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 transition to a unified Kotlin Multiplatform codebase, ship features across consumer‑facing and client‑facing apps, and work closely with the Head of Tech.

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 of native iOS and Android apps into a unified Kotlin Multiplatform (KMP) codebase.
• Integrate lightweight web apps with Apple Wallet and Google Wallet for container tracking.
• Support the broader tech ecosystem by contributing to PHP/Laravel back‑ends and occasionally working with Python on Linux‑based smart‑bin hardware.

Required profile

• 1–2 years of professional mobile engineering experience with production‑level Kotlin and solid native Android development.
• Strong interest or experience in Kotlin Multiplatform and comfort working across Android and iOS targets.
• Versatile startup mindset, willing to touch backend code and hardware integrations while maintaining clean, production‑quality code.

Required skills

• Kotlin
• Android development
• iOS development (via KMP)
• Kotlin Multiplatform (KMP)
• PHP
• Laravel
• Python
• Apple Wallet integration
• Google Wallet integration

What we offer

• High autonomy and ownership of a critical migration project.
• Equity options as an early‑team member.
• Fast‑growing, founder‑led team working with enterprise clients such as BT and NHS Barts Trust.
• Opportunity to make a tangible impact on environmental waste reduction.