Mobile Software Engineer – Kotlin Multiplatform

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 and ship features across 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 to a unified Kotlin Multiplatform (KMP) codebase, integrating lightweight web apps with Apple and Google Wallets 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.
• Collaborate directly with the Head of Tech to build infrastructure that reduces environmental waste.

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 delivering clean, production‑quality code.

Required skills

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

What we offer

• Lead the migration of native apps into a unified KMP codebase with high autonomy.
• Join a fast‑growing, founder‑led team serving enterprise clients such as BT and NHS Barts Trust.
• Competitive salary (£40k–£45k) plus meaningful equity options.
• Opportunity to make a tangible impact on a critical environmental crisis.