Holycode™
Mobile/Web Developer - AI Spatial Products - Sizeless team
Holycode™Romania1 day ago
Full-timeRemote FriendlySales, General Business +1
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
  • 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
Bonus:
  • Experience with spatial applications, AR, or 3D viewers
  • Exposure to geometry, mapping, or visualization-heavy products
     
Key Responsibilities
  • 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
     
Why you will love working here
  • 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
     
If you are looking for an environment where you can grow professionally, work on technically challenging problems, and build real-world AI products with impact, please submit your CV in English.

Key Skills

Ranked by relevance
Apply