Python OSS Engineer
LangChain · Cambridge, MA
- On site
- Full-time
- $200,000 / year
- Cambridge, MA
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Subject: Interested in the Python OSS Engineer role at LangChain
Hi Alex — I came across the Python OSS Engineer opening and wanted to reach out directly. I've spent the last few years doing exactly this kind of work, and LangChain stood out because…
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Job highlights
- Maintain and evolve core LangChain Python ecosystem.
- Build reliable abstractions for AI agents.
- Work closely with open-source community.
- Define developer experience for AI applications.
- Improve core abstractions, documentation, and resolve issues.
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 Python Open Source team maintains and evolves the core LangChain Python ecosystem used by millions of developers worldwide. We focus on building reliable, well-designed abstractions for developing AI agents and integrating them with real-world tools and systems. The team works closely with the open-source community, incorporating feedback and contributions while ensuring the core libraries remain stable, scalable, and production-ready. Our work defines the developer experience for building AI applications with Python.
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
What You'll Do
- Improve the core abstractions and runtime of the LangChain and LangGraph packages
- Improve documentation across the LangChain ecosystem
- Answer user questions and resolve issues from the community
- Use LangChain to build example applications that demonstrate how to build production AI systems
What You'll Bring
- 5+ years of software engineering or applied machine learning experience
- Strong written and oral communication skills, with the ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholders
- The ability to thrive in a fast-moving environment and view unstructured environments as an opportunity to identify impactful work and define the future success of the company
- An ownership-minded approach to work, with the ability to manage your work efficiently and effectively without the need for close supervision
Compensation
Annual salary range: $160,000- $240,000
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.
Key skills/competency
- Python
- Open Source Software
- Software Engineering
- AI Agents
- Machine Learning
- LangChain
- LangGraph
- Developer Experience
- Community Engagement
- Documentation
Skills & topics
- Python
- Open Source
- Software Engineer
- AI
- Machine Learning
- LangChain
- LangGraph
- Developer
- Agent Engineering
- Core Maintainer
How to get hired
- Tailor your resume: Highlight Python, open-source contributions, and AI agent development experience.
- Showcase your portfolio: Link to GitHub projects demonstrating LangChain/LangGraph usage and community involvement.
- Prepare for technical questions: Brush up on Python, core AI concepts, and LangChain specifics.
- Demonstrate communication skills: Practice explaining complex technical ideas clearly and concisely.
- Express ownership mindset: Show initiative in identifying and solving problems in past roles.
Technical preparation
Behavioral questions
Frequently asked questions
- What are the key responsibilities for a Python OSS Engineer at LangChain?
- The Python OSS Engineer at LangChain is responsible for maintaining and improving the core LangChain Python package, enhancing its abstractions and runtime, improving documentation, answering community questions, and building example applications.
- What experience is required for the Python OSS Engineer role at LangChain?
- The role requires 5+ years of software engineering or applied machine learning experience, strong communication skills, the ability to thrive in a fast-moving environment, and an ownership-minded approach.
- What is the work arrangement for this Python OSS Engineer position?
- This is an in-person role, requiring 5 days per week in the office, preferably in San Francisco, CA, or Boston, MA.
- What is the salary range for the Python OSS Engineer role at LangChain?
- The annual salary range for this position is $160,000 to $240,000.
- What kind of impact can I have as a Python OSS Engineer at LangChain?
- As a core maintainer, you'll directly shape the LangChain Python ecosystem, used by millions globally, influencing the developer experience for building AI applications.
- What are the benefits offered to employees at LangChain?
- LangChain offers comprehensive benefits including medical, dental, and vision coverage, flexible vacation, a 401(k) plan, and meals on in-office days in the US.
- How does LangChain support its open-source community?
- The Python Open Source team actively works with the community, incorporating feedback and contributions to ensure the core libraries remain stable and production-ready.
- What are the main open-source projects maintained by LangChain?
- LangChain maintains core open-source frameworks including LangChain, LangGraph, and Deep Agents.
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