Company: IAG Loyalty
Location: London
Posted: April 17th, 2026
We’re IAG Loyalty - one organisation with two ambitious, growing divisions across Loyalty and Holidays. Each has its own goals, strategy and team, but together we’re united by a shared vision to create a more rewarding world of travel and experiences.
Our Loyalty division is home to Avios, the global loyalty currency, enabling millions of members to collect and spend rewards across travel, retail and financial services.
Our Holidays division including British Airways Holidays and Iberia Vacaciones, brings together trusted brands, connecting customers to thousands of destinations worldwide through seamless, end-to-end travel experiences.
We’re on an exciting journey of growth and transformation – we’re going places.
Join IAG Loyalty and help shape the continued development of the Avios App, a global loyalty platform used by millions of travellers worldwide. As a Senior Full Stack Engineer, you’ll own the delivery of complex, high-impact features that enhance the mobile experience across the Avios ecosystem.
Working within a dedicated mobile product team, you’ll design and build end-to-end solutions across React Native, .NET/C#, and AWS, bringing strong technical judgement and helping guide implementation approaches within the team. You’ll be part of a modern, agile engineering environment where collaboration, curiosity, and continuous improvement are encouraged.
This is a chance to work on a high-traffic consumer application with real impact, supporting a platform that connects with major airline partners including British Airways, Iberia, and Aer Lingus, while mentoring other engineers and contributing to a strong engineering culture.