Senior Fullstack Engineer, AI Observability & Evals Platform
About this role
LangChain is seeking a Senior Fullstack Engineer to join their team in San Francisco, California for a full-time, in-person role. This position is ideal for an experienced developer with a background in building complex platform products using Python, TypeScript, and modern web frameworks.
Role Overview
This position involves driving the technical direction of LangSmith, a commercial observability and evaluation platform for AI applications. The professional in this role will partner closely with product teams, design staff, enterprise customers, and internal stakeholders to build and scale core platform features while maintaining high engineering standards.
Key Responsibilities
Requirements
Nice to Have
Skills and Tools
Salary and Benefits
The annual base salary range for this position is $175,000 to $240,000 USD, accompanied by meaningful equity. Comprehensive benefits include medical, dental, and vision coverage, flexible time off, a 401(k) plan, and meals provided on in-office days in the US.
About the Company
LangChain builds foundational agent engineering tools designed to help developers transition AI prototypes into reliable production systems. Backed by $125M in Series B funding from prominent investors, the company offers open-source frameworks like LangChain and LangGraph alongside the commercial LangSmith platform, serving thousands of active customers globally.
How to Apply
Visit the official LangChain careers page to submit an application for this position.
Skills and tech stack
Questions candidates ask
Where is the Senior Fullstack Engineer position located?
This role is located in San Francisco, California, and requires working in person 5 days a week.
What is the salary range for this role?
The annual salary range is $175,000 to $240,000 USD, plus meaningful equity and benefits.
How many years of experience are required?
Candidates must have 5+ years of software engineering experience working on complex platform products.
What tech stack is used for this position?
The stack includes Go, Python, React, TypeScript, Postgres, and Redis.
What benefits are included for US employees?
Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, and meals on in-office days.