Frenk Timmer

Software Engineer

I build immersive, interactive applications across multiple platforms.

About

I am a software engineer with over six years of experience in XR (VR, AR, and MR) development. I specialize in building immersive, interactive applications across multiple platforms using Unity, C#, and modern web technologies. I possess strong problem-solving skills and the ability to work collaboratively in a team environment.

I’ve developed both B2B and B2C applications, ranging from enterprise XR solutions to cross-platform VR and web experiences. Along the way, I’ve worked extensively on performance optimization, API development, and integrating AI systems such as GPT, text-to-speech, and speech-to-text to create more natural and engaging user interactions.

Beyond building features, I focus on improving how teams work. I’ve created internal tools, automated workflows, and contributed to CI/CD pipelines to streamline development and increase efficiency. I also enjoy mentoring others, sharing knowledge, and helping teams deliver high-quality, scalable products.

I’m driven by curiosity and a constant desire to learn—whether that’s experimenting with WebGPU, exploring new XR capabilities, or pushing the boundaries of what interactive experiences can be.

Outside of development, you’ll usually find me gaming, powerlifting, or tinkering with new tech.

Experience

  1. XR Engineer

    May 2023 — Dec 2025

    Cornerstone On Demand (formerly Talespin)

    Utrecht

    Contributed to a cross-platform B2C application using Unity and C#. Built features across both environments, integrated external plugins, and developed APIs for content and user management. Worked on WebGL lipsync, R&D projects with React Three Fiber/WebGPU, and AI integrations (GPT, TTS, STT). Focused on performance optimization, VR asset efficiency, and CI/CD pipelines (Jenkins), while creating Unity Editor tools to streamline workflows.

    • Unity3D
    • C#
    • VR/MR Development
    • API Development
    • JavaScript
    • WebGPU
    • React Three Fiber
    • AI Integrations
    • Performance Optimization
    • Shaders
    • CI/CD
  2. Unity Developer

    2019 — 2023

    Layers (formerly AR-Producties)

    Amsterdam

    Developed B2B XR applications for MR and VR platforms using Unity, handling both application logic and UI. Built interactive features, shaders, and internal tools, and created AR filters for Snapchat and Instagram. Focused on performance optimization, reusable Unity packages, and supported demos and mentoring.

    • Unity3D
    • C#
    • XR/MR Development
    • Shaders
    • AR Filters
    • Project Management
    • Performance Optimization
    • Mentoring
  3. Manager

    2016 — 2021

    Domino's

    Netherlands

    In my Manager role at Domino's, I trained and mentosky employees to maximize team performance. I managed complaints with calm, clear communication and collaborated with team members to achieve target results. My responsibilities included setting goals, delegating tasks, providing feedback, and addressing performance issues.

    • Team Management
    • Training & Mentoring
    • Communication
    • Leadership
  4. Database Manager

    2013 — 2015

    Sponsormail

    Netherlands

    Management of different database information. This includes making sure that the data is accurate, up-to-date, and organized in a way that allows for easy access and retrieval. I provided support to users who interact with the database.

    • Database Management
    • Data Organization
    • Technical Support

Projects

  1. TCG Binder

    TCG Binder

    A digital trading card binder application, built for organizing and showcasing Pokémon card collections through customizable binder pages.

    • React
    • TypeScript
    • React Router
    • Tailwind CSS
    • Vite
    • TCGDex API
    • Vercel
  2. Portfolio Website

    Portfolio Website

    Personal portfolio website, built with React and Tailwind, deployed on Vercel.

    • React
    • TypeScript
    • Tailwind CSS
    • React Router
    • Vercel
  3. MoreMissingPieces

    MoreMissingPieces

    A Valheim mod that expands the building system with additional craftable pieces. Created in Blender and integrated using Unity and BepInEx.

    10k+ downloads
    • C#
    • Unity
    • Blender
    • GIMP
    • BepInEx
    • Game Modding
  4. SilencePlease

    SilencePlease

    A Valheim mod that allows fine-grained control over in-game audio, enabling players to mute or adjust specific sounds such as creatures, environmental effects, and structures in real time.

    • C#
    • BepInEx
    • Unity
    • Game Modding

Skills

UnityExpert
C#Expert
XR / VR / MR DevelopmentExpert
Performance OptimizationExperienced
AI IntegrationsExperienced
API Development & IntegrationIntermediate
Unity Editor ToolingExperienced
JavaScript / TypeScriptIntermediate
ReactExperienced
WebGPU / WebXRIntermediate
Shader ProgrammingIntermediate
Unreal Engine 5Beginner
CI/CD & DevOpsExperienced
SparkAR / Lens StudioExperienced
Agile / ScrumExperienced