Join LangChain as a Senior Fullstack Engineer to build foundational product features that drive user acquisition and growth.
Posted by employer 4 months ago
First seen on Joblaze 4 months ago
Last verified on the company career page 1 day ago
Skills & Technologies
Not disclosed in this posting: years of experience, visa sponsorship.
Benefits
Joblaze summary
The Senior Fullstack Engineer on the Growth & Monetization team at LangChain focuses on developing product features that enhance user acquisition and retention. This role requires expertise in React, TypeScript, Python, and Go, along with a strong background in monetization and activation strategies. Ideal candidates are experienced developers who thrive in fast-paced environments and possess a keen product intuition. The team plays a crucial role in shaping how developers engage with LangChain's platform, driving both growth and revenue.
Joblaze insights
- Listed about 4 months ago — first seen on Joblaze June 11, 2026. Last confirmed on LangChain's careers page October 26, 2026.
- Salary band is in line with the typical range for Fullstack roles (median ~$165,000).
- Starts above 57% of 95 comparable senior fullstack roles in United States that list React we track (median $170,000 across 50 companies). See React salary trends
- React appears in 68.9% of 225 comparable senior fullstack roles in United States; Redis appears in 6.7% of 225 comparable senior fullstack roles in United States.
Quick facts
- Is the Senior Product Engineer - Growth & Monetization role remote?
- No — this is an on-site role in New York, NY.
- What's the salary range?
- LangChain lists $175,000–$240,000 for this role.
- Where is the role based?
- LangChain is hiring for this position in New York, NY.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: Go, PostgreSQL, Python, React, Redis, TypeScript.
- What seniority level is this role?
- LangChain targets senior candidates for this position.
- Is this full-time or contract?
- Full-time for this Senior Product Engineer - Growth & Monetization role at LangChain.
From the original posting
About Us
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.
What you'll do
Lead projects across our stack (React, TypeScript) while working with backend APIs (Python, Go)
Build polished, responsive user interfaces for onboarding, self-serve upgrades, and usage dashboards that delight users
Design and execute rapid, client-side UI experiments (A/B tests, feature flags) targeting key activation and conversion metrics
Partner with Product and Design to translate complex user journeys into simple, intuitive web experiences
Implement clean client-side event tracking and behavioral analytics to understand developer journeys
Build growth levers, including smart upgrade triggers, usage notifications and personalized, contextual experiences
What you'll bring
Strong mastery of modern frontend development (React, TypeScript, CSS/Tailwind)
Solid fullstack fundamentals (working with REST/GraphQL APIs, Python/Go backends, database querying and caching)
Exceptional UX intuition and a sharp eye for visual polish, micro-interactions, and developer-focused user journeys
Experience building or optimizing frontend growth engines (e.g., onboarding wizards, conversion funnels, checkout flows, A/B testing frameworks, usage metering, subscriptions)
Startup DNA with a desire to ship fast, iterate based on user data, self-directed and take end-to-end ownership
Bonus: Experience building tools for developers, PLG SaaS platforms, or design systems
Bonus: Familiarity with LLMs, GenAI applications, or agentic frameworks
Compensation
Salary Range: $165,000-$250,000 USD
Standard company text repeated across LangChain's postings is omitted here.