01
Functional Programming
We help teams apply Haskell and functional programming to production systems, language tooling, compilers, and high-assurance software.
Engineering leverage for ambitious software teams
We help engineering organizations overcome technical bottlenecks that stand in the way of success. Our engineers bring research-informed, production-proven expertise in functional programming, reproducible infrastructure, and scalable build systems.
Where we can help
02
Reproducible infrastructure
We help organizations build reproducible development environments, infrastructure, and delivery pipelines with confidence using Nix.
03
Scalable Build Systems
We help engineering teams scale builds, improve developer productivity, and manage large codebases through effective Bazel adoption.
04
Applied Research & Formal Methods
We help teams tackle complex engineering challenges through rigorous design, advanced software development, and mathematically grounded approaches to correctness.
Tweag has a long record in Haskell and functional programming, from production systems to language tooling and compiler work. We help teams use Haskell where strong abstractions, correctness, and maintainable complexity matter.
- GHC, compiler engineering, language extensions, and WebAssembly tooling.
- Functional architecture for production services, platforms, and data systems.
- Liquid Haskell, Linear Haskell, type systems, and high-assurance development.
- Haskell ecosystem tooling including Ormolu, Cabal, and rules_haskell.
We help teams make environments, builds, and deployments reproducible with Nix. Our engineers work across developer experience, packaging, CI, and infrastructure so organizations can reduce drift and ship with confidence.
- Reproducible development environments for distributed engineering teams.
- Nix flakes, packaging, overlays, and dependency management.
- CI and delivery pipelines built around reliable, repeatable inputs.
- Migration support for teams adopting Nix in existing platforms.
We support engineering organizations that need faster, more reliable builds at scale. Tweag helps teams adopt Bazel, improve existing workspaces, and build the practices needed for long-term developer productivity.
- Bazel migrations for monorepos and polyglot codebases.
- Remote caching, remote execution, and CI performance improvements.
- Rule design, dependency modeling, and build graph maintenance.
- Developer workflows that make scalable builds practical day to day.
We bring research depth into production engineering. Tweag teams help clients evaluate new approaches, prototype critical systems, and use formal reasoning where defects are expensive or ambiguity slows delivery.
- Programming language design, compilers, and type systems.
- Formal specification, verification, and correctness-focused development.
- Technical discovery for ambitious product and platform initiatives.
- Architecture guidance for systems with unusual constraints.
Trusted by engineering teams
Let’s solve your hardest problem.
Talk to Tweag about build systems, reproducible infrastructure, formal methods, or complex software architecture.
Contact us