Mobile iOS Developer - AI Spatial Products - Sizeless team
Remote
Full Time
Sizeless
Mid Level
We at Holycode are currently looking for a passionate and experienced Mobile iOS 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 iOS Developer to help build and scale their mobile capture experience. You will work on production systems that turn real-world environments into usable digital building data, with a strong focus on iOS, product quality, UX, and reliable delivery.
While your core responsibility will be iOS development, this is a startup environment: you’ll collaborate closely across disciplines and may occasionally contribute to adjacent areas (product, web dev, tooling, debugging pipelines) as needed to ship great software.
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 iOS Developer to help build and scale their mobile capture experience. You will work on production systems that turn real-world environments into usable digital building data, with a strong focus on iOS, product quality, UX, and reliable delivery.
While your core responsibility will be iOS development, this is a startup environment: you’ll collaborate closely across disciplines and may occasionally contribute to adjacent areas (product, web dev, tooling, debugging pipelines) as needed to ship great software.
Your Profile
- Strong experience in mobile iOS development (Swift)
- Solid mobile engineering fundamentals and product-oriented thinking
- Experience building reliable, performance-sensitive mobile applications
- Comfortable working with complex datasets and performance-sensitive applications
- You enjoy ownership, fast iteration, and working in small, high-impact teams
- You’re pragmatic and adaptable, and comfortable wearing multiple hats when needed
- Experience with spatial applications, AR, or 3D related products (Three.js / WebGL, etc.)
- Exposure to geometry, mapping, or visualization-heavy products
- Experience with web development (React/Next.js or any other modern web frontend frameworks)
- 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
- 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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