Antonio Espinosa
> Rendering Engineer & Ph.D. Researcher_
Graphics Engineer specialized in low-level APIs (DirectX 12, Vulkan) and real-time rendering architecture. Proven track record of shipping AAA titles and developing high-performance solutions for both production and academic research. Particularly drawn to roles involving custom engine architecture, GPU optimization, and the implementation of state-of-the-art rendering techniques.
Experience
Rendering Engineer
Grip Studios, Remote
- Primary engineer responsible for implementing the DirectX 12 graphics backend from scratch for the Xbox Series X|S versions of Mafia: Definitive Edition and Mafia III, seamlessly integrating it into the engine's existing RHI.
- Modernized the legacy RHI architecture to support modern graphics API paradigms, designing and implementing a custom resource state tracker and frame synchronization mechanisms.
- Assisted the AGC counterpart implementation for PlayStation 5, adapting backend modules to ensure parity and consistent performance across current-gen consoles.
- Optimized CPU and GPU performance by profiling workloads, eliminating legacy renderer bottlenecks, and refining core algorithmic logic.
Graphics Engineer
Seabery Soluciones S.L, Madrid (Hybrid)
- Achieved a 200% rendering performance increase by resolving wait-idle pipeline bottlenecks and implementing a custom Vulkan resource state tracker for automatic barrier generation, following an extensive profiling audit.
- Architected a new GPU scene management system to efficiently translate high-level assets into optimized GPU resources, synchronizing acceleration structure creation and maximizing operation batching.
Research Fellow
MSLab - Rey Juan Carlos University, Madrid (On-site)
- Engineered an extensible Vulkan renderer for a European R&D project on ML-driven avatar visualization, specifically designed for real-time human hair and skin shading.
- Designed a light-weight API closely mapped to the RHI to enable rapid prototyping of rendering techniques without high-level framework bloat.
- Delivered lectures to Master's students in advanced 3D mathematics and rendering techniques using Vulkan API.
Graphics Engineer Intern
SEDDI / Desilico, Madrid (Hybrid)
- Implemented a real-time WebGL fur rendering and combing system within the proprietary Three.js-based engine (Author) by researching and adapting academic papers on hair illumination algorithms.
Selected Works
Axion Engine
High-performance, graphics-API-agnostic render engine (C++, Slang, Vulkan, DirectX 12) built to scale from experimental rendering research to fully featured real-time applications. Features a RenderGraph with automatic barrier insertion and transient resource management, and a GPU-driven pipeline using mesh shaders, indirect drawing, compute-based culling and pure bindless architecture powered by a hot-reloaded Slang shader system. Includes Nanite-inspired geometry rendering built on meshlets and a Visibility Buffer.
View Source :: GitHub →
Cloth Behaviour Simulation
Physically based simulation modeling complex fabric interactions using Compute Shaders.
View Source :: GitHub →
Vulkan Custom Renderer
Comprehensive 3D rendering library (C++, Vulkan, GLSL) acting as an accessible wrapper for verbose Vulkan API components. Features forward and deferred pipelines built from scratch, Global Illumination using Voxel Cone Tracing, Diffuse and Specular IBL, Physically Based Bloom (CoD), raytraced shadows/AO and SSR.
⭐ Valued by the community with 40+ stars on GitHub
View Source :: GitHub →
OpenGL Renderer
Real-time graphics pipeline implementation showcasing fundamental computer graphics algorithms.
View Source :: GitHub →
WebGL Real-Time Fur
Browser-based real-time fur rendering and combing system using WebGL and custom shader programming, developed during an internship at SEDDI by adapting academic papers on hair illumination algorithms.
View Source :: GitHub →
Gears Of Hell
Game development project featuring custom graphics integration and internal tooling.
View Source :: GitHub →Education
PhD Candidate in Computer Graphics
Rey Juan Carlos University, Madrid
- Researching and developing inverse rendering pipelines to extract complex hair material parameters from both synthetic (Mitsuba Renderer) and real-world photographic datasets.
- Tackling global illumination inversion challenges to infer hair physical material parameters, serving as priors for a potential ML-driven hair neural material.
- Engineered a volumetric hair GI pipeline based on Cem Yuksel's dual scattering approximation, implementing raymarching techniques to accurately simulate complex light transport through the hair volume.
Master's Degree in Computer Graphics
Rey Juan Carlos University, Madrid | First in Class (9.2/10 GPA)
Degree in Videogame Development
Rey Juan Carlos University, Madrid
Skills
Programming Languages
Advanced FamiliarAPIs
Advanced FamiliarEngines & Tools
Advanced FamiliarTechniques
Advanced FamiliarLanguages
3D Art
Kabuto
Beyond rendering, 3D art is a personal hobby. This samurai kabuto helmet is my own work.
View Portfolio :: ArtStation →