Technical leader
I lead engineering teams and own architecture end to end, from ML pipelines to cloud infrastructure.
Personal Site
Daniel Sisson
Co-Founder & CTO at Phyll AI, building the real-time intelligence layer for the built environment with computer vision, GIS, and Gaussian splats.
I’m an engineer, founder, and sci-fi writer who took the long road to tech, from marketing to product to code. These days I lead Phyll’s technical team and build alongside AI agents every day.
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What I Do
Builder
I work across computer vision, 3D and Gaussian splats, GIS, XR, and the web, and I still write code every day.
Founder
Three companies in, I’ve worn every hat along the way: product, marketing, business development, and engineering.
Writer
I write about technology, where things are headed, and the occasional piece of short science fiction.
Selected Work
Phyll AI
Turns everyday footage from dashcams, phones, drones, and CCTV into a continuously updating map of physical infrastructure. I lead the technical team and own the platform end to end: detection, geo-anchoring, 3D reconstruction, and AWS architecture.
Foundry
A Unity SDK for multiplayer VR, with runtime networking, a database layer, and APIs, built at CyberHub for clients including Dell, EE, Credit Agricole, and the Museum of Science Fiction.
Location-Based XR
Immersive experiences designed for physical spaces, including ongoing VR work in healthcare in Spain.
AI TLDR
A lightweight tool that summarizes long articles into concise insights using local LLMs.
Writing
Notes on technology, sci-fi, and where things are headed.
I publish essays and short pieces on AI, emerging technology, trends, and the broader systems shaping the future.
Topics I keep returning to
- Artificial intelligence and emerging technologies
- Building prototypes and early-stage products
- Societal trends
- Space exploration
- Sustainable technology
- Science fiction
Current Focus
Right now I’m focused on building and exploring:
- Computer vision and ML pipelines for the built world
- Gaussian splats and 3D reconstruction for GIS
- AI-native engineering, building alongside agents
- VR for healthcare
Contact
Always happy to talk about spatial AI, GIS, XR, or what’s next, and open to the occasional advisory or fractional role. Based in Barcelona, often in California and Miami.