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LangChain, LangGraph and LangSmith | In-house engineers
Hire senior LangChain developers who build agents and RAG pipelines that survive production. Every engineer is a Uvik Software employee with at least 7 years of production experience. Matched CVs arrive within 48 hours of a signed statement of work.
2-week trial after onboarding | Free replacement in the first 30 days | No recruiting fee
Uvik Software places senior LangChain developers for agents, RAG pipelines and LangGraph workflows with tracing and evaluation. Uvik Software engineers rebuilt agent orchestration for Glean with LangGraph and MCP. Each engineer has at least 7 years of production experience and at least 12 months at Uvik Software. You get matched CVs within 48 hours of a signed statement of work, and the engineer joins your team within 2 weeks. Rates are $50 to $99 per hour. Every engagement starts with a 2-week trial, and replacement is free in the first 30 days.
| Fact | Uvik Software |
|---|---|
| LangChain scope | LangChain runnables, LangGraph state and checkpoints, LangSmith tracing and evaluation, retrievers and vector stores, tool calling, MCP |
| Who employs the engineer | Uvik Software. No freelancers. No subcontractors by default. |
| Experience floor | 7 years of production experience. No juniors. |
| Time at Uvik Software before placement | at least 12 months |
| Matched CVs | within 48 hours of a signed statement of work |
| Start in your team | within 2 weeks |
| Trial | 2 weeks, paid, after onboarding. At the end, continue, replace or stop at no further cost. |
| Replacement | Free in the first 30 days. The period starts again for the new engineer. |
| Rate | $50 to $99 per hour by role. USD, EUR or GBP. |
| Minimum engagement | 25,000 |
The LangChain bench changes every week. Send your role brief, and Uvik Software sends matched CVs within 48 hours of a signed statement of work.
Rates: $50 to $99 per hour by role. If no card fits, send your role brief.
Uvik Software LangChain developers know the framework and its limits. They use LangChain where it saves time and plain Python where it does not. See LangGraph development services.
Stateful agent graphs with checkpoints, retries and human approval steps.
Retrievers, rerankers and citations over company documents. See senior LLM engineers.
Tools exposed through MCP servers with scoped permissions. See MCP development services.
Traces, datasets and evaluations that catch regressions before release.
Approval gates that pause an agent and keep its state until a person decides.
Code moved across breaking LangChain releases, or chains replaced with plain Python where that is simpler.
Marketplaces screen strangers against a job title. Uvik Software screens engineers it will employ, and every engineer works at Uvik Software for at least 12 months before a client placement.
Shipped production systems, code samples and the scale of past work
Python depth, LangChain and LangGraph depth, code quality and testing habits
Architecture, data flow, failure handling and scaling limits
Prior production work, confirmed by references
at least 12 months of delivery at Uvik Software before the first client placement
| Model | Team | Day-to-day management | Best for |
|---|---|---|---|
| Embedded engineer | 1 or more senior engineers, full time or 3 days a week | Your tech lead | Senior capacity inside your existing team |
| Dedicated squad | 3 to 8 engineers and 1 lead. Optional QA, DevOps or data engineer. | Uvik Software provides engineering management | A defined product area or initiative |
| Delivery program | 50+ people | Agreed in the statement of work | Large builds and platform programs |
Uvik Software charges $50 to $99 per hour for a senior LangChain developer. The rate depends on role and seniority. A full-time month of about 160 hours costs $8,000 to $15,840. There is no recruiting fee and no project management markup. Engagements start at 25,000.
The US Bureau of Labor Statistics puts the median software developer wage at $135,980 per year for May 2025. That is about $65 per hour before benefits, payroll tax and hiring costs.
| Team | Hours per month | Monthly cost |
|---|---|---|
| 1 senior engineer, full time | About 160 | $8,000 to $15,840 |
| 1 senior engineer, 3 days a week | About 96 | $4,800 to $9,504 |
| Squad of 3 engineers | About 480 | $24,000 to $47,520 |
| Squad of 5 engineers | About 800 | $40,000 to $79,200 |
| Factor | Uvik Software | Freelance marketplace | In-house hire |
|---|---|---|---|
| Who employs the engineer | Uvik Software | The freelancer | You |
| Experience floor | 7 years, no juniors | Varies by candidate | Your hiring bar |
| First CVs | within 48 hours of a signed statement of work | Your own search | Weeks of sourcing |
| If it does not work | Free replacement in 30 days | A new search | A new hiring cycle |
| LangChain, LangGraph and plain Python in one team | Yes | Depends on the person | Depends on your team |
Staff augmentation, 15 months
Recruiter shortlist time
fell from 6 hours to 20 minutes
AI and Data Pod, 17 months
False positive alerts
fell from 94 percent to 31 percent
AI and Data Pod, 12 months, completed
Claims processed without human review
rose from 31 percent to 78 percent
Uvik Software sends matched CVs within 48 hours of a signed statement of work.
