Improving the craft of software engineering

We are on a mission to improve developer experience (DX) and data-centric workflows (MLOps). Tweag is a collaborative space where engineers and researchers join forces to apply new ideas — all as open source.


Many thought leaders of the Nix community are Tweagers. Together with our clients, we contribute much of the technical roadmap, from better reproducibility and performance to new use cases and developer tools.


We were among the first outside of Google to adopt Bazel. We are recognized community experts. We have contributed key features and new programming language support to Bazel. We did this for ourselves and now we can do it for you.


We are among the top contributors to GHC, a mature, state-of-the-art compiler for Haskell. Choosing Haskell is a path to more correct, scalable code for industries where mistakes matter. We created language interop with Java, JavaScript, C and R, we make Haskell run in your browser, and do the heavy lifting in your analytics pipelines.


Write complex configurations. Modular, correct and boilerplate-free.

Featured on our blog

Cloud Native Computing in 2024—feeling the pulse at Kubecon

We just came out of Kubecon 2024. Here are our impressions of the trends and evolutions in infrastructure, configuration management and cloud native computing

Evaluating retrieval in RAGs: a practical framework

We introduce an experimental framework for assessing RAG retrieval and explain its main components including benchmark creation, evaluation metrics, parameter space and experiment tracking. Whether you're deep in the field or just starting, this post is your gateway to understanding and improving RAG retrieval performance.

Software Identifiers through the eyes of Nix

This is an answer to a request for comments issued by CISA about software identifiers that CISA encouraged me to publish as a separate blog post.

Interested in learning more?


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