Full-Stack Engineer (App Team)

Salary: £29,000 - 69,000 per year

Requirements:

• Experience building applications in a commercial engineering environment
• Strong experience in either React Native or .NET/C#
• Working experience in the other, with the ability to understand, navigate and contribute with support
• Interest in developing full stack capability across mobile and backend
• Understanding of APIs and modern development practices
• Exposure to cloud platforms, with AWS preferred
• Strong communication and collaboration skills
• A proactive mindset and willingness to learn and grow

Responsibilities:

• Contribute to the development of features across our Avios App, working across mobile and backend systems to deliver reliable, high-quality functionality
• Work within a cross-functional product team to build and improve features across React Native and .NET/C#
• Partner with engineers, QA, Product Managers and Designers to deliver features that meet customer and business needs
• Be involved in the full development lifecycle, from implementation and testing through to deployment and ongoing improvements
• Take part in code reviews, technical discussions and team ceremonies
• Learn from more experienced engineers while contributing your own ideas
• Grow your ownership and impact across both mobile and backend development over time

Technologies:

• AWS
• Backend
• C#
• Cloud
• Support
• Mobile
• REST
• React
• React Native
• ASP.NET
• Fullstack

More:

We are IAG Loyalty, a growing organisation with two divisions across Loyalty and Holidays, 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 used by millions of members, and our Holidays division includes British Airways Holidays and Iberia Vacaciones, connecting customers to destinations worldwide. This Full Stack Engineer role sits within our Loyalty division and is based in our London office. We offer a hybrid working approach called The Blend, with at least two days per week in the office and the rest from home. We are a small, high-performing team where people support each other, move fast, and learn as we go. We are committed to diversity, inclusion and creating a workplace where people feel they belong and are valued for their perspective.

last updated 34 week of 2026