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Luiz Junior
Executive XR Engineer specializing in Unity-based VR/AR/MR platforms
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About
Unity/C# VR engineer specializing in medical simulation: built a VR surgical trainer with real dual robotic-arm hardware integration and a full surgical workflow UI used to retrain doctors (with published results). In 2024, re-architected multiplayer for a Becton Dickinson medical VR product by creating a FishNet layer that emulated Photon PUN using Roslyn + IL-level codegen to avoid large-scale rewrites, and ships cross-platform VR (Quest) + mobile experiences.
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Key Strengths
- Owned end-to-end VR surgical simulation with real robotic arm integration (driver + VR interactions + workflow UI)
- Designed extensible interaction architecture supporting bimanual robot-arm interactions and precise object attach/detach
- Strong focus on realism/feel for clinician users; iterated based on doctor training use cases and feedback
- Migrated large production VR app away from Photon by building a FishNet compatibility layer to minimize regressions
- Advanced networking tooling: RPC/syncvar codegen via Roslyn plus IL-level reference rewriting
- Pragmatic multiplayer debugging workflow using multi-editor instances and coordinated VR playtesting
- Cross-platform architecture for shared VR + mobile experiences (VRPlayer vs TouchPlayer) with unified interaction abstractions
- Performance optimization for Quest/mobile: pooling, minimizing GC, lightmapping/static lighting, 3D asset optimization
- Effective use of LLM tools to accelerate prototyping/algorithm exploration while maintaining manual architectural oversight
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