Mobile Software Engineer – Kotlin Multiplatform (London)

About the role

Join a mission‑driven climate‑tech startup that is replacing single‑use packaging with IoT and AI solutions. As a Mobile Software Engineer you will lead the migration to Kotlin Multiplatform and ship 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 by contributing to PHP/Laravel services and occasionally supporting Python code on Linux smart‑bin hardware.

Required profile

• 1‑2 years of professional mobile development experience with production‑level Kotlin and strong native Android skills.
• Practical experience or strong enthusiasm for Kotlin Multiplatform, including ability to work with iOS frameworks and SwiftUI.
• Startup‑ready mindset comfortable exploring REST APIs, PHP, or Python to solve cross‑stack problems.

Required skills

• Kotlin
• Android development
• Kotlin Multiplatform (KMP)
• SwiftUI / iOS frameworks
• REST APIs
• PHP
• Laravel
• Python

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 digital‑wallet integration.
• Early‑stage equity in a fast‑growing startup.
• Direct impact on reducing environmental waste at scale.