Full Stack Developer & Game Developer

I design and build modern web, mobile applications, focused on performance, scalability, and user experience. From full-stack platforms and collaborative systems to mobile applications, multiplayer experiences, and developer tools.

I started programming about 3 years ago with Java while studying a Multi-Platform Application Development degree. Since then I have kept learning on my own and today I focus on scalable web platforms, multiplayer systems and developer tools.

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Jonathan Dorado

Projects.

A collection of real-world applications built with different technologies, focused on learning, scalability and user experience.

spinly-psi.vercel.app
Spinly screenshot
01 / 04 Completed

Spinly

A prize wheel for giveaways, raffles and everyday decisions: custom themes and presets, your own music, knockout tournaments and accounts that sync across devices.

Role: Designed and built the whole app: a pure-CSS wheel, Web Audio sound effects, beat-synced lights and a Supabase backend with anonymous accounts and Row Level Security.

Learned: Audio synthesis and analysis in the browser, Web Workers, and syncing local-first data with Supabase.

GitHub Visit site
quiz-mania-blond.vercel.app
QuizMania screenshot
02 / 04 Completed

QuizMania

A trivia game played on a slot machine: spin for a topic, pick one of five modes, challenge friends in Versus duels and climb the leagues and rankings.

Role: Built the game in TypeScript with a custom build script, synthesized sounds, 30 topics and a Supabase backend: accounts, friends, rankings and server-side score validation.

Learned: PostgreSQL functions and Row Level Security, designing a fair scoring system and shipping a typed codebase without a framework.

GitHub Visit site
myconversor.duckdns.org
MyConversor screenshot
03 / 04 Completed

MyConversor

A single-page tool to download, trim and convert video and audio from YouTube, TikTok, Twitch and more, with a library, accounts and a built-in music player.

Role: Built the Angular front end with Tailwind and a Node.js + Express server that drives yt-dlp and FFmpeg, then deployed it with Docker on Oracle Cloud.

Learned: Server-side rendering with Angular, running and streaming child processes safely, Docker deployments and scoring 100 on Lighthouse.

GitHub Visit site
github.com/Jondals/Chatterly
Chatterly screenshot
04 / 04 Completed

Chatterly

A web social platform inspired by Discord: add friends, customize your profile and talk through real-time chat and voice calls, sharing files and GIFs right in the conversation.

Role: Developed the real-time messaging, the authentication flow and the voice calls on WebRTC, with a PHP and MySQL backend.

Learned: How WebRTC connections are negotiated, relational database design and how a back end and a front end talk to each other.

GitHub
Kairos screenshot
In development

Kairos

A personal operating system in one local-first app: tasks, finances, training, calendar and notes, with end-to-end encryption and optional bank and calendar sync.

Learned: Local-first architecture with IndexedDB, browser cryptography and testing complex parsers.

GitHub
DevStarter screenshot
In development

DevStarter

A VS Code extension that sets up popular frameworks and project templates in a few clicks.

Learned: The VS Code extension API and building command-line style interactive flows.

GitHub
MyMusic screenshot
In development

MyMusic

A cross-platform Flutter app that migrates Spotify playlists and lets you manage your own music collections.

Learned: Cross-platform development with Flutter and working with third-party music APIs.

GitHub
Damas Donde Sea screenshot
Completed

Damas Donde Sea

A classic checkers game in Java with a JavaFX interface, turn system and full board interaction.

Learned: Object-oriented design and building desktop interfaces with JavaFX.

GitHub
FlavorBalance screenshot
Completed

FlavorBalance

An Android app to manage recipes, with full create, edit and delete and a local database.

Learned: Android app architecture and local persistence with Room.

GitHub

Game Development.

Game prototypes focused on gameplay programming, multiplayer systems, and interactive mechanics built with Unity.

Parkour Beans screenshot
Prototype

Parkour Beans

A first-person parkour prototype focused on fast movement and fluid traversal across platforming levels.

Focus: Designed a modular player controller with wall-running, sliding, jumping, air control, a grappling hook and moving or bouncing platforms.

Learned: Game feel, physics-based character movement and structuring gameplay code into small reusable components.

GitHub
NextbotScape Beans screenshot
Prototype

NextbotScape Beans

A Backrooms-style multiplayer horror game built around cooperative exploration and real-time interaction.

Focus: Built the multiplayer architecture with Netcode for GameObjects: lobbies with join codes, player and animation sync, flashlights and interactive doors, plus basic AI with pathfinding.

Learned: Client-server synchronization, authority and latency in multiplayer games, and navigation meshes for AI.

GitHub

Experience.

  1. Now

    Freelance · Currently

    Freelance Full Stack Developer

    I currently work as a freelance developer building web applications, improving backend systems and developing complete digital products. I also build personal projects to explore new ideas and technologies. I am open to collaborating on new projects and opportunities, focusing on clean architecture, performance and user-focused software.

  2. 2025

    Internship · 3 months

    Full Stack Developer Intern

    SoportTec

    Built a dynamic invoice template editor that allowed users to define templates using JSON or Python, render them in real time, visually edit the output and export results to PDF, JSON or Python code. This project provided hands-on experience with Django, Python backend systems and document rendering architectures.

  3. 2022

    Internship · 4 months

    IT Support & Systems Intern

    Ayuntamiento de Huelva

    During my internship at the Huelva City Council, I was responsible for supporting the installation, configuration, and maintenance of Linux servers, assisting in the monitoring and management of network infrastructure to ensure system stability and performance, and collaborating on internal administrative tasks, including data management and reporting using Microsoft Excel.

Skills.

Frontend & Mobile

Backend

Databases

DevOps & Tools

Game Development

Soft skills

  • Teamwork
  • Communication
  • Problem solving
  • Self-learning
  • Adaptability
  • Time management
  • Critical thinking
  • Attention to detail

Languages

  • Spanish · Native
  • English · A2