Senior Software Engineer - Identity & Authentication

About the Role
In the European Client Identity team, we are building and operating Vanguard's authentication
and MFA platform used by hundreds of thousands of clients across the UK and Europe.
This is a hands-on senior full-stack role focused on designing, building, deploying, and
operating cloud-based identity services. You will contribute across backend APIs, cloud
infrastructure, and frontend experiences — with React as the preferred frontend framework
for new UI work. You will work in a highly regulated environment where security, reliability, and
operational discipline matter.
You don't need to be an identity expert on day one — but you do need strong full-stack
fundamentals, cloud experience, and a responsible, methodical engineering mindset.

What You’ll Do
• Build and evolve backend services that support login, MFA, and client authentication
• Design and implement REST APIs ...