About the role
About Us At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale. With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and
how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world. Today, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open source downloads, 6,000+ active LangSmith customers, and 5 of the Fortune 10 use LangSmith in production (+ 35% of the Fortune 500 overall), including teams at Klarna, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, LinkedIn, Monday.com, Nvidia, and Bridgewater.
About
the Team The Growth & Monetization team focuses on how developers discover, adopt, and scale with LangChain’s products. We work across the full stack to improve onboarding, activation, and usage while building the systems that power billing, pricing, and monetization. This team partners closely with product, design, and go-to-market teams to understand developer behavior and translate those insights into product improvements that drive adoption and revenue. Our work directly shapes how developers and organizations move from experimentation to production on the LangChain platform.
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'll 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 What you'll bring Extensive 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
Compensation Salary Range: $175,000-$240,000 USD
Compensation Philosophy: We offer competitive
compensation that includes base salary, variable
compensation for relevant roles, meaningful equity,
benefits, and
perks. Actual
compensation and offerings will vary based on role, level, and location. Team members in the EU, UK, and APAC receive locally competitive
benefits aligned with regional norms and regulations.
Benefits
Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.
About LangChain
LangChain offers a comprehensive platform designed for the entire agent engineering lifecycle, enabling teams to build and ship reliable agents to production. Its open-source products include the LangChain framework for pre-built architecture and model integrations, and LangGraph for building custom agent workflows. The platform features LangSmith, which provides observability and tracing for debugging, evaluation tools to improve agent quality with test sets and feedback, and deployment infrastructure built for long-running workloads and human oversight.
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Job details
Salary
$165,000 - $250,000
Location
New York, NY
Funding
Total raised
$160M
Last stage
Growth
Investors
Founders
Harrison Chase
Founder & CEO
What happens next.
No applications, no recruiter spam. Just the intro.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.