Johannes Geiger·Oct 24DIY Build Server with AWS Lambda MicroVMs and S3 FilesEver since AWS announced AWS Lambda MicroVMs I was thinking of use cases where Serverless stateful Docker based virtual machines can…
Johannes Geiger·Oct 16Lambda Web Functions, CloudFront, and custom domain namesIn addition to ‘classic’ Lambdas which AWS have now rebranded Event Functions, AWS now also allows to host Web Functions which (for now)…
Johannes Geiger·Oct 12Private Outbound Identity Federation within AWS VPCUnfortunately not all applications running within AWS are Serverless native and use IAM for Authorisation and Authentication, so the…
Johannes Geiger·Sep 14AWS API Gateway Integration with mutual TLSIn the past AWS API Gateways were only able to integrate with plain HTTP or HTTPS URL, now they also support integrating with backends that…
Johannes Geiger·Sep 5AWS Lambdas with Java, revisitedEver since the first time I have researched best practices, performance tweaks and tooling for the use of synchronous Java Lambdas in my…
Johannes Geiger·Sep 2Headless Machine-to-Machine Authorization with AWS CognitoAWS Cognito has been supporting machine-to-machine communication before, for users with a Client ID and Secret, requiring users to get…A response icon1A response icon1
Johannes Geiger·Jul 25AWS Lambdas, Secrets and Asynchronous UpdatesDealing with confidential data in Lambdas is a common theme. Instead of hard-coding data in code, or passing it in as environment variables…
Johannes Geiger·Jul 14Event-Driven Architecture with Aurora DSQL Change Data CaptureInspired by the DynamoDB feature of streaming change events to consumers via DynamoDB Streams the news of Aurora DSQL now generally…
Johannes Geiger·Jul 4AWS Cross-Account Credential ManagementAccess control across AWS accounts is something I’m encountering every now and then and it’s an interesting topic that adds some…
Johannes Geiger·Jun 20AWS Workload Credentials Provider for AWS Lambdas, hands-onOn June 11, 2026 AWS announced the AWS Workload Credentials Provider (AWS WCP), a client-side application that provides unified access to…
