Mobile / Web Developer Intern for AI Spatial Products

Join sizeless (YC S23) — Building the Data Layer of the Built World

At sizeless, we turn smartphone videos into high-accuracy digital twins of buildings and infrastructure — no special hardware needed. Our mission : digitize the built world and provide a unified data layer that empowers architects, engineers, and energy consultants to make smarter, faster decisions — unlocking new insights and AI-driven applications.

We’re a small, high-energy, YC-backed team delivering outsized impact. Work directly with our founder & CTO, push the boundaries of computer vision and 3D reconstruction, and spatial intelligence .

All roles tackle the same core challenge : turning smartphone video into reliable, structured spatial data .

Tasks

You’ll Work On

You’ll work directly with our CTO on the mobile capture and 3D visualization pipeline : turning smartphone video into reliable, structured spatial data that architects, engineers, and energy consultants can actually use. This is applied computer vision and 3D reconstruction with immediate real-world impact .

What you’ll do :

• Build and improve the mobile capture experience : reliable video acquisition, smooth scanning, error handling, and real-time feedback.
• Optimize processing pipelines : reconstruction, feature tracking, and 3D model generation.
• Work with CV & 3D geometry : tracking, depth estimation, and analytics.
• Contribute to the web-based 3D Viewer : Three.js / WebGL implementation, interactive tools, and UX improvements.
• (Optional / bonus) Collaborate with the AI / algorithm team to integrate new features or enhancements from the research side.

Requirements

Who You Are

Benefits

What We Offer

If AI, 3D tech, and real-world problem solving excite you, come build the data layer of the built world with us .