--- title: "Ruth Kaseke (@ruekay) | Hashnode" description: "What I learn about AWS, I teach right here. Read the latest articles by Ruth Kaseke on Hashnode." url: "https://hashnode.com/@ruekay" --- @ruekay # Ruth Kaseke @ruekay · Joined March 2026 What I learn about AWS, I teach right here ### [Cut Your Lambda Bill by 37% Without Changing a Line of Business Logic](https://serverlesshuman.hashnode.dev/cut-your-lambda-bill-by-37-without-changing-a-line-of-business-logic?utm_source=hashnode&utm_medium=feed) Use Lambda Power Tuning to find your optimal memory setting, switch to ARM64 Graviton2, and cut your serverless costs by 37%,proven with real numbers. 4 min read · [serverlesshuman.hashnode.dev](https://serverlesshuman.hashnode.dev/cut-your-lambda-bill-by-37-without-changing-a-line-of-business-logic?utm_source=hashnode&utm_medium=feed) [Sep 24](https://hashnode.com/posts/cut-your-lambda-bill-by-37-without-changing-a-line-of-business-logic/6ab4d20021cef0e5703eb612) ### [You Deployed It. But Can You See What It's Doing?](https://serverlesshuman.hashnode.dev/you-deployed-it-but-can-you-see-what-it-s-doing?utm_source=hashnode&utm_medium=feed) Pipeline Part 3: Serverless Observability with AWS Powertools, X-Ray & CloudWatch 10 min read · [serverlesshuman.hashnode.dev](https://serverlesshuman.hashnode.dev/you-deployed-it-but-can-you-see-what-it-s-doing?utm_source=hashnode&utm_medium=feed) [Sep 1](https://hashnode.com/posts/you-deployed-it-but-can-you-see-what-it-s-doing/6a96b44c4502e489ae8fb24b) ### [Part 2: Securing Your Serverless Image Pipeline - Add API Gateway, Request Validation & Auth](https://serverlesshuman.hashnode.dev/part-2-securing-your-serverless-image-pipeline-add-api-gateway-request-validation-auth?utm_source=hashnode&utm_medium=feed) This is Part 2 of the Serverless Image Pipeline series. In Part 1 we built the core pipeline, S3 triggers Lambda, Lambda resizes images, stores metadata in DynamoDB, fires SNS. In this article we add 11 min read · [serverlesshuman.hashnode.dev](https://serverlesshuman.hashnode.dev/part-2-securing-your-serverless-image-pipeline-add-api-gateway-request-validation-auth?utm_source=hashnode&utm_medium=feed) [Mar 31](https://hashnode.com/posts/part-2-securing-your-serverless-image-pipeline-add-api-gateway-request-validation-auth/69cb79cc4b49f4a8e9076212) ### [Part 1: Build a Serverless Image Pipeline on AWS with Terraform & GitHub Actions](https://serverlesshuman.hashnode.dev/part-1-build-a-serverless-image-pipeline-on-aws-with-terraform-github-actions?utm_source=hashnode&utm_medium=feed) Build an event-driven image processing pipeline using AWS Lambda, S3, DynamoDB and SNS. Fully deployed with Terraform and GitHub Actions CI/CD. 8 min read · [serverlesshuman.hashnode.dev](https://serverlesshuman.hashnode.dev/part-1-build-a-serverless-image-pipeline-on-aws-with-terraform-github-actions?utm_source=hashnode&utm_medium=feed) [Mar 25](https://hashnode.com/posts/part-1-build-a-serverless-image-pipeline-on-aws-with-terraform-github-actions/69c3cc39f13efe4d1db5d8e7)