About the job
About Us:
At LangChain, we are on a mission to revolutionize the presence of intelligent agents in everyday applications. We provide robust solutions for agent engineering, enabling developers to transform their prototypes into production-ready AI agents that organizations can depend on. Originating as widely embraced open-source tools, we have expanded to also deliver a comprehensive platform for building, evaluating, deploying, and managing agents on a large scale.
Our tools, including LangChain, LangGraph, LangSmith, and Agent Builder, are trusted by teams developing real AI products across various sectors, from startups to large enterprises. We are proud that millions of developers utilize LangChain to support AI initiatives at prominent companies such as Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.
Having raised $125M in Series B funding from leading investors like IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we are at an exciting juncture, continuously innovating and expanding our product offerings. Each team member has the opportunity to make a significant impact on our growth and collaborative culture. At LangChain, your contributions can redefine how technology interacts with the real world.
About the Role:
We are looking for a Senior Fullstack Engineer to join our newly established team focused on developing foundational product features and integrations that enhance user acquisition, foster rapid experimentation, and enable self-service expansion. This pivotal role involves building growth systems from the ground up, working closely with cross-functional teams including product, design, GTM, and analytics to streamline user activation, optimize product offerings, and create a seamless growth narrative for both developers and enterprise clients. This position requires on-site presence five days a week in New York City, San Francisco, or Boston.
Your Responsibilities:
Engage across our technology stack (React, TypeScript, Python, Go) to develop full-stack product features that enhance growth and user retention.
Create adaptable experimentation systems and processes that target a variety of growth metrics.
Engage in data-driven, rapid growth experiments throughout the user journey, from onboarding to monetization.
Design and implement new onboarding features and enhancements that quicken the user’s time to value.
Develop growth mechanisms, including usage-based guardrails, intelligent upgrade prompts, and contextual calls-to-action.
Collaborate closely with product, design, GTM, and analytics teams to identify, prioritize, and execute impactful growth initiatives.

