LangChain and LangGraph are good at wiring models, retrievers and tools together, and easy to turn into an unmaintainable tangle. We build with them when they help, keep the chains small and traceable, and use plain code where a framework adds nothing.
Tell us what you want to build. A senior engineer sends back a scope and a fixed price within two business days, no obligation.
What we build
Loaders, splitters, retrievers and reranking set up for your documents, with answers that cite their sources.
Multi-step workflows that can branch, retry, wait for a human and resume, with state stored properly so a crash does not lose work.
LangSmith or open-source tracing so you can see exactly which step failed and why.
Taking over a prototype that grew too fast, adding tests, and simplifying it until the team can change it safely.
Fit
Process
For existing code we start with a short review. For new builds we sketch the graph before writing it.
One end-to-end path first, traced and tested, before adding branches.
A test set run on every change, with failures traced back to the step that caused them.
Clear structure, documentation and patterns your developers can extend.
Pitfalls
We have seen these enough times to plan around them from the start.
Next step
Want to see similar work? Browse our case studies or tell us what you are working on.
FAQ
LangChain for building blocks such as loaders, retrievers and model wrappers. LangGraph when you need a stateful, multi-step flow with branching, retries or human approval.
It can be, with discipline: tracing, tests, pinned versions and small, readable chains. Most production problems we see come from how it was used, not from the library.
Yes. We usually start with a review, then stabilise the parts that fail most and add an evaluation set so improvements can be measured.
Yes. For document-heavy retrieval LlamaIndex is sometimes the cleaner choice, and the two can work together.
Keep reading
Indicative ranges only get you so far. Tell us the specifics and get a scope and a fixed price in two business days.