Mobile Software Engineer (Kotlin Multiplatform)

About the role

Join Cauli, a fast‑growing climate‑tech startup, as the lead mobile engineer. You will own the migration of native iOS and Android applications into a unified Kotlin Multiplatform codebase while delivering new consumer‑ and client‑facing features.

Key responsibilities

• Develop and maintain mobile apps using Kotlin, including a point‑of‑sale client app and consumer tools.
• Architect and execute the transition to a single Kotlin Multiplatform codebase.
• Integrate lightweight web apps with Apple Wallet and Google Wallet for container tracking.
• Collaborate directly with the Head of Tech and contribute to backend services (PHP/Laravel) and occasional Python work on smart‑bin hardware.

Required profile

• 1–2 years of professional mobile engineering experience with production‑level Kotlin.
• Strong native Android development skills and a keen interest in Kotlin Multiplatform.
• Startup mindset: comfortable touching backend code and hardware integrations while maintaining clean, production‑quality code.

Required skills

• Kotlin
• Kotlin Multiplatform
• Android development
• iOS development
• PHP
• Laravel
• Python
• Linux
• Apple Wallet integration
• Google Wallet integration

What we offer

• High autonomy and ownership of a critical migration project.
• Opportunity to work with prestigious enterprise clients such as BT and NHS Barts Trust.
• Equity options as an early‑team member.
• Collaborative, founder‑led environment focused on solving an environmental crisis.