Selected work, before and after

Each case covers how the system was, what I did, and how it ended up, with the exact stack. No screenshots of client systems and no company names.

Chile · 2022 – 2023

B2B telecom channel

Context: Legacy applications in the B2B channel running critical sales and billing processes.
What I did: I optimized Java 8 and JSP components, integrated external APIs, and supported the development of new applications.

Stack: Java 8 · JSP · REST APIs

Argentina · 2022

Context: A transactional platform with purchasing, tendering, and user management processes.
What I did: Spring Boot backend services, frontend components, and REST APIs over PostgreSQL connecting the modules.

Stack: Spring Boot · React · PostgreSQL

2018

Stack: .NET · Angular · SQL Server · Azure

Mexico · 2021

Context: No existing system. A new platform, built from scratch, with profiles, applications, and voting.
What I did: Laravel backend, Vue frontend, and the data model for the voting workflow.

Stack: Laravel · Vue · MySQL