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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

Evaluating Retrieval in RAGs: A Gentle Introduction

We introduce the many pitfalls of RAGs, including in retrieval, explain why we need systematic evaluation and provide a quick introduction to existing evaluation frameworks.

A look under GHC's hood: desugaring linear types

How GHC's design informs linear types

Interested in learning more?


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