Lambda on Lambda: Serverless Haskell on AWS

# Lambda on Lambda: Serverless Haskell on AWS | Blog Source: [http://jackkelly.name/blog/archives/2026/06/24/lambda_on_lambda_serverless_haskell_on_aws/index.html](http://jackkelly.name/blog/archives/2026/06/24/lambda_on_lambda_serverless_haskell_on_aws/index.html) Posted on June 24, 2026 by Jack Kelly Earlier this week, I gave a talk at the[Melbourne Compose Group](https://luma.com/melbourne-compose)\([mailing list](https://groups.google.com/g/melbourne-compose-group)\) about using Haskell to implement[AWS Lambda](https://aws.amazon.com/lambda/)functions\. Lambda is AWS’s “function\-as\-a\-service offering”, where your code runs in an isolated “microVM” on AWS\-managed infrastructure and you pay only for the resources used while your code runs\. As a mature AWS service, Lambda has a lot of features and knobs, and many of the blog posts I’ve read about deploying to Lambda were closer to “draw two circles” than[“how to draw the owl”](https://knowyourmeme.com/memes/how-to-draw-an-owl)\. I’ve wanted to address this gap for a long time\. To prepare for the talk, I built an[end\-to\-end example](https://git.sr.ht/~jack/lambda-on-lambda)of how to build Haskell functions \(plus some useful AWS utilities\) into OCI\-format containers, upload those containers to AWS, and use OpenTofu to configure Lambda Functions that use them\. It’s heavily commented and I hope it’s useful\.[Slides from the talk](http://jackkelly.name/talks/lambda-on-lambda/lambda-on-lambda.pdf)are also available\. The Compose organisers and audience were great — lots of good questions and many of us kept the conversation going over dinner on Lygon St\. If you’re at all interested in FP, I’d recommend checking them out\.