Senior Product Engineer - Growth & Monetization
$175k - $240k • New York, NY • FullTime
Posted 3mo ago
About the job
LangChain is seeking a Senior Fullstack Engineer to join the newly formed Growth & Monetization team. This high-impact role will focus on building foundational product features and integrations that drive user acquisition, rapid experimentation, and self-serve expansion. You will work across the full stack, from polished user interfaces to backend APIs, to create seamless growth stories for developers and enterprise customers. This is a 0→1 opportunity to build growth systems from the ground up, partnering closely with product, design, GTM, and analytics teams to streamline activation, optimize packaging, and deliver a delightful developer experience.
Responsibilities
- Lead projects across the stack, including React, TypeScript, Python, and Go.
- Build polished, responsive user interfaces for onboarding, self-serve upgrades, and usage dashboards.
- Design and execute rapid, client-side UI experiments (A/B tests, feature flags) to optimize key metrics.
- Translate complex user journeys into simple, intuitive web experiences in partnership with Product and Design.
- Implement clean client-side event tracking and behavioral analytics.
- Build growth levers such as smart upgrade triggers, usage notifications, and personalized experiences.
Requirements
- Strong mastery of modern frontend development (React, TypeScript, CSS/Tailwind).
- Solid fullstack fundamentals, including working with REST/GraphQL APIs, Python/Go backends, and database querying/caching.
- Exceptional UX intuition with a sharp eye for visual polish and micro-interactions.
- Experience building or optimizing frontend growth engines (e.g., onboarding wizards, conversion funnels, A/B testing frameworks).
- Startup DNA with a desire to ship fast, iterate based on user data, and take end-to-end ownership.
- Familiarity with LLMs, GenAI applications, or agentic frameworks is a bonus.
- Experience building tools for developers or PLG SaaS platforms is a bonus.
Benefits
- Medical, dental, and vision coverage
- Flexible vacation
- 401(k) plan
- Meals on in-office days
- Meaningful equity
- Variable compensation