Mobile Software Engineer – £40k–£45k + Equity

About the role

Join Cauli, the UK’s largest reusable packaging provider, as the lead mobile engineer. You will own the migration of native iOS and Android apps into a unified Kotlin Multiplatform codebase while delivering real‑world features for consumer and client‑facing applications.

Key responsibilities

• Develop and maintain mobile applications using Kotlin, including a point‑of‑sale client app and consumer‑facing tools.
• Architect and execute the migration to a unified Kotlin Multiplatform (KMP) codebase.
• Integrate lightweight web apps with Apple Wallet and Google Wallet for container tracking.
• Contribute to PHP/Laravel back‑end services and occasionally work with Python on Linux‑based smart‑bin hardware.

Required profile

• 1–2 years of professional mobile engineering experience with production‑level Kotlin.
• Strong native Android development expertise.
• Interest or experience in Kotlin Multiplatform and ability to work across Android and iOS targets.
• Startup mindset willing to touch backend code and hardware integrations while maintaining clean, production‑quality code.

Required skills

• Kotlin
• Android development
• iOS development
• Kotlin Multiplatform
• PHP
• Laravel
• Python

What we offer

• High autonomy to lead the KMP migration.
• Early‑team equity options.
• Opportunity to work on climate‑tech solutions with prestigious enterprise clients.
• Fast‑growing, founder‑led environment.