Mobile/Web Developer - AI Spatial Products - Sizeless team
Remote
Full Time
Sizeless
Mid Level
We at Holycode are currently looking for a passionate and experienced Mobile / Web Developer to join sizeless, a YC S23-backed startup building the data layer of the built world.
About the company
Sizeless turns smartphone videos into high-accuracy digital twins of buildings and infrastructure — no special hardware needed. Their 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.They are a small, high-energy, YC-backed team delivering outsized impact. You will work directly with their 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.
You’ll Work On
They are looking for a Mobile / Web Developer to help build and scale their mobile capture experience and 3D visualization stack. You will work on production systems that turn real-world environments into usable digital building data. This role sits at the intersection of mobile development, web front-end, and 3D visualization. While you will interface with computer vision and spatial data, the focus is on product, UX, and reliable delivery.
Your Profile
About the company
Sizeless turns smartphone videos into high-accuracy digital twins of buildings and infrastructure — no special hardware needed. Their 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.They are a small, high-energy, YC-backed team delivering outsized impact. You will work directly with their 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.
You’ll Work On
They are looking for a Mobile / Web Developer to help build and scale their mobile capture experience and 3D visualization stack. You will work on production systems that turn real-world environments into usable digital building data. This role sits at the intersection of mobile development, web front-end, and 3D visualization. While you will interface with computer vision and spatial data, the focus is on product, UX, and reliable delivery.
Your Profile
- Strong experience in mobile or web development (iOS / Swift and/or modern web frontend)
- Solid frontend fundamentals and product-oriented thinking
- Experience with or strong interest in 3D visualization (e.g. Three.js, WebGL, interactive 3D UIs)
- Comfortable working with complex datasets and performance-sensitive applications
- You enjoy ownership, fast iteration, and working in small, high-impact teams
- Experience with spatial applications, AR, or 3D viewers
- Exposure to geometry, mapping, or visualization-heavy products
- Build and improve the mobile capture experience (iOS), including: reliable video acquisition, smooth scanning flows, error handling and real-time user feedback
- Contribute to processing and visualization pipelines, integrating reconstructed geometry and large spatial datasets
- Develop and extend the web-based 3D Viewer using Three.js / WebGL
- Implement interactive tools such as camera controls, measurements, and UX improvements
- Collaborate closely with backend and algorithm teams to integrate new features into production
- Ensure performance, usability, and reliability across devices
- Take ownership of features through implementation, deployment, and iteration
- (Optional) Collaborate with the AI / algorithm team to integrate new spatial or geometry-related capabilities into the product
- Tackle unique technical challenges in computer vision, 3D reconstruction, and spatial intelligence
- Be part of a small, high-impact team backed by Y Combinator and world-leading investors
- Shape the future of digital twins and spatial data for buildings
- Familial working atmosphere in an open-minded multinational team
- Working remotely (from Romania)
- All necessary equipment – up to you to decide what you prefer
- A budget for professional improvement (courses, conferences, books)
- A budget for multi-benefits platform (meal tickets, private pension, etc.)
- Premium private medical subscription with nationwide coverage
- Budget for mastering English and German
- Skilled and senior co-workers
- Opportunities to build products that really make a difference
- Opportunities to learn and grow with us
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