Senior C# IAM Developer - Auth0, CIAM, AWS - Outside IR35
- Hiring Organisation
- Smart Sourcer Limited
- Location
- City of London, London, United Kingdom
- Employment Type
- Contract
- Contract Rate
- From £700 to £750 per day
.Net Own and evolve our Auth0 identity platform: tenant configuration, flows, hooks, rules, MFA, RBAC Design and maintain token-based security models (OIDC, OAuth2, JWT lifecycle, refresh strategies) Build secure event-driven and serverless components ( AWS Lambda, SNS/SQS, EventBridge ) Lead secure coding practices, code reviews, and threat modelling … production systems in C# & .NET Deep knowledge of Auth0 (Actions, Rules, Hooks, Universal Login, MFA, RBAC, custom claims) Solid understanding of OAuth2 , OIDC , SAML , JWT , and modern identity patterns Experience with AWS serverless ( Lambda, API Gateway, DynamoDB, EventBridge ) Strong grasp of secure coding principles: input validation, secrets management, least privilege ...