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Software Innovation Lab - Tweag

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About

Data Engineering

Frontend Architecture & Infrastructure

Generative AI

High Assurance Software

Programming Languages and Compilers

Quality Engineering Test Automation

Scalable Builds

Nix

Open source

Careers

Research

Blog

Contact

Consulting services

## 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.

Explore projects

## Featured Projects

Tweagers are leading contributors to several open source projects — from functional programming languages to cross-platform frameworks.

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Nix

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.

Bazel

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.

Haskell

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.

Nickel

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

## Technical Groups

The Tweag team’s collective goal is to have a positive impact on the software industry’s practices. To do this, we apply, develop and evolve tools and techniques to better address tricky problems, and share those solutions with our clients and the software community.

Data Engineering

Frontend Architecture & Infrastructure

Generative AI

High Assurance Software

Programming Languages and Compilers

Quality Engineering Test Automation

Scalable Builds

Nix

## Featured on our blog

Continuous Performance Testing: staying fast

This post introduces Continuous Performance Testing (CPT) as an automated, CI/CD–integrated approach that provides real-time feedback and shifts testing left to catch issues early. It also highlights the value of automated load testing, thresholds (e.g., with K6) and a statistical approach for comparing with past performances.

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Introduction to Agentic Coding

Structured AI-assisted development workflows for engineering teams.

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Single-line and multi-line formatting with Topiary

The second part of a tutorial on how to quickly write a formatter for a programming language using Topiary, our open-source formatting engine based on Tree-sitter.

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## Tweag By Modus Create

Tweag is the open source program office (OSPO) of Modus Create, a global digital consulting firm that helps enterprises build competitive advantage through digital innovation. Our research enables solutions to big challenges in software development.

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