Sonnet Code
Platform · LLM & AI

Work with senior LangChain engineers.

LangChain engineers who ship production systems, not pitch decks.

We build production LangChain systems for US product teams every week. Senior engineers, aligned with your timezone, embedded in your process. We write LangChain the way your team will still want to read it next year.

Let's talk

Jump-start your LangChain

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LangChain in production
Why Sonnet Code for LangChain

The bar we hold ourselves to.

Senior only

Every engineer we put on your work has 5+ years shipping production code. No rotations out, no bait-and-switch.

Measured, not promised

Performance budgets, observability, and evaluation metrics are part of the build — not things we add after you ask.

Honest scoping

We'll tell you when this is the wrong tool for the job. The fastest way to lose a client is to ship the wrong thing.

What we build with LangChain

LangChain work, shipped.

New LangChain systems

Greenfield LangChain services architected for the three-year horizon — proper boundaries, tests, and documentation from day one.

LangChain modernization

Incremental migration from legacy systems, using the strangler-fig pattern so you never bet the farm on a single cutover.

LangChain scaling

Taking an existing LangChain codebase from working-for-10k-users to working-for-10M-users, without a full rewrite.

LangChain team augmentation

Senior LangChain engineers embedded in your team, shipping alongside your engineers with the same standards and PR process.

Ready to get started with LangChain? Fifteen minutes is all it takes.