Software Engineer: automation, infrastructure, data.

Pragmatic by default the simplest thing that removes the manual work, then measured. Curious by habit: every job brings a tool I have not used yet, and learning it is part of the work.

"Nature is pleased with simplicity. And nature is no dummy"

• 2026

  Personal Blog

  Writing · solo

  A blog on software, mathematics and data: code that shipped, proofs that held, and the numbers that argued with both. Static pages written in plain HTML and CSS, generated by a TypeScript build and shipped in a Docker image.

  blog.josefranvargas.com ↗

  • TypeScript
  • HTML
  • CSS
  • Docker
• 2025

  Drawio File Converter

  Web tool · solo

  A web tool that converts .drawio diagrams to PNG, SVG or XML in batch, built on JavaScript, the embedded diagrams.net API and Docker. It processes whole folders or .zip archives client-side, with no server involved.

  Cuts conversion time by 90% against converting each diagram by hand.

  

  

  drawio.josefranvargas.com ↗

  • JavaScript
  • diagrams.net API
  • Docker

LANGUAGES

• C++
• Python
• Java
• TypeScript
• JavaScript
• PHP
• HTML
• CSS
• C#

INFRASTRUCTURE & CLOUD

• Bash
• Docker
• Kubernetes
• Terraform
• AWS
• Google Cloud
• Jenkins
• Git

LIBRARIES & FRAMEWORKS

• Angular
• .NET
• Spring Boot

DATA SCIENCE

• Power BI
• Excel
• Pandas
• NumPy
• Matplotlib
• Scikit-learn

DATABASES & NETWORKING

• MySQL
• PostgreSQL
• Cisco CCNA

Open to principal or staff-level work where the interface is the product. Slow to answer recruiters, quick to answer anyone with a hard constraint.