Senior Fullstack Engineer, Growth & Monetization
LangChain, IncSan Francisco, CA, United States19 hours ago
Job type
- Full-time
Job descriptionExtensive fullstack software development experience using React, TypeScript, and Go and / or Python Strong product intuition and a track record of working on monetization, pricing, or activation features Familiarity with usage metering, subscriptions, and internal tooling for pricing experiments Comfortable working with REST APIs, Postgres, Redis, and modern backend infra Startup DNA with the ability to thrive in fast-paced, zero-to-one environments Self-directed with an ownership mindset Bonus : Experience building for developers or product-led growth platforms Bonus : Familiarity with LLMs, GenAI applications, or agentic frameworks
About LangChain :
At LangChain, our mission is to make intelligent agents ubiquitous. We provide the agent engineering platform and open source frameworks developers need to ship reliable agents fast.
Our open source frameworks, LangChain and LangGraph, see over 90+ million downloads per month and help developers build agents with speed and granular control. LangSmith offers observability, evaluation, and deployment for rapid iteration, enabling teams to transform LLM systems into dependable production experiences.
LangChain is trusted by millions of developers worldwide and powers AI teams at companies like Replit, Clay, Cloudflare, Harvey, Rippling, Vanta, Workday, and more.
About the role :
LangChain is hiring a Senior Fullstack Engineer to build the foundational product features and integrations that power user acquisition, rapid experimentation, and self-serve expansion. This is a high-impact 0→1 role on a newly formed team responsible for building growth systems from the ground up. You'll work closely with product, design, GTM, and analytics to streamline activation, optimize packaging, and deliver a seamless growth story for developers and enterprise customers alike. This role will be in person 5 days / week in New York City, San Francisco, or Boston.
What you will do :
- Work across our stack (React, TypeScript, Python, Go) to deliver full-stack product features that drive growth and retention
- Build flexible experimentation systems and processes capable of targeting diverse growth metrics
- Participate in data-driven, rapid growth experiments across the user funnel from onboarding to monetization
- Design and ship new onboarding features and improvements that accelerate time to value
- Build growth levers including usage-based guardrails, smart upgrade triggers, and contextual CTAs
- Collaborate closely with product, design, GTM, and analytics teams to identify, prioritize, and execute high-impact growth opportunities
How to be successful in this role :
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Senior Fullstack Engineer • San Francisco, CA, United States
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