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Juan Guijarro Ferreiro
juan.jpg

Juan Guijarro Ferreiro

Elixir Full Stack Developer

Introduction

I’m a Software Engineer driven by curiosity, with a diverse background in musicology, acoustics, and physics. For over six years, I developed tailored solutions for an engineering team, managed infrastructure, and optimized workflows at a renewable energy cooperative. Working in a dynamic environment, I gained extensive experience in back-end development, primarily using Python and JavaScript, along with Docker and CI/CD pipelines for deployments on Google Cloud Platform and AWS.

Currently, I work as an Elixir Full Stack Developer, building and operating high-throughput data ingestion systems for eCommerce search. I develop integrations for major eCommerce platforms, handling real-time product updates and complex data transformations. My work focuses on concurrency, scalability, and reliability, and I’m responsible for systems across their full lifecycle—from development to deployment, monitoring, and performance optimization in production.

My skills

Analytical thinking
Continuous learning
Critical view

Technologies and tools

I master

  • Ansible
  • AWS
  • Docker
  • Elixir
  • Fastapi
  • Git
  • Github
  • Github Actions
  • GitHub Actions
  • Go
  • Google Apps Script
  • Google Cloud
  • JavaScript
  • Kubernetes
  • Python
  • SQL

I want to work with

  • C
  • Clojure
  • Elixir
  • Haskell
  • Numpy
  • PyTorch
  • Rust
  • TensorFlow

Languages

Catalan / Valencian
Native/Bilingual
Spanish
Native/Bilingual
English
Native/Bilingual

Interesting facts about me

Music & Performance

As a musicologist, I have written concert program notes for the Castilla y León Symphony Orchestra for several years. I have been part of various choirs throughout my life, and in 2017, I co-founded the vocal group Tag Time, where I currently sing.

Geeky stuff

I have a deep passion for physics and science outreach, especially astronomy. I currently hold the Starlight Astronomy Monitor certification.

Mountaineering & Climbing

I have been climbing as my main sport for over a decade, and I spend much of my free time in the mountains. Since 2026, I am a certified Mountain Guide (TD2).

NGOs & International Cooperation

Much of my personal and professional journey has been dedicated to nonprofit organizations and international cooperation, including my work at the International Cooperation Office of the University of Valladolid and the Secretariat of Oilwatch International in Quito, Ecuador.

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