Senior Backend Engineer, LangSmith Deployments

LangChain; New York (NY); On-site; USD 175,000 - 240,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

Flexible vacation

401(k) plan

Meals on in-office days

Job summary

LangChain in New York is seeking a backend engineer to build infrastructure for AI agents. The role involves designing distributed systems, owning core data infrastructure, and scalable architectural decisions.

The ideal candidate has 4+ years of experience, strong skills in Go/Python, and familiarity with distributed systems and Kubernetes. Competitive compensation includes a salary range of $175,000 to $240,000 USD.

Qualifications

• 4+ years of professional backend engineering experience.
• Strong proficiency in Go and/or Python.
• Experience with distributed systems including consensus mechanisms and queueing.

Responsibilities

• Design distributed queue and worker systems for concurrent agent execution.
• Own core data infrastructure and state persistence.
• Collaborate on architectural decisions for scalability and robustness.

Skills

Back-end engineering

Go

Python

Distributed systems

Kubernetes

Strong communication skills

Job description

About the Team

The Deployment team builds the platform that runs AI agents in production. We design and scale the core durable execution runtime to power reliable long‑running agents with resumable streaming and inter‑agent protocol support. We work closely with open source and other product teams to make it easy to bring any agent from prototype to production.

About the Role

We're building purpose‑built infrastructure for running AI agents. Unlike traditional web apps, agents run for long durations, collaborate asynchronously with humans and other agents, and need to survive failures mid‑execution. LