lambda

6 posts

AWS Lambda + S3 Signed URLs: The Battle-Tested Solution for Large File Uploads

How we went from 30-second Lambda timeouts killing our video platform to handling 10GB+ file uploads seamlessly with S3 signed URLs. Complete implementation with CDK, security considerations, and production lessons learned.

Death of the Factory Pattern: How We Eliminated 40% of Our Node.js Code with Pure Functions

After removing all factories, services, and dependency injection from our Node.js microservices, we shipped 3x faster with 65% fewer bugs. Here's why functions beat classes for event-driven architectures.

Cloud Computing

May 4, 2025

event-driven

functional-programming

lambda

CQRS with Serverless: How I Cut DynamoDB Costs by 70% and Improved Performance

Real-world CQRS implementation with AWS Lambda, EventBridge, and DynamoDB. Learn from my mistakes implementing event sourcing, handling eventual consistency, and debugging distributed systems in production.

Migrating from Serverless Framework to AWS CDK: Part 3 - Lambda Functions and API Gateway

Deep dive into migrating Lambda functions, API Gateway configurations, request validations, and error handling from Serverless Framework to AWS CDK with practical examples.

Building AWS Serverless with TypeScript: Lessons from 3 Years of Lambda at Scale

Why I moved from Express.js to Lambda, the costly mistakes I made along the way, and the TypeScript patterns that saved my team thousands in AWS bills.

Zod + OpenAPI + AWS Lambda: The $80K Bug That Taught Me Schema-First Development

How a 'simple' API change cost us $80K in enterprise client integration failures, why documentation drift kills businesses, and the production-tested system that generates OpenAPI specs from Zod schemas automatically.