Mobile Software Engineer – Kotlin Multiplatform, London

About the role

Join a mission‑driven climate tech startup that replaces single‑use packaging with IoT and AI. As a Mobile Software Engineer you will lead the migration to Kotlin Multiplatform while delivering features that have already prevented 1.6 million pieces of waste.

Key responsibilities

• Lead development and maintenance of consumer and client‑facing mobile applications.
• Drive the transition from native Android/iOS apps to a unified Kotlin Multiplatform codebase.
• Build and integrate lightweight web applications with Apple/Google Wallets for container tracking.
• Collaborate with backend teams, contributing to PHP/Laravel services and occasionally supporting Python code on Linux smart‑bin hardware.

Required profile

• 1‑2 years of professional mobile experience with production‑level Kotlin and strong native Android skills.
• Practical experience or strong enthusiasm for Kotlin Multiplatform, including iOS framework and SwiftUI integration.
• Versatile, startup‑ready mindset comfortable exploring REST APIs, PHP, or Python across the product ecosystem.

Required skills

• Kotlin
• Android development
• Kotlin Multiplatform
• iOS frameworks
• SwiftUI
• REST APIs
• PHP
• Laravel
• Python
• Linux

What we offer

• Work at the forefront of sustainability with a Forbes 30 Under 30 founder.
• Ownership of the mobile roadmap, including full KMP migration and wallet integrations.
• Early‑stage equity in a fast‑growing startup.
• Impactful engineering decisions that directly reduce environmental waste.