Full Stack iOS Engineer - c3 - Fluent English required

About c3

c3 is building the spatial intelligence data layer for the global rental market. We are preparing for a commercial pilot in the UK and US.

The role

You will be one of the first engineering hire into the product team, reporting to our existing backend consultant and working directly with the founder. Your immediate focus is preparing the App Clip and user-facing dashboard for pilot deployment - refining the frontend to the specific workflow needs of each pilot client, then running a tight feedback loop with those clients to improve the scan experience and fix issues in real time.

Longer term, you will own the data collection user experience end-to-end, building the scan pipeline into a dataset that is clean, structured, and ready for the ML/CV engineer who joins in the next phase.

What you will do

• Refine and harden the existing iOS App Clip (SLAM/LiDAR pipeline, point cloud capture, GLB output) for deployment
• Work directly with pilot users
• Run a structured feedback loop: capture issues, prioritise fixes, deploy rapidly
• Ensure scan outputs are consistent, complete, and correctly structured for downstream ML use
• Build the labelling and QA tooling the ML/CV engineer will need to begin training the comparison model

• Maintain and improve the agent dashboard as pilot requirements evolve

   

What we are looking for

• Strong iOS development (Swift, SwiftUI) with production App Clip or App experience
• Hands-on experience with ARKit
• SLAM/LiDAR frameworks - you have shipped something that uses the iPhone's spatial sensing hardware
• Comfortable across the full stack - backend integrations, data pipelines, cloud infrastructure - not just the frontend
• Experience collecting and structuring data for ML pipelines is a strong advantage
• Able to work with ambiguity, move fast, and communicate clearly with non-technical clients
• Fluent English - you will be on calls with UK and US users and team regularly

• Based in Kyiv preferred; hybrid or remote considered for the right candidate

   

What we offer

• Direct collaboration with the founder and a small, focused team building something technically novel
• Competitive salary benchmarked to Kyiv senior engineer market rates
• The opportunity to own a product that is already built, already works, and is going into real commercial use immediately