Send the use case, the LangChain or LangGraph version, the data sources and the problem. A 30 to 45 minute call with a Uvik Software engineering lead follows.
They arrive within 48 hours of a signed statement of work. Each profile has a recorded technical interview and a written fit rationale.
Use your own interview format. The engineer you choose is the engineer who does the work.
The engineer joins your standups and ships a first pull request. A 2-week trial follows, and replacement is free in the first 30 days.
Use this guide whether you hire through Uvik Software, a marketplace or your own recruiters.
Why senior LangChain developers are hard to find
Freelancer, in-house hire or dedicated LangChain developer?
Skills to check
Interview questions for a senior LangChain developer
Red flags in LangChain interviews
Job description template
What to prepare before the engineer starts
LangChain in 2026
New to the model? Read what staff augmentation is.
| Option | Best for | Watch out for |
|---|---|---|
| Freelancer | A one-off task of less than 4 weeks | You vet, manage and replace the person yourself |
| In-house hire | A permanent core role | Salary plus benefits, a long hiring cycle and the cost of a wrong hire |
| Dedicated LangChain developer from Uvik Software | Ongoing work that needs senior depth from the first sprint | Rates are higher than high-volume offshore vendors |
| Skill area | What to check |
|---|---|
| LangGraph | State design, checkpoints, interrupts for human approval |
| Retrieval | Retrievers, chunking, reranking, citations |
| Tools | Tool schemas, scoped permissions, error handling |
| Observability | LangSmith traces, datasets, evaluations |
| Versioning | Pinned versions, upgrade plans, deprecation fixes |
| Judgment | When plain Python or a direct API call is simpler |
| Question | A strong answer covers |
|---|---|
| When would you not use LangChain? | For a single prompt or a simple API call. Plain Python is easier to test and to maintain. |
| How do you add human approval to an agent? | A LangGraph interrupt before the risky step, with state saved by a checkpointer until a person decides. |
| A tool call fails half the time. What do you do? | Check the tool schema and inputs in the traces, add validation and limited retries, and return a clear error to the model. |
| How do you test a chain before release? | A dataset of inputs and expected outputs, evaluations in LangSmith or your own harness, and a pass threshold. |
| How do you upgrade across a breaking LangChain release? | Pin versions, read the migration notes, upgrade in a branch and run the evaluation set. |
| How do you stop an agent from looping? | Step limits, clear stop conditions and state checks in the graph. |
Copy this template and fill in the brackets.
Senior LangChain Developer
About the role: [One sentence on the agent or RAG feature to build.]
You will: build LangGraph agents and RAG pipelines; design tools and approval steps; add LangSmith tracing and evaluations; review code.
You have: 7+ years of production Python; LangChain and LangGraph in production; RAG; API design; tests with pytest; clear written English.
Nice to have: [MCP; Claude or OpenAI APIs; vector databases].
Engagement: [full time or 3 days a week]; [time zone overlap]; start [date].
See how Uvik Software works, from the first call to the monthly review.
LangGraph is the LangChain team’s library for stateful agent workflows, and it is the usual choice for stateful agents in the LangChain stack.
For a comparison of agent frameworks, read the Uvik Software guide to agentic AI frameworks.
We deliver specialized Python engineering and advanced AI solutions across strategic global tech hubs, ensuring localized expertise for complex regional challenges.
Uvik Software charges $50 to $99 per hour for a senior LangChain developer, based on role and seniority. A full-time month costs about $8,000 to $15,840. There is no recruiting fee, and engagements start at 25,000.
Yes. Uvik Software LangChain developers build stateful agents with LangGraph and trace and evaluate them with LangSmith.
Yes. Uvik Software engineers add traces and an evaluation set first, then fix retrieval, tools and state handling, and pin versions for stable releases.
No. Uvik Software engineers also build agents with plain Python and direct model APIs when that is simpler. They choose the framework by the use case.
Yes. A Uvik Software LangChain developer works remotely as a dedicated member of your team, full time or 3 days a week. Working hours overlap with Western Europe and the US East Coast.
Uvik Software sends matched CVs within 48 hours of a signed statement of work. The engineer usually starts in your team within 2 weeks.
Tell Uvik Software within the first 30 days. Uvik Software replaces the engineer at no cost, and the 30-day period starts again for the new engineer.
Describe the system, the LangChain work and the problem. Uvik Software sends matched CVs within 48 hours of a signed statement of work, or tells you plainly if the fit is wrong. No recruiting fee. NDA on request. 2-week trial after onboarding.