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Full stack developer

RománValles

I build modern, maintainable, and high-performance software.

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Selected work // 06 entries

01. Selected work

Projects

Real products: the problem, technical decisions, and outcome behind each project.

  1. Case file 01GhostWorkers
    01

    GhostWorkers

    Full-stack product

    View case
  2. Case file 02Huellitapp
    02

    Huellitapp

    Lost pet search

  3. Case file 03Burger03
    03

    Burger03

    Digital menu and administration

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  4. Case file 04Plataforma de Trading
    04

    Plataforma de Trading

    Trading and education

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  5. Case file 05Andromeda
    05

    Andromeda

    Freelance services

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  6. Case file 06iMovie
    06

    iMovie

    Movie discovery and watch tracking

    Explore product

02. Public repositories

Open Source

Tools, experiments, and packages built to be shared.

  1. PUBLIC MODULE / 01

    VulnScanner

    A Node.js tool for scanning ports and analyzing HTTP headers of domains or IP addresses, focused on basic attack surface analysis in authorized environments.

    • Node.js
    • Ports
    • HTTP
    • Cybersecurity
    JavaScriptSTARS --FORKS --LICENSE --
    View repository

  2. PUBLIC MODULE / 02

    Packet Sniffer

    A Python network sniffer for capturing real-time traffic from the terminal, designed for educational use and basic network analysis.

    • Python
    • Networking
    • CLI
    • Education
    PythonSTARS --FORKS --LICENSE --
    View repository

  3. PUBLIC MODULE / 03

    Traffic Dashboard

    A local real-time network traffic dashboard using Node.js, tcpdump, and Socket.IO, with a Tailwind CSS interface. Focused on protocol analysis and defensive cybersecurity; Chart.js visualizations are in development.

    • Node.js
    • tcpdump
    • Socket.IO
    • Tailwind CSS
    JavaScriptSTARS --FORKS --LICENSE --
    View repository

// About me

About me

Full stack developer · Santa Fe, Argentina

Full stack developer with over four years of experience building modern web applications with React, Next.js, Node.js, and TypeScript.

I work end to end across interfaces, APIs, authentication, data, and deployments, focusing on maintainable, secure, and high-performance solutions.

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Low-poly illustration of a developer sitting on a car in a retro landscape
Avatar environment // Personal archive 02

// Professional path

Experience

Roles, challenges, and decisions that shaped my professional journey.

03recorded stages

  1. —Present

    Cosmind IT Partner

    Full stack developer

    Santa Fe, Argentina

    Current

    I develop end-to-end web applications with Next.js, Firebase, and Tailwind CSS, integrating authentication, Mercado Pago payments, and cloud services on AWS and Google Cloud Platform.

    • Next.js
    • Firebase
    • Tailwind CSS
    • Mercado Pago
    • AWS
    • GCP

  2. —

    Axelia Cybersecurity

    Full stack developer

    Temporary project · Barcelona, Spain

    I modernized internal cybersecurity tools by migrating the frontend from Buffalo/Go to Next.js and introducing Docker, technical dashboards, and more maintainable analysis workflows.

    • Next.js
    • Go
    • Docker
    • CI/CD

  3. —

    A3 Sports

    Full stack developer

    Freelance · Buenos Aires, Argentina

    I built a platform for sports content analysis and multimedia management, integrating Firebase authentication, the YouTube API, and a responsive Tailwind CSS interface.

    • Next.js
    • Firebase
    • Tailwind CSS
    • YouTube API

// Working stack

Skills

Technologies and practices that are part of my everyday work.

  • Frontend

    Interfaces and component architecture.

    06 items
    • TypeScript
    • JavaScript
    • React
    • Next.js
    • Astro
    • Tailwind CSS

  • Backend & Data

    APIs, services, and data persistence.

    08 items
    • Node.js
    • Python
    • SQL
    • NestJS
    • Express
    • REST APIs
    • PostgreSQL
    • MongoDB

  • Quality & Product

    Testing, design, and web performance.

    03 items
    • Vitest
    • Figma
    • Lighthouse

  • Infrastructure & Tooling

    Containers, version control, and assisted tooling.

    05 items
    • Docker
    • Git
    • GitHub
    • OpenCode
    • Codex CLI

// Professional education

Education

Academic education and complementary training that support my professional practice.

Formal education

Instituto Superior N.º 25 Beppo Levi

Advanced Technician in Software Development

Santa Fe, Argentina —

Complementary training

  1. Codearock

    • UX Definitivo
    • Firebase
    • React
    • Next.js
    • Fullstack SummerHack 2023

  2. Cisco Networking Academy

    • Networking Basics
    • Introduction to Cybersecurity

  3. Codo a Codo 4.0

    • UX/UI Design

Let's talk

Have an idea, a product, or an interesting challenge? We can build something worth remembering.

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