Reliable Webhooks: Signatures, Retries, and Idempotency
Design a webhook receiver that verifies signatures, handles duplicate deliveries, and recovers from worker failures without repeating side effects.
Behind the
architecture.
A closer look at how the systems work, the decisions behind them, and the lessons from each build.
Articles
Database Pagination: OFFSET vs Cursor-Based Pagination
Compare offset and cursor pagination, build a stable PostgreSQL ordering, and choose the right approach for tables and activity feeds.
REST API Security: Authentication vs Authorization
Learn how authentication differs from authorization, why object-level checks matter, and how to test API access with two user accounts.
Highly Available Web Infrastructure on AWS: How It Works and Its Availability Limits
An AWS web architecture with CloudFront, Application Load Balancer, EC2 across two Availability Zones, and Multi-AZ RDS. Exploring the request path, S3, Parameter Store, and key verification steps before claiming high availability.
AWS Serverless API Architecture: How Requests Are Processed and Data Is Stored
Tracing a request's journey through CloudFront, API Gateway, and Lambda, along with the roles of DynamoDB, S3, and Parameter Store in a serverless backend.