Sheet 01/03Jan 2025 – Dec 2025

Full-Stack Engineer / Developer

Financiera Atlas · El Salvador

Built the foundations of the financial system: transactional microservices and the collections team's mobile app.

8field collectors used the app I built end to end every day: backend, database and mobile

01The collections mobile app was all mine, end to end: its microservice, the MySQL database and the React Native app, with reporting and real-time geolocation.
02On the core system: transactional microservices with Spring Boot and FastAPI; MySQL as the main engine and MongoDB for specific needs.
03Contributed to the web admin platform with React and Angular.
04Containers with Docker, orchestration with Kubernetes and testing with JUnit and Vitest.

What I took with me

Sheet 02/03Jan 2026 – Mar 2026

Full-Stack Software & DevOps Engineer

Textiles de Opico (TexOps) · Santa Ana, El Salvador

Modernised the backend, frontend and infrastructure, and set up CI/CD from scratch.

~7 sto extract the data from a ~10-page design PDF; before, an AI tool took ages and failed

01I got to design my own microservices, with Spring Boot and .NET, plus FastAPI utilities; I designed the SQL Server tables and views for each one.
02A Python microservice that reads the garment design PDFs from the Embellishment department (about 8 a week) and fills the tables that management and the department head rely on. Before, they uploaded them to an AI tool: very slow and unreliable.
03Rebuilt the lab module: from static Java pages to a React app, much faster and with no page reload after every change.
04Migrated the servers from Windows to Linux and moved the whole ecosystem to Docker.
05Led the frontend: the move to React single-page apps.
06Pipelines with tests (JUnit, Vitest), linting, SonarQube, Docker images and automated deployment, with no manual steps.
07Token-based authentication and monitoring with Prometheus and Grafana.

What I took with me

Sheet 03/03Apr 2026 – Oct 2026

Enterprise Database Corporation (EDC) · Remote

Core billing and hospital management system: new features, high-load SQL Server and deployment automation.

−99 %fewer logs a month in the system, after auditing what my analyser brought to light

01New features and support in C#, .NET Framework / .NET Core, Web Forms and Windows Forms.
02Designed, refactored and debugged stored procedures, views and functions in SQL Server under heavy transactional load.
03Bulk ingestion of billing and medical records with bulk inserts, cutting processing times sharply.
04A log analyser in Python: it processes the month's logs, groups them by type and frequency, gives each a unique ID and builds a dated report. The team stopped reading logs and started fixing from the list.
05Python scripts that generate the deploy and rollback SQL for DML and DDL changes across DEV, QA and UAT; lifecycle in Azure DevOps.

What I took with me

Where to next?

Three companies, three different sectors. At each one I built, modernised or automated something that is still running in production.