Case studies from production engineering work across fintech, telecom, government, and Shopify SaaS.
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.
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.
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.
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.
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 on top of the Spring Boot backend the team was migrating to.
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.
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.
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.
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.
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.
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.
