Python OSS Engineer

LangChain is dedicated to making intelligent agents ubiquitous by providing an agent engineering platform and open-source frameworks like LangChain and LangGraph. These frameworks are widely used for building reliable LLM systems. The company is seeking a Python OSS Engineer to serve as a core maintainer for the Python packages. Key responsibilities include enhancing core abstractions, improving runtime, updating documentation, resolving user issues, and developing example applications. Candidates should possess over five years of experience in software engineering or applied machine learning, along with strong communication skills, and thrive in a dynamic, ownership-driven environment.

Must Have

• 5+ years of software engineering or applied machine learning background
• Strong written and oral communication skills
• Ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholders
• Can thrive in a fast-moving environment
• Ownership-minded
• Responsible for maintaining and improving the LangChain Python package
• Improving the core abstractions and runtime of the `langchain` and `langgraph` packages
• Improving documentation
• Answering user questions and resolving issues
• Use `langchain` to build example applications

Perks & Benefits

• Competitive compensation
• Base salary
• Meaningful equity
• Health and dental coverage
• Flexible vacation
• 401(k) plan
• Life insurance

Location

San Francisco, CA, Boston, MA

Employment Type

Full time

Location Type

On-site

Department

Engineering

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

In person 5 days/week in San Francisco, CA or Boston, MA (SF preferred)

We’re looking to add a core maintainer to the LangChain team. This person would be responsible for maintaining and improving the LangChain Python package.

• Improving the core abstractions and runtime of the `langchain` and `langgraph` packages
• Improving documentation
• Answering user questions and resolving issues
• Use `langchain` to build example applications

How to be successful in this role

• 5+ years of software engineering or applied machine learning background
• Have strong written and oral communication skills, with the ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholders
• Can thrive in a fast-moving environment. Views unstructured environments as an opportunity to figure out the most impactful work and define the future success of the company
• Are ownership-minded. You excel at managing your work efficiently and effectively without the need for close supervision

Compensation & Benefits

• We offer competitive compensation that includes base salary, meaningful equity, and benefits such as health and dental coverage, flexible vacation, a 401(k) plan, and life insurance. Actual compensation will vary based on role, level, and location. For team members in the EU and UK, we provide locally competitive benefits aligned with regional norms and regulations.
• Annual salary range: $115,000-$155,000 USD, $145,000-$195,000 USD for Senior Engineer candidates