Mobile Engineer - IOS & Android

Robert Half have partnered with a Sports Manufacturing organisation based in London who are looking to engage an experienced Mobile Engineer (iOS & Android) to support the continued evolution of a mobile‐first international platform.

This is an initial 6‐month, Inside IR35 contract, focused on building and scaling mobile features that support real‐time interactions, transactional user journeys, and international expansion.

Responsibilities:

• Developing and maintaining mobile features across iOS and Android platforms
• Building functionality to support live interactions and purchasing workflows
• Implementing localisation capabilities including language, currency, and region‐specific UX
• Ensuring parity and consistency between mobile and web experiences
• Integrating mobile applications with backend services via GraphQL APIs
• Optimising application performance, reliability, and stability in real‐time environments
• Working closely with backend and frontend engineering teams to deliver shared features
• Contributing production‐ready, maintainable mobile code

Skills:

• Proven experience working as a Mobile Engineer on consumer‐facing applications
• Strong hands‐on experience with iOS (Swift) and/or Android (Kotlin)
• Experience integrating with GraphQL‐based APIs
• Experience building transactional, pricing, or e‐commerce‐driven user journeys
• Strong understanding of mobile performance optimisation and stability best practices
• Comfortable working in fast‐paced, evolving product environments
• Excellent collaboration and communication skills when working within cross‐functional teams

Contract:

• Initial 6‐month contract with potential to extend
• Inside IR35
• London‐based assignment with 3 days per week onsite