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Reduce GitHub runner costs by leveraging EC2 spot instances

We learned the hard way, that GitHub Actions is getting expensive when using GitHub-hosted runners. Back in 2023, we decided to build a solution for self-hosted runners on AWS to reduce costs. A few months later, we released HyperEnv to the public. Over...

10th anniversary - our story

Today, we -the Wittig brothers- are celebrating the 10th anniversary of our company. Here we want to tell our story and say thank you! PrehistoryIn 2012, Michael and I joined the same team at Tullius Walden Bank with the mission to build a trading plat...

How to move a DynamoDB table to another region or account?

How to move data from one DynamoDB table to another? For example, when it becomes necessary to move a DynamoDB table to another account or region. In the following blog post, I will discuss three different options to move DynamoDB tables by backing up a...

Optional DependsOn with CloudFormation: Metadata to the rescue

When working with AWS CloudFormation, sometimes it’s necessary to incorporate optional dependencies into your template. Recently, I encountered a situation where I had to build a single CloudFormation template to manage both a VPC and an application—tho...

Are you missing an AWS resource in Terraform? Try awscc provider!

There is nothing more frustrating than running into gaps in resource coverage when working with Infrastructure as Code tools like Terraform or CloudFormation. Not being able to use the latest features to solve a challenge is demotivating. Recently, I di...

Review: Amazon GuardDuty Malware Protection for S3

Imagine users uploading attachments directly to S3 to share them with other users. Or partners uploading data to your S3 bucket to trigger business processes that download directly from S3. What could go wrong? A file uploaded to S3 could be infected. M...

Deploying Self-Hosted Runners for GitHub Enterprise Server on AWS: A Guide to Efficient CI/CD

GitHub Actions is a continuous integration and continuous deployment (CI/CD) platform provided by GitHub. It allows you to automate your software development workflows by building, testing, and deploying code directly from your GitHub repository. Many c...

How to write unit tests when using the AWS JavaScript SDK v3?

Writing unit tests for code that interacts with the AWS JavaScript SDK v3 comes with two major benefits. Obviously, writing unit tests ensures you catch bugs early and therefore increase the quality of your code. Also, writing unit tests enables you to ...

Tidying up after failed Terraform tests

Automated tests are making their way into Infrastructure as Code projects. Recently, I’ve implemented tests with Terraform’s test framework which was released in October 2023. However, I ran into the issue that Terraform could not remove all AWS resourc...

How to monetize an API on AWS?

Did you develop an API and want to sell access? Here is how I combined Amazon’s API Gateway (REST APIs) and FastSpring, a payment and subscription platform, to monetize our API for malware scanning. Luckily, you can apply the pattern to any REST API. T...