Senior Identity & Access Management Engineer Typescript, C#, OAuth2, AWS IAM, Zero Trust

Outstanding opportunity to join this global B2B SaaS leader as a Senior Full Stack IAM Engineer, developing secure, scalable identity and access management across multiple components and geographies. This permanent role offers the chance to shape the Zero Trust authentication and authorization services in a cutting-edge, AI-driven environment.

About the Role:

Own the IAM platform, designing and developing integrations with OAuth providers

Build full-stack zero trust security features in TypeScript, C#, AWS IAM

Deliver secure login, SSO, MFA, RBAC/ABAC, and tenant isolation at scale, leveraging AWS services (Lambda, IAM, CloudFront, API Gateway, CDK)

Collaborate across Product, Security, and Engineering teams, embed identity into new features, and uphold engineering excellence through CI/CD, testing, and incident response

Required experience:

Strong full-stack development skills (TypeScript, C#, AWS)

An in-depth security mindset with a thorough understanding of Zero Trust & OAuth2

Proven experience with OIDC-compliant IDPs (Auth0, Okta, Cognito)

Solid AWS expertise (IAM, Lambda, API Gateway, CDK)

A proven background in building RESTful APIs that interact with IDPs

Security-first mindset with experience in secure coding, threat modelling, and protecting PII

Ability to mentor, collaborate, and lead with hands-on problem-solving

£85k-£90k + bonus + benefits. 95% remote & London