A polished e-commerce concept built to showcase construction-block products with a clear shopping flow, product cards, and a strong brand identity.
- HTML
- CSS
- JavaScript
- E-commerce
About
About
I'm Sergio Garcia Cristobal, and I am currently pursuing a Computer Engineering degree at UC3M. I am especially interested in the area of cybersecurity, AI and quantum computing.
Over the last few years I have taught myself HTML, CSS, JavaScript, React, React Native, SQL, and the basics of Arduino and cybersecurity through hands-on projects, HackTheBox, and TryHackMe. I like learning by building, refining, and shipping work that feels practical and well finished.
Experience
Experience
2022 - Present
Self-taught Developer · Independent
I have spent the last few years learning by building small web experiences, mobile apps, and technical experiments. My focus has been on React, JavaScript, and turning ideas into clean, functional products.
- HTML
- CSS
- JavaScript
- React
2023 - 2025
Cybersecurity Practice · Hack The Box & TryHackMe
I have been exploring the basics of cybersecurity through guided labs and challenge platforms, building a practical understanding of networking, web security, Linux, and problem-solving under pressure.
- Cybersecurity
- Linux
- Networking
- Pentesting
Projects
Projects
An algorithm-driven planner that organizes study sessions across the week based on the number of hours you want to commit.
- JavaScript
- Productivity
- Planning
- Automation
A mobile to-do app with async storage, custom priorities, reminders, and push notifications, designed with a minimal modern interface.
- React Native
- TypeScript
- Async Storage
- Notifications
A personal exploration wiki for tracking planets discovered in No Man's Sky, with tag-based search, map views, and an organized way to revisit discoveries.
- Next.js
- React
- Search
- Maps
An AI-assisted tool designed to help Dungeon Masters understand and present encounter rolls with a more useful, game-ready output.
- AI
- JavaScript
- RPG Tools
- UX
A simple command-line interface for managing passwords with encryption using Python.
- Cryptography
- Python
- CLI
- Security
A simple command-line interface for scanning open ports on a network using Python.
- Networking
- Python
- CLI
- Security
A real-time SSH honeypot that captures credentials and commands from real attackers, geolocates each IP, and streams live events to a React dashboard with a world map and charts.
- Python
- Cybersecurity
- React
- WebSockets
- Networking
A modular offensive-security CLI and web dashboard that discovers devices via ARP, scans ports with Nmap, checks CVEs against the NVD API, and detects traffic anomalies such as ARP spoofing and port scans.
- Python
- Cybersecurity
- Networking
- CLI
- CVE
A personal finance dashboard that reads transactions from Notion, validates them with Zod, and shows budgets, six-month trends, and advice on a local web dashboard backed by a REST API and SQLite.
- TypeScript
- Express
- Notion API
- SQLite
- Dashboard
An accessibility-first React Native app that sends seniors a daily cognitive challenge - memory, math, logic, and motion games - with large touch targets, high contrast, and daily push notifications.
- React Native
- Expo
- TypeScript
- Accessibility
Skills
Skills
Frontend
- HTML
- CSS
- JavaScript
- React
- TypeScript
Mobile
- React Native
Hardware & Data
- Arduino
- SQL
Security
- Hack The Box
- TryHackMe
- Linux
- OWASP Top 10
Tools & Platforms
- Git
- GitHub
- VS Code
Soft Skills
- Self-learning
- Problem Solving
- Adaptability
- Teamwork
Education
Education
2026 — 2030 (expected)
B.Sc. in Computer Engineering
Universidad Carlos III de Madrid (UC3M)
Starting in September 2026 after years of self-directed learning in programming, systems, and hardware.
- Computer Engineering
- UC3M
- Cybersecurity
2024 - 2026
High School Diploma
Mirasur School
Completed both years with a combined average of 9.53 out of 10 and earned an honors distinction in technical drawing.
- High School
- Academic Excellence
- Mirasur School
Contact
Contact
Let's build something together
I'm open to internships, collaborations, and projects where I can keep learning and contribute from day one. If you think I'd be a fit, I'd love to talk.