Edwin Gerardo Vásquez Guerrero

01By the numbers

running systems in production

2 yearsrunning systems in production

industries: finance, manufacturing and healthcare

3industries: finance, manufacturing and healthcare

open-source tool released

1open-source tool released

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

Atlas8field collectors used the app I built end to end every day: backend, database and mobile

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

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

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

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

02Experience

1. Apr 2026 – Oct 2026

   Remote

   Full-Stack Software Engineer · Enterprise Database Corporation (EDC)

   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

   • New features and support in C#, .NET Framework / .NET Core, Web Forms and Windows Forms.
   • Designed, refactored and debugged stored procedures, views and functions in SQL Server under heavy transactional load.
   • Bulk ingestion of billing and medical records with bulk inserts, cutting processing times sharply.
   • A 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.
   • Python scripts that generate the deploy and rollback SQL for DML and DDL changes across DEV, QA and UAT; lifecycle in Azure DevOps.

   • C#C#
   • .NET.NET
   • WFWeb Forms
   • WinFWindows Forms
   • SQLSQL Server
   • Python
   • AzDOAzure DevOps

2. Jan 2026 – Mar 2026

   Santa Ana, El Salvador

   Full-Stack Software & DevOps Engineer · Textiles de Opico (TexOps)

   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

   • I 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.
   • A 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.
   • Rebuilt the lab module: from static Java pages to a React app, much faster and with no page reload after every change.
   • Migrated the servers from Windows to Linux and moved the whole ecosystem to Docker.
   • Led the frontend: the move to React single-page apps.
   • Pipelines with tests (JUnit, Vitest), linting, SonarQube, Docker images and automated deployment, with no manual steps.
   • Token-based authentication and monitoring with Prometheus and Grafana.

   • Spring Boot
   • .NET.NET
   • Python
   • SQLSQL Server
   • React
   • Docker
   • SonarQube
   • Grafana

3. Jan 2025 – Dec 2025

   El Salvador

   Full-Stack Engineer / Developer · Financiera Atlas

   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

   • The 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.
   • On the core system: transactional microservices with Spring Boot and FastAPI; MySQL as the main engine and MongoDB for specific needs.
   • Contributed to the web admin platform with React and Angular.
   • Containers with Docker, orchestration with Kubernetes and testing with JUnit and Vitest.

   • Spring Boot
   • FastAPI
   • MySQL
   • MongoDB
   • React Native
   • Angular
   • Kubernetes

03Works

• Multi-tenant SaaS · personal projectUnder construction

  ERP for construction companies

  A platform to run construction projects: projects, sites, staff, assignments and permits. The differentiator: Revit integration to pull quantities and materials straight from the drawings.

  5 services12 containers700+ tests

  • Java
  • Spring Boot
  • Spring Cloud Gateway
  • Python
  • FastAPI
  • Next.js
  • PostgreSQL
  • Redis
  • Flyway
  • Docker
  • Prometheus
  • Grafana
  • GitHub Actions
• Security tool · open sourceReleased

  Shorwatch

  A static analyser (SAST) in Rust that finds cryptography vulnerable to quantum computing in source code and suggests how to migrate to NIST's post-quantum standards.

  v0.2 released145+ rules17 algorithms

  • Rust
  • ASTtree-sitter
  • YAML
  • Docker
  • GitHub Actions
  github.com/ErwinQuantum/shorwatch
• Desktop app · for law firmsDefining architecture

  Court hearing transcriber

  A desktop app that transcribes court hearings without the audio ever leaving the office: who said what and at which minute, ready in Word. Transcription is the core; the firm's cases and files will grow around it.

  0 recordings leave the office2 modes: local or server

  • WhWhisper
  • Ollama
  • WWord (.docx)
• Independent collaboration · civil engineeringActive service

  Revit modelling and documentation

  I join a project's team to complete its Revit model: I add elements, finish drawing and detailing the sheets and, when needed, run calculations. Every delivery comes with a document of what I did, how and why.

  • Revit
  • AutoCAD