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

About the role

Join a mission‑driven climate‑tech startup as the lead mobile engineer. You will own the migration to a unified Kotlin Multiplatform codebase and ship features for both consumer‑facing and client‑facing applications.

Key responsibilities

• Develop and maintain mobile applications using Kotlin, including a point‑of‑sale client app and consumer tools.
• Architect and execute the migration from native iOS/Android apps 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 delivering clean, production‑quality code.

Required skills

• Kotlin
• Android development
• iOS development (via KMP)
• Kotlin Multiplatform
• PHP
• Laravel
• Python

What we offer

• High autonomy leading the migration to a unified KMP codebase.
• Early‑stage equity options as an early team member.
• Opportunity to work with prestigious enterprise clients such as BT and NHS Barts Trust.
• Fast‑growing, founder‑led team focused on solving a critical environmental crisis.