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Available for remote roles

Senior Full-Stack Engineer

Juan Ignacio
Zapata

Backend · IoT · AI Integration

I build production-grade systems — from real-time IoT platforms to LLM-powered internal tools. Based in Dubai, working remotely worldwide.

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Experience

Where I've worked

Lead Software Engineer — Full-Stack

ZETACE SA · San Nicolás, Argentina (Remote) · Jan 2023 – Present
  • Architected a multi-tenant SaaS platform serving 1,000+ active users, load-tested to 1M+ requests with Locust.
  • Built high-performance REST APIs with Python/FastAPI and PostgreSQL/SQLAlchemy, owning the full product lifecycle end-to-end.
  • Engineered real-time industrial IoT telemetry pipelines via WebSockets for live GPS and sensor monitoring.
  • Deployed an internal AI assistant using Ollama (LLaMA), LangChain RAG, FastAPI and React — containerized with Docker/Dokploy.
  • Managed full DevOps lifecycle: Linux servers, Docker, Nginx, CI/CD, mailing systems and multiple corporate websites.
PythonFastAPIReactPostgreSQLDockerIoTLangChain

Full-Stack & Mobile Developer

901 Monitoring Station SA · La Plata, Argentina · Nov 2024 – Feb 2026
  • Led development of a unified security ecosystem — mobile apps, backend, and command center — as sole engineer with full ownership.
  • Built cross-platform React Native (Expo) apps with live CCTV streaming, GPS tracking and IoT hardware control.
  • Architected a real-time Firebase backend for high-availability security operations.
  • Built high-throughput microservices with Bun.js to process large volumes of event-driven security telemetry.
React NativeFirebaseBun.jsReactIoT

Automation Engineer & Electrical Designer

SDS – Smart Drawing Services · Auckland, NZ (Remote) · Jan 2021 – Jan 2023
  • Built Python tools that auto-generated AutoCAD Electrical schematics from structured Excel inputs.
  • Designed Pandas/OpenPyXL data pipelines and web scraping workflows for technical data consolidation.
PythonPandasAutoCADAutomation

Projects

Things I've built

Internal AI Assistant (RAG)

LLM-powered natural language interface for internal company data

PythonLangChainOllama +5
View details →

SaaS Census Management Platform

Multi-tenant platform serving 1,000+ users, load-tested to 1M+ requests

PythonFastAPIPostgreSQL +5
View details →

Industrial IoT & GPS Telemetry Platform

Real-time sensor data and GPS tracking via WebSocket streaming

PythonFastAPIWebSockets +5
View details →

Unified Security Monitoring Ecosystem

Mission-critical platform: mobile apps, backend, and operator command center

React NativeExpoFirebase +5
View details →

Skills

My tech stack

Languages

PythonTypeScriptJavaScriptSQLBashC++

Backend & APIs

FastAPINode.jsBun.jsPostgreSQLRedisRabbitMQSQLAlchemyFirebase

AI & Data

LangChainOllamaRAG PipelinesPandasNumPyScikit-learn

Frontend & Mobile

ReactReact Native (Expo)PreactVite

Infrastructure

DockerDokployAWSNginxLinuxCI/CD

Architecture

MicroservicesEvent-DrivenWebSocketsREST APIsIoT ProtocolsServerless

About me

The person behind the code

Your photo here
Dubai, UAE

I'm a Senior Full-Stack Engineer with a background spanning industrial IoT, SaaS platforms, mobile applications, and applied AI. What sets me apart is the combination of strong mathematical foundations — three years studying Astronomy — with deep hands-on engineering across the full product lifecycle.

I work best as a technical owner: whiteboard to production, managing architecture, backend, frontend, infrastructure, and DevOps. I've done this as a sole engineer reporting directly to business stakeholders, which means I'm comfortable with ambiguity and autonomous decision-making.

Currently based in Dubai, targeting remote roles at high-growth companies where I can build at the intersection of robust backend engineering and AI-integrated products.

Based in Dubai, UAE
Spanish (native) · English (fluent)

Let's talk

Open to remote roles, freelance projects, and technical collaborations.

juanignaciozapata96@gmail.com
LinkedIn — Juan Ignacio Zapata
GitHub — zapatajuani