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Guillermo Guerra
Open to opportunitiesDeveloper
Junior full-stack developer building production React and Python web/mobile apps.
PortugalDeveloper at App & Systems
About
I’m a junior full-stack developer with hands-on experience building and shipping production web and mobile applications. I’ve built and published a mobile app (iOS & Android) on the App Store and Google Play, and I’ve delivered full-stack inventory dashboards with React / React Native and backend/API integration.
I’m solid in JavaScript, React, Next.js and Python, and I’m currently strengthening TypeScript. Coming from a technical-support background, I’m comfortable troubleshooting and solving problems quickly, and I enjoy working in remote, agile (SCRUM) teams.
In my recent roles at GST3D, I developed and deployed production features end-to-end: e-commerce sites (Shopify, WooCommerce), inventory dashboards, and API integrations, plus React/Next.js marketplace work. I’m motivated to keep growing as a developer while continuing to deliver reliable, customer-ready products.
Experience
Developer - App & Systems
Developed and deployed the GST3D mobile app for iOS and Android, publishing it on Google Play and the App Store. Built the gst3d.eu website and a full-stack inventory management dashboard with backend integration, including API integrations and custom JavaScript functionality for e-commerce platforms.
React NativeJavaScriptBackend IntegrationsAPI IntegrationFull Stack
Developer & Administrative Manager
Developed and maintained GST3D e-commerce websites using WooCommerce and Shopify, including custom JavaScript and front-end enhancements. Built an inventory dashboard with React/React Native and coordinated order processing across web, Amazon, and live channels.
WooCommerceShopifyJavaScriptReactReact NativeOrder ProcessingAmazon
Education
Self-taught / Independent study
Continues self-directed learning in JavaScript, React, and Python, including building algorithmic trading systems with pandas, NumPy, and FastAPI.
Alta Gracia High School
Earned a High School Diploma focused on management-oriented entrepreneurship.