Hello, I'm Gabriel Arruda

I'm a Software Engineer and Cybersecurity enthusiast, currently completing a degree in Computer Science. I'm based in Brazil and specialize in Full-stack Development and Application Security.

Timeline

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Years of experience

Completed Projects

Technical Skills

Client Satisfaction

About Me

My name is Gabriel Arruda (aka arrudagba), I’m 21 years old, based in Rio de Janeiro, Brazil. I have 2+ years of experience as a Full‑stack Developer, UI/UX Designer and Pentester.

I’m currently pursuing a degree in Computer Science in PUC-Rio and focus on building secure, well‑structured applications that balance performance, usability, and security.

My main stack includes React, Next.js, Express, and backend tools like Actix and FastAPI. I also have hands‑on experience in cybersecurity and Red Team operations.

I work at the intersection of software engineering and security — from designing interfaces and APIs to hardening systems, reviewing code, and exploring vulnerabilities — always aiming for practical, reliable solutions rather than overengineered ones.

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My Timeline

Sep 2025 - Present
Vizo.dev
Junior Full-stack Developer
- Developed
Nov 2023 - Present
Freelance Path
Freelance Software Developer
CASCO Website

Skill Overview

Technologies, tools, and foundations I work with on a daily basis

Frontend

Building responsive and dynamic user interfaces.

HTML5CSS3JavaScriptTypeScriptReact.jsVue.jsNext.jsAngularTailwind CSSFramer Motion

Backend

Creating robust APIs and server-side applications.

Node.jsExpress.jsJWTZodBunActix WebGraphQLREST APIs

Database

Managing and designing efficient data storage solutions.

MongoDBMySQLPostgreSQLFirebaseHasuraRedis

DevOps

Deployment, CI/CD, and server management.

GitGitHubVercelPostmanDockerKubernetesAWSAzureGoogle Cloud

Tools

Design, coding, and productivity tools.

FigmaVS CodeNPMESLintPrettier

Programming Languages

Core programming languages used for systems, backend, and frontend development.

RustPythonJavaScriptTypeScriptC

Skill Level Charts

Technical & Dev Skills

Human & Creative Skills

Selected Projects

Here's a curated selection showcasing my expertise and the achieved results

ConvertKiller - File Conversion & Compression Tool

Next.jsTypeScriptTailwindWASMRust

Private, open-source file converter running entirely in the browser via WebAssembly

GitHub Live Demo

Portfolio

Next.jsTypeScriptTailwind

My personal portfolio website showcasing my projects, skills, and experience as a Full-stack Developer and UI/UX Designer

GitHub

CASCO's Website

Next.jsTypeScriptTailwind

Official website for CASCO, the university's first cybersecurity club, featuring event information, resources, and community engagement

Live Demo

URL Shortener - Scalable Link Management Service

Next.jsJavaScriptTailwindActixWebPostgreSQL

URL Shortener is a scalable and efficient link-shortening service built with Rust (Actix Web) for the backend, Next.js for the frontend, and Supabase (PostgreSQL) as the database

GitHub Live Demo

FAQS

Have Questions?

I specialize in full-stack development with React, Next.js, and TypeScript on the frontend, and Node.js with Express or Rust with Actix Web on the backend. I also work extensively with PostgreSQL, Docker, and cloud platforms like AWS and Vercel. My focus is building secure, scalable applications with clean architecture.

Security is at the core of everything I build. With experience in pentesting and Red Team operations, I apply defensive programming practices, implement proper authentication/authorization, validate inputs rigorously, and design systems that are resilient against common vulnerabilities. I believe in security by design, not as an afterthought.

I have 2+ years of experience designing user interfaces with a focus on usability and accessibility. I use tools like Figma for prototyping and design systems, and I implement responsive, modern interfaces using Tailwind CSS and Framer Motion. I believe good design is invisible—it just works.

Yes! I'm open to collaborating on full-stack projects, security audits, or open-source initiatives. Whether it's building a new product from scratch, hardening existing systems, or contributing to meaningful FOSS projects, I'm always interested in working on challenging problems with passionate people.