Hi there! My name is Juan Antonio Fonseca Mendez

I am freelance software and game developer, and overall tech enthusiast; My main interests right now are XR, game AI and serious games
Welcome to my portfolio page. Let's make something amazing together!

Projects

These are some projects I have worked on in my professional career, and a couple I made as a student. Sadly I am not at liberty to share all the projects I have participated in, but I believe these show the range of my skills, as well as their progression.

Freelance client work, confidential under NDA

Freelance Work

Various clients

2024 - Present

Since going freelance I have worked on an AI-driven wellness companion app and a VR first-aid training simulation for Meta Quest, among other projects. Client work means I can't share screenshots, but I can walk through the technical scope.

  • Unity
  • VR/AR
  • AI Integration
Arkero VR gameplay screenshot

Arkero VR

Interco LLC

2023

This is a VR game multiplayer FPS Arena game where you fulfill tasks together with your teammates using a bow as a weapon against the forces of evil

Platform: Meta Quest 2 and Steam VR (alpha phase)

  • Unity
  • Multiplayer
  • Meta Quest / SteamVR
Wonder! VR fitness app screenshot

Wonder!

Wonder XR

2022

Metaverse fitness app that uses mainly boxing movements. It was intended to be a platform for creators to market their own routines and metaverse spaces.

Platform: Meta Quest 2

  • Unity
  • VR
  • Meta Quest
Yeltic Learn app screenshot

Yeltic Learn

Yeltic Inc.

2021 - 2022

This is an educational mobile platform for hard and soft skills training in the workplace. It can be tailored to each company's needs.

Platform: iOS / Android

  • Unity
  • AR
  • Mobile
Traffic Jam Sim game screenshot

Traffic Jam Sim

Universiteit Utrecht

2018-2019

This was the final product of my Master's thesis. I used this minigame to conduct studies on the relation between competition, player engagement and learning.

Platform: Web

  • Unity
  • WebGL
  • Game AI
DeAR VR prototype screenshot

Prototype: DeAR

Hogeschool van de Kunst Utrecht (HKU)

2017

This is a project I did in collaboration with Game Art students as their tech consultant. The task was to create a prototype to help burn patients with their pain management

Platform: Oculus Rift CV1

  • Unity
  • VR
  • Oculus Rift

About

A few highlights, since bullet points can't fully capture a person — I also enjoy teaching and mentoring along the way.

Based in Frankfurt, Germany

Originally from Mexico City, now living in Germany with full residency and work permits. Native Spanish speaker, C2 English, and currently working towards German B1.

M.Sc. in Game and Media Technology, B.Eng. in Computer Engineering

Master's from Universiteit Utrecht (NL); Bachelor's from Universidad Nacional Autonoma de Mexico, focused on graphics and intelligent systems.

6+ years building interactive applications, mainly in Unity/C#

Focused on VR/AR (Hololens 2, Meta Quest 2, Oculus Rift) and multiplayer/networking with Photon, alongside game AI, localization and mobile features. Also comfortable in Unreal Engine, C++ and Python.

My biggest interest: AI applied to games

I've integrated the ChatGPT API, Niantic's Lightship AR framework, and Microsoft Cognitive Services into past projects, and want my career to keep heading toward this intersection.

2nd place, Best Use of ShapesXR — XR Creator Con Hackathon (2024)

Built the Unity implementation of an AI-driven AR plant care app with an international team in a single hackathon. More on that project.

Get in touch

If you want to collaborate or have any inquiries about the information presented here, don't hesitate to reach out via email or any of my socials.