About the Lang Chain:

At Lang Chain, 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, Lang Chain and Lang Graph, see over 90+ million downloads per month and help developers build agents with speed and granular control. Lang Smith offers observability, evaluation, and deployment for rapid iteration, enabling teams to transform LLM systems into dependable production experiences.

Lang Chain 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:

We’re looking for an Engineering Manager to lead the team building Lang Smith, our observability and evaluation platform for LLM applications. You’ll define the technical direction, grow and mentor a world-class engineering team, and partner with product and design to deliver features that help developers build and deploy trustworthy AI systems with confidence.

What you will do:

• Build, mentor, and grow a high-performing team of engineers, fostering collaboration, ownership, and accountability
• Strengthen Lang Chain’s engineering culture through mentorship, high-quality code, and technical excellence
• Shape long-term technical direction and ensure scalability and reliability of Lang Smith AI Observability Platform
• Partner with product and design teams to define scope, sequence, and success criteria for key initiatives
• Maintain a high bar for technical excellence while making sure the team moves with urgency and focus
• Lead by example in writing clean, maintainable, and well-tested code in Go/Python and Typescript
• Engage directly with customers to understand their needs and translate them into actionable product improvements

How to be successful in this role:

• Experience managing or tech-leading teams delivering complex full-stack products
• Strong technical background in Go/Python and React/Typescript
• Solid understanding of databases (Postgres, Redis and Click House)
• Proven ability to design high throughput data-intensive systems
• Bias towards shipping quickly and learning from customers
• Strong communication skills—able to collaborate with internal stakeholders and engage directly with customers
• Bonus: Experience building AI/LLM-powered applications, developer tools, or observability platforms

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: $200,000- $250,000