Professional portfolio · juantzun.dev
Senior Full Stack Engineer with 6+ years of professional experience building, optimizing, and maintaining scalable enterprise applications using Java, Spring Boot, React, Angular, and relational databases. Experienced in designing REST APIs, developing microservices, optimizing high-volume SQL workloads, and delivering end-to-end features in distributed teams. Proven track record troubleshooting production systems, resolving critical issues under pressure, and collaborating across technical and business teams. Currently expanding expertise in cloud technologies, Docker, and CI/CD practices while continuously adopting modern engineering approaches and emerging technologies.
6+
years of experience
Java
robust backends
Angular
productive frontends
React
reactive frontends
AI
RAG and agents
Each project is designed to showcase full-stack architecture, product thinking, deployment, data, applied AI, and real-world problem solving.
Operational management platform for small rental businesses: reservations, maintenance, purchases, inventory, documents, and an AI assistant.
AI-powered document management system with permissions, semantic search, RAG, and a chatbot over business documents.
Platform for processing and visualizing massive electoral datasets with batch pipelines, dashboards, and monitoring.
Platform for visibility into deployments, pipelines, errors, incidents, and engineering team metrics.
AI agents connected to real tools through MCP, designed to automate technical and operational workflows.
Laboratory for SQL query analysis, execution plans, index recommendations, and performance comparison.
Modern ERP based on a real system: inventory, billing, credits, permissions, reports, auditing, and an AI assistant.
