Open to opportunities

Ronald Martinez User

@ronaldmartinezuser

Message

I build secure Linux infrastructure, REST APIs, and full-stack web applications.

El Salvador

Message

What I'm looking for

I'm looking to grow in full-stack development, Linux and cloud infrastructure, automation, and security-focused technical work while contributing practical experience in crypto, servers, and troubleshooting.

I've deployed and secured Ubuntu VPS environments on Azure, configuring Nginx, Certbot HTTPS, Cloudflare DNS, UFW firewalls, SSH authentication, RAID, LVM, and swap storage.

As a self-employed Technical Solutions Specialist since 2021, I build REST APIs with Node.js, Express, PostgreSQL, MongoDB, and Prisma, while automating server operations and file-processing tasks with Bash and Python.

I also support clients across crypto wallet security, exchange operations, and on-chain transaction troubleshooting, drawing on more than five years in the cryptocurrency ecosystem.

I'm currently studying Systems Engineering and expanding my work in React, TypeScript, cloud infrastructure, Python automation, and foundational machine learning.

Experience

Work history, roles, and key accomplishments

Current

Freelance Technical Solutions Specialist

Current

Self Employed

Jan 2021 - Present (5 years 7 months)

Provided freelance technical solutions including Linux server administration, full stack development, automation, crypto consulting, and IT support. Deployed and secured production servers, built REST APIs, and automated system tasks.