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Product Manager, LangSmith

LangChain - San Francisco, CA, United States - In-office - posted 2026-10-01

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Salary: USD 180,000 - 215,000 / annual

LangChain is hiring a Product Manager to own key areas of LangSmith, the company's core observability, evaluation, and deployment platform for AI systems. LangSmith serves 6,000+ active customers including 5 of the Fortune 10 and 35% of the Fortune 500 overall. In this role, you'll sit at the intersection of user experience and production infrastructure, partnering with engineers to build intuitive features that solve deeply technical problems—versioning complex prompt chains, debugging multi-step agent failures, designing evaluation systems that scale from 10 to 10,000 test cases. You'll work directly with customers ranging from early-stage startups shipping their first agent to enterprises running mission-critical AI systems, understanding where the platform breaks down and what capabilities unlock new workflows. Key responsibilities include: - Own the roadmap for a core area of the LangSmith platform - Work with customers to understand challenges and define new product features - Partner with engineering to define scope, make technical tradeoffs, and ship high-impact features quickly - Help shape product strategy alongside founders and leadership LangChain raised $125M at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures. The platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, Sandboxes), open-source frameworks (LangChain, LangGraph, Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. The company has 100M+ monthly open-source downloads. REQUIREMENTS: - 3+ years of product management or engineering experience, ideally building developer tools, infrastructure products, or technical SaaS platforms - Deeply technical—able to hold your own in conversations about API design, system architecture, data pipelines, and debugging production issues - Bias toward action—preference for shipping, learning, and iterating over building the perfect solution upfront - Strong written and verbal communication skills to align cross-functional teams around a shared vision NICE TO HAVE: - Computer Science, Engineering, or equivalent technical background - Previous experience at a high-growth startup or developer-focused company - Hands-on experience building with LLMs, agents, or AI applications

About LangChain

AI / Data / Infrastructure — developer platform and framework for building LLM applications and agents.

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