John Mullan
Member Of Technical Staff at xAI
Menlo Park, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Mullan is a software engineer and founder with six years of professional experience building machine learning, 3D graphics, and systems software across startups and consulting. He co-founded Hotshot as CTO and ran Commander Prompt consulting on computer vision and graphics, demonstrating a blend of product leadership and hands-on engineering. Proficient in Java, C/C++, C#, Objective-C, Swift, Python, OpenGL and Metal, he moves between low-level performance work and ML model development—now contributing to xAI from Menlo Park. His applied mathematics background from the University of Edinburgh underpins a pragmatic approach to algorithm design and optimization. Notably, his GitHub bio highlights active ML work at Hotshot, reflecting continued engineering ownership even while leading teams.
6 years of coding experience
13 years of employment as a software developer
Bachelor of Applied Science (B.A.Sc.) Mathematics, Bachelor of Applied Science (B.A.Sc.) Mathematics at The University of EdinburghMathematics, Mathematics at Coleraine Academical Institution
English
Github Skills (26)
python8
deep-learning8
ai8
gpu8
machine-learning8
neural-network6
tensorflow6
chatbot5
numpy5
multimodal5
rendering5
chatgpt4
foundation-models4
computer-vision3
unity3d3
Programming languages (2)
Github contributions (5)
hotshotco/Hotshot-XL
Oct 2023 - Jan 2025
✨ Hotshot-XL: State-of-the-art AI text-to-GIF model trained to work alongside Stable Diffusion XL
Contributions:1 review, 17 PRs, 14 pushes in 1 year 3 months
aihotshothotshot-xlsdxltext-to-gif
naturalsynthetics/ColorSlider
Jul 2020 - May 2021
🎨 Snapchat-style color picker in Swift
Contributions:1 release, 4 pushes, 1 tag in 10 months
snapchatswiftioscolor-pickerpicker
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