JavaScript Engineer (Open Source Team)
LangChain · On-site
MeritLog read this listing from LangChain's Ashby job board and last checked it on September 10, 2026.
Source: the employer's Ashby job board. Open the original listing for current details.
Job details
- Work model
- On-site
- Salary
- $160,000 – $240,000 per year
- Location
- San Francisco, CA
- Company website
- docs.langchain.com
Hiring context
How this role compares at LangChain
LangChain has 107 live roles in MeritLog’s catalog across 7 job families, and 47 of them are in engineering. 65 of those listings publish a pay range, a disclosure rate of 61%.
This role's posted range of $160,000 – $240,000 per year sits above 22% of the 63 other LangChain roles quoted over the same currency and period.
LangChain concentrates this hiring in:
Counted across the job boards MeritLog tracks, at the time this page was served. Pay comparisons use only listings that publish a complete range in the same currency and period.
What the role asks for
What you'd do
- Improve the core abstractions and runtime of the LangChain and LangGraph JavaScript packages
- Improve documentation across the LangChain ecosystem
- Answer user questions and resolve issues from the developer community
- Use LangChain to build example applications that demonstrate best practices for developers building AI systems
What they're asking for
- 3+ years of software engineering or applied machine learning experienceExperience
- A background in software engineeringSkill
- Strong written and oral communication skills, with the ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholdersSkill
- The ability to thrive in a fast-moving environment and view unstructured environments as an opportunity to identify the most impactful work and help define the future success of the companySkill
- An ownership-minded approach to work, with the ability to manage your work efficiently and effectively without the need for close supervisionSkill
Parsed by MeritLog from the employer’s own posting. The full description follows below.
Job description
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 Open Source team builds and maintains the core libraries that developers use to build AI agents with LangChain. The team works directly with the open-source community to improve the ecosystem, maintain core packages, and ensure developers can reliably build and deploy production AI systems using LangChain. About the Role We’re looking to add a core maintainer to the LangChain team. This person would be responsible for maintaining and improving the LangChain JavaScript package. In-person in SF preferred. What You'll Do - Improve the core abstractions and runtime of the LangChain and LangGraph JavaScript packages - Improve documentation across the LangChain ecosystem - Answer user questions and resolve issues from the developer community - Use LangChain to build example applications that demonstrate best practices for developers building AI systems What You'll Bring - 3+ years of software engineering or applied machine learning experience - A background in software engineering - 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 the most impactful work and help 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.