Projects

All projects

Case studies from production engineering work across fintech, telecom, government, and Shopify SaaS.

Linkeum Wallet: a multi-currency fintech wallet in 30 days

Shipped a production fintech wallet in 30 days with a 2-engineer team — multi-currency, KYC, 2FA, real-time notifications. Built on Nest.js + Next.js Server Actions over a Turborepo monorepo.

Nest.js Next.js Turborepo PostgreSQL

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Fuel & Gas · Web + Android · External integration

A fuel and cooking-gas marketplace for Cuba, with QR pickup

Muévete y Cocina turns the daily scramble for fuel and cooking gas in Cuba into an order-ahead flow: browse nearby service centers and live prices, reserve litres or a gas cylinder, pay, and pick up against a QR. Since the team white-labelled it, the same codebase reaches customers under two selling brands, Mercaful and Gasolero. I proposed and built its offline-first Flutter courier app end to end, shipped heavily on the customer web app alongside the company's frontend lead and a designer, and over time took my work into the backend too: delivery evidence, access control, and per-brand legal documents.

Flutter React Router Vite TypeScript

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Side project · n8n · Agent · RAG

AI News Intelligence — n8n agent over FastAPI + Redis + SvelteKit

Personal side project: an AI agent that orchestrates news data via n8n, serves it through a FastAPI + Redis cache layer, and talks to users through a SvelteKit chat UI. Whole stack containerized with Docker Compose for one-command deploy.

FastAPI Python Redis Docker

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End-to-end ownership · Solo · 3 months

Ranfo: digitalizing a vehicle workshop end-to-end

Sole technical owner of an end-to-end vehicle workshop digitization — Django + Hetzner + Dokploy + Cloudflare. Non-breaking schema migration mid-flight to support multi-currency payments without losing a single record.

Django PostgreSQL Dokploy Hetzner

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Government · Mission-critical · Offline-first

Asistente Judicial en Línea: an offline-first Flutter app for the courts

A mission-critical Flutter field app for Cuban judicial assistants — write-first SQLite cache + contract-first REST + checkpointed delta sync — so a day offline in low-connectivity zones still ends with zero data loss.

Flutter Dart SQLite ERPNext / Frappe

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On-prem · Solo · Django + Flutter

L&M Tailoring: paper-to-digital workshop, end-to-end

Solo-engineered a centralized Django + PostgreSQL backend and Flutter mobile clients to replace 100% of L&M Tailoring's paper-based ordering and bookkeeping. Configured the on-prem LAN so the floor staff and the office synced in real time with zero data loss.

Django Flutter Dart PostgreSQL

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Telecom · National scale · Flutter

The Flutter app for the service 7M Cubans get online through

Cuba's national telecom needed one mobile surface for everything a subscriber touches — account, internet quota, captive portal auth. Built the Flutter app end-to-end against the legacy Java portals exactly as they were, with no backend rewrite to lean on.

Flutter Dart Java Spring Boot

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E-commerce · Flutter · Multi-brand

Cross-brand Flutter polish for three Pakkete Group storefronts

Pakkete Group ran a multi-brand Flutter e-commerce platform — Pakkete itself plus Carmelina for Cuba and Oliver for Miami. Joined for the pre-launch polish window: closing out UI bugs, optimizing performance, and aligning the final technical delivery with three different brand identities across one shared codebase.

Flutter Dart

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AI SaaS · Shopify · Remix.js MVP

Yula.ai: frontend for an agentic Shopify support product

Frontend for an agentic Shopify customer-service product — marketing landing + embedded Shopify app in one Remix codebase, integrated against a LangGraph + Pinecone + Redis backend. Shipped in 3 months; never launched publicly.

Remix.js Shopify App (Polaris + App Bridge) Clerk Prisma

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Edge · CV · QR auth

QR-based campus access control on Raspberry Pi

Engineered an automated, Linux-based campus access control system for CUJAE — Raspberry Pi nodes running Python + OpenCV scan QR-coded IDs at building entrances and verify identities against a Node-RED backend integrated with the Informatics department's central data.

Python OpenCV Node-RED Raspberry Pi

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Automation · HMI · OPC-UA · Thesis

Hospital hydraulic automation — undergraduate thesis (HMI + PLC)

Undergraduate thesis at CUJAE: a complete automation proposal for a pediatric hospital's hydraulic supply system, designed to replace a manual 6-hour pump cycle with an autonomous software-driven solution. Built a functional HMI in Python/KivyMD and validated the control logic via OPC-UA against industrial PLCs in a simulated environment.

Python OpenCV Linux

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Community ops · Xenforo · TeamSpeak

Esteria no Sekai: community ops for a Cuban anime/gaming forum

Built and ran the Xenforo forum and TeamSpeak voice servers behind Esteria no Sekai — a Cuban anime/gaming community. Designed the categories, the channels, the moderation. Through COVID, kept the platform alive and ran virtual social programs that turned it into a place people came back to.

Xenforo WordPress PHP MySQL

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