Lucas Gelfond
Software at A24
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolLucas Gelfond is a software engineer with 11 years of experience building product-focused systems across startups, research labs, and a creative studio environment at A24. He blends full-stack engineering with a research background in multiagent RL from Brown, where his work on language evolution was coauthored in CogSci and attracted mainstream attention. Lucas has shipped growth experiments and infrastructure—driving revenue at Substack and strengthening identity infra with Typescript and Rust at Footprint—while contributing to notable open-source projects like ffmpeg.wasm, improving browser testing and CORS integration. Equally comfortable prototyping interactive visuals (Three.js NYC planning viewer) and shipping production features (LaTeX editor work), he brings a pragmatic, multidisciplinary approach shaped by studies in ML, visual computing, and art & technology. Colleagues value him for pairing strong technical craft with an eye for product impact and unexpected cross-domain thinking.
11 years of coding experience
2 years of employment as a software developer
Bachelors degree Computer Science (ML/Visual Computing); Independent Concentration (Art and Technology), Bachelors degree Computer Science (ML/Visual Computing); Independent Concentration (Art and Technology) at Brown UniversityCross-Registration History of Industrial Design, Cross-Registration History of Industrial Design at Rhode Island School of DesignHigh School, High School at Harvard-Westlake School
English, Spanish
Stackoverflow
83reputation
2kreached
1answer
4questions
Github Skills (22)
webbrowser10
cross-domain10
cors10
javascript10
testing10
browser10
ffmpeg10
blazor-webassembly10
webassembly10
web-development10
cicd9
html9
nodejs8
react7
hash6
Programming languages (14)
Github contributions (5)
ffmpegwasm/ffmpeg.wasm
Dec 2024 - Jan 2025
FFmpeg for browser, powered by WebAssembly
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:1 release, 3 reviews, 13 PRs in 1 month
Contributions summary:Lucas primarily focused on enhancing the testing infrastructure and improving the build process for the FFmpeg.wasm project. Their work included debugging and adapting test environments, specifically targeting browser-based testing, and ensuring compatibility across different configurations. They also made updates to application configurations and server-side headers, demonstrating a focus on ensuring correct cross-origin resource sharing (CORS) and related browser features. Furthermore, they made improvements to the frontend integration of the project.
experimental-featuresbrowserwebassemblyvideoffmpeg
lucasgelfond/lucasgelfond.github.io
Feb 2016 - Apr 2022
Contributions:79 pushes, 1 branch in 6 years 3 months
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