworked the mobile layout and Studio navigation so the app works well on phones.
  • I polished the interactivity of buttons and selects across Studio, Search, Profile and Library.

Stack: Nuxt, Vue, Tailwind CSS, Vitest, GitHub Actions, Express, PostgreSQL

Website · Source code

Drinkers

Frontend · E-commerce · 2024

Liquor sales web system: online store plus an inventory, orders and reports admin panel.

I designed and built the store frontend, focused on presenting the catalogue clearly.

  • I built the store frontend: home, catalogue, product page and related products.
  • I built the side cart and a step-by-step checkout ending with the payment receipt upload.
  • I created the FAQ, About us, Terms, Privacy and Returns pages.
  • I added an animated header, side menu and a WhatsApp shortcut to contact the store.

Stack: JavaScript, Vite, CSS, EJS, Express, MySQL

Source code

Pago Móvil Manager

Full-Stack · 2026

Mobile payments manager for Venezuelan SMEs: OCR capture, roles and analytics.

I built the full application to record and organise mobile payments in one place.

  • I built receipt scanning with Gemini so payments are recorded without typing them.
  • I built the multi-company model with five roles and an audit log for teams.
  • I integrated the day's BCV rate for Bs/USD conversion and flagged duplicate payments.
  • I built financial, per-bank and risk KPI dashboards, with CSV, PDF and JSON export.
  • I packaged the app for Android with Capacitor and a workflow that builds the APK automatically.

Stack: React, TypeScript, FastAPI, Python, Supabase, Google Gemini, Capacitor

Source code

Restaurant System

Full-Stack · 2024

Management system for the Bistrot restaurant: inventory, HR, purchasing, kitchen, sales and more.

I took part in building the system, developing the Maintenance module and its reports management.

  • I built the Maintenance module views: main page, contact page and sidebar.
  • I built the reports section: table, detail view, drafting and deletion.
  • I migrated the HTML/CSS mockups to EJS templates within the project's structure.
  • I connected the views to the API with fetch and started the Express controllers.

Stack: Node.js, Express, EJS, MySQL, JavaScript

Source code

Charlotte Bistró

Programmer Analyst · 2024

Management web suite for Charlotte Bistró: delivery, KPIs, customer service, security and kitchen.

As programmer analyst, I took the system from requirements to design: elicitation, modelling, testing and documentation.

  • I gathered requirements with the business and turned them into use cases and user stories.
  • I modelled the system with UML diagrams and the database entity-relationship model.
  • I designed test cases and validated each delivery against the agreed requirements.
  • I documented the system: requirements specification and technical docs for the team.

Stack: UML, Modelo ER, Casos de uso, Casos de prueba

Website · Source code

Tech stack

  • Next.js (Frontend)
  • React (Frontend)
  • Vue.js (Frontend)
  • Angular (Frontend)
  • NestJS (Backend)
  • Supabase (Data)
  • Expo (Mobile)
  • Capacitor (Mobile)
  • Kotlin (Mobile)
  • Claude (AI)
  • MCP (AI)
  • n8n (Automation)
  • Docker (DevOps)
  • Nginx (DevOps)
  • Cloudflare (DevOps)
  • Git (DevOps)
  • TypeScript (Language)
  • JavaScript (Language)
  • Python (Language)
  • Java (Language)

Experience

  1. Botinfy — Development Manager

    Work · · Venezuela · On-site

    Leading product development, databases and DevOps.

  2. Botinfy — AI Agent Developer & Support

    Work · · Valencia, Carabobo · Hybrid

    Built AI agents and n8n automations for clients.

  3. Freelance — Full Stack Developer

    Freelance · · Remote

    Web apps for clients, from design to deploy.

  4. UJAP — Computer Engineering

    Education · · Universidad José Antonio Páez · Carabobo, VE

    Engineering degree in Computer Engineering.

Contact