Senior Software Engineer – Identity & Authentication

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 with a strong frontend focus. You will take ownership of the MFA web application – an Angular 21 + NestJS app that is the entry point for all UK Personal Investor clients. 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 Angular expertise, solid back‑end fundamentals, cloud experience and a responsible, methodical engineering mindset.

Responsibilities

• Help the team take ownership of an Angular front end, including onboarding and up‑skilling other team members on the codebase
• Build and evolve frontend experiences for login, MFA and client authentication using Angular
• Build and evolve back‑end services that support authentication and identity flows
• Design and implement REST APIs using NestJS / TypeScript
• Integrate with identity and MFA platforms (e.g. Transmit Security, Auth0)
• Deploy and operate services on AWS, using Infrastructure as Code
• Database migrations and updates
• Manage vendor‑specific software services running in AWS
• Run and maintain services in production, including writing automated tests and contributing to improving test coverage and quality
• Participate in CI/CD pipelines, deployments and operational procedures
• Work closely with product and security stakeholders to translate requirements into technical solutions
• Continuously improve engineering standards, tooling and reliability
• Provide on‑call rota participation (up to 2 weeks/month) and regular out‑of‑hours deployments (1‑3 per week, ~30‑90 minutes)

Qualifications

• Proficiency in Angular (v14+; ownership of Angular 21 codebase)
• Experience with TypeScript across front end and back end
• Solid Node.js back‑end experience with NestJS or Express for REST API development
• Understanding of authentication protocols: OAuth2.0, JWT, MFA flows
• Hands‑on experience with AWS (ECS, Lambda, CloudFront, S3, Secrets Manager)
• Familiarity with Infrastructure as Code (CloudFormation or Terraform)
• Experience with containerised workloads (Docker)
• Strong Git practices and CI/CD experience (GitHub Actions or similar)
• Nice to have: experience with identity, authentication or MFA systems
• Familiarity with Kong API Gateway or similar
• Exposure to Aurora PostgreSQL or DynamoDB
• Knowledge of microservices architectures
• Exposure to security concepts (IAM, encryption, networking)
• Experience with observability tooling (OpenTelemetry, Honeycomb, Grafana)
• Experience in regulated or enterprise environments

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