Mobile Software Engineer (£40,000-£45,000 + Equity) at Cauli

  • Jack & Jill/External ATS
  • Apr 15, 2026
Full time I.T. & Communications

Job Description

Mobile Software Engineer (£40,000-£45,000 + Equity)

Company: Cauli - UK's largest reusable packaging provider for the food service industry.

Salary: £40,000-£45,000 + Equity

Location: London, UK

Job Description

As our first dedicated mobile hire, you will eliminate single use waste by building the infrastructure for reuse. You'll own the migration to Kotlin Multiplatform, ship features across consumer and client facing apps, and work directly with our technical lead. This is a hands on role where your code directly impacts plastic pollution reduction.

Why This Role Is Remarkable
  • Direct ownership of a high stakes migration to Kotlin Multiplatform (KMP), shaping the future architecture of our mobile ecosystem from day one.
  • Join a mission driven team that has already prevented 1.6 million pieces of waste, working with prestigious clients such as the NHS, BT, and major universities.
  • Receive meaningful early employee equity in a fast growing startup led by a Forbes 30 Under 30 founder, ensuring you share in the company's long term success.
What You Will Do
  • Lead the migration of separate iOS and Android applications into a unified Kotlin Multiplatform codebase to streamline cross platform feature delivery.
  • Develop and maintain our point of sale client application using Kotlin and integrate lightweight web apps with Apple and Google Wallets.
  • Collaborate across the stack by contributing to PHP/Laravel backend services and supporting IoT hardware running Python on Linux SBCs.
The Ideal Candidate
  • Professional experience (1-2 years) in mobile engineering with production level Kotlin skills and a solid foundation in native Android development.
  • Demonstrated enthusiasm for or experience with Kotlin Multiplatform, including the ability to handle KMP generated iOS frameworks and basic SwiftUI integration.
  • Versatile, startup ready mindset with the ability to navigate REST API integrations and a willingness to touch backend or hardware code when necessary.