FullStack Engineer, AI Observability & Evals Platform (LangSmith)

The role

You will develop and implement key product features for LangSmith, a commercial AI observability and evals platform. You will work across a Go, Python, and Typescript stack while collaborating with product, design, and enterprise customers.

What you will do

• Develop and implement key product features working across our entire Go, Python, and Typescript stack
• Collaborate closely with product and design teams to iterate on new features and enhance the product roadmap
• Drive aggressive project timelines while ensuring high engineering standards are being met by writing clean, maintainable, and well-tested code

Required qualifications

• 2+ years of experience in software engineering working on complex platform products
• Fullstack engineering experience with Go or Python on the backend and React + Typescript on the frontend
• Solid understanding of database systems, particularly Postgres and Redis
• Experience designing and scaling APIs, preferably in high-performance, data-intensive applications
• Strong ownership and a “get stuff done” mindset
• Strong communicator with the ability to collaborate closely with various internal stakeholders and engage directly with our top-tier customers

Nice to have

• Experience with AI/LLM-powered applications
• Experience with developer tools
• Experience with observability platforms

Benefits

• medical, dental, and vision coverage
• flexible vacation
• 401(k) plan
• meals on in-office days in the US

About the company

LangChain builds the foundation for agent engineering, offering open-source tools and a platform for building, evaluating, deploying, and operating agents at scale. The company has 100M+ monthly open source downloads and serves many Fortune 500 companies.