Sebastian
Computer Scientist
Oregon, United States
Summary
🤩
RockstarSebastian Barrios is a technology executive and founder with a 7-year formal engineering career who now leads large global teams as SVP of Engineering at Roblox after scaling Mercado Libre’s 18K+ developer organization. He blends hands-on systems and rendering expertise—contributing to notable open-source projects like Servo/Pathfinder with WebGL backends and SIMD optimizations—with strategic leadership that drove Cabify from startup to a profitable, billion-dollar platform. A physicist-turned-self-taught computer scientist and permaculture enthusiast based in Oregon, he applies scientific rigor and long-term systems thinking to product, platform and developer-platform engineering. Sebastian has a track record of turning monoliths into microservices, cutting compute costs dramatically, and enabling massive multi-cloud automated deployments. He is comfortable alternating between low-level performance work (graphics, PDF rendering) and high-level org design, mentoring, and M&A technical integration.
7 years of coding experience
Github Skills (14)
rendering10
webgl10
pdf-processing10
rust10
render10
graphic10
text-rendering10
binary-search9
error-handling9
simd9
data-structures8
image-processing8
data-structure8
algorithms7
Programming languages (2)
Github contributions (5)
pdf-rs/pdf
Sep 2019 - Jan 2023
Rust library to read, manipulate and write PDF files.
Role in this project:
Backend Developer
Backend DeveloperContributions:31 reviews, 248 commits, 88 PRs in 3 years 5 months
Contributions summary:Sebastian focused on improving the core functionality of the PDF library. The commits detail refactoring primitive dereferencing, enhancing the text rendering, and modifying color space handling. They also added and improved various operators and implemented functionalities to manage patterns and inline images.
rust-librarypdfrustpopplerpdf-files
servo/pathfinder
Dec 2019 - Dec 2022
A fast, practical GPU rasterizer for fonts and vector graphics
Role in this project:Software Engineer (Graphics & Rendering)
Software Engineer (Graphics & Rendering)Contributions:14 reviews, 40 commits, 37 PRs in 2 years 11 months
Contributions summary:Sebastian contributed significantly to the `pathfinder` project, focusing on optimization and feature additions related to the rendering pipeline. They implemented a WebGL backend, enabling web-based rendering capabilities. Furthermore, the user refactored and optimized existing code, including the `SortedVector` and SIMD implementations, improving performance. Their work extended to adding features, such as color matrix filter, and refactoring to incorporate render transforms within the rendering engine.
gpuvector-graphicsfontspracticalvector
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