Auth0 to Amazon Cognito Migration
Published: 2026
This project involved migrating an application’s authentication system from
Auth0 to Amazon Cognito to reduce vendor dependency
and better align with AWS-native services.
The migration covered mapping existing Auth0 user flows (sign-up, sign-in, session handling,
and role-based access control) to Cognito User Pools and Identity Pools. Application code
was updated to support AWS Cognito JWT validation and authentication workflows.
Key challenges included handling secure user migration, maintaining session continuity,
and ensuring zero downtime during cutover from Auth0 to Cognito.
After migration, the system benefited from improved AWS integration, reduced third-party
dependency, and centralized identity management within the AWS ecosystem.
Architecture Diagram
graph TD
subgraph Client_Tier [Client Tier]
FE[TypeScript FE]
end
subgraph Auth_Tier [Identity Tier]
CUP[Cognito User Pool]
ML[Managed Login UI]
end
subgraph API_Tier [API & Logic Tier]
AS[AppSync GraphQL API]
L1[Lambda Resolver A]
L2[Lambda Resolver B]
end
subgraph Event_Tier [Event-Driven Tier]
EB[EventBridge Bus]
L3[Async Worker Lambda]
SQS[SQS / SNS]
end
%% Auth Flow
FE -- "1. Login Redirect" --> ML
ML -- "2. Auth Success" --> CUP
CUP -- "3. Issue ID Token" --> FE
%% API Flow
FE -- "4. GraphQL Request + ID Token" --> AS
AS -. "5. Authorize Token" .-> CUP
AS -- "6. Invoke" --> L1
AS -- "6. Invoke" --> L2
%% Event Flow
L1 -- "7. PutEvents" --> EB
L2 -- "7. PutEvents" --> EB
EB -- "8. Rule Match" --> L3
EB -- "8. Rule Match" --> SQS
%% Dev Flow
GH[GitHub Repo] -. "CI/CD" .-> FE
GH -. "CI/CD" .-> L1