Joe Fioti
Co-Founder, CEO at Luminal (YC S25)
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJoe Fioti is a seasoned software engineer and founder with 10 years of experience, currently co-founder and CEO of Luminal (YC S25) in San Francisco. He has led multiple startups including Sidekick AI and General Cognition while shipping production software at Intel and Lockheed Martin, blending product leadership with systems and ML engineering. An adjunct lecturer at Penn State, he pairs teaching and research-minded rigor with hands-on development. As an open-source contributor he implemented core tensor and matrix operations for the dfdx Rust deep-learning library, showing uncommon low-level numerical and performance expertise for a startup CEO. Comfortable moving between strategy, code, and architecture, he builds teams and tooling that take ML prototypes into production.
10 years of coding experience
5 years of employment as a software developer
S25, S25 at Y CombinatorComputer Science, Machine Learning, Computer Science, Machine Learning at Penn State UniversityDallas Senior High School
Stackoverflow
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Github Skills (10)
matrix-multiplication10
autodiff10
machine-learning10
rust10
tensor10
deep-learning10
deep-learning-ai10
autograd10
neural-network9
gpu8
Programming languages (10)
Github contributions (5)
coreylowman/dfdx
Jul 2022 - Jul 2022
Deep learning in Rust, with shape checked tensors and neural networks
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 reviews, 16 commits, 7 PRs in 9 days
Contributions summary:Joe primarily contributed to the core functionality of the `dfdx` repository, focusing on implementing mathematical operations and features relevant to deep learning in Rust. Their work included adding functions for matrix multiplication and broadcast operations, along with creating and integrating tests. These additions enhance the library's capabilities for tensor operations, which is essential for building neural networks and supporting deep learning applications.
ndarraybackpropagationdeep-learningrustneural-networks
jafioti/luminal
Jul 2023 - Mar 2025
Deep learning at the speed of light.
Contributions:2 releases, 24 PRs, 715 pushes in 1 year 8 months
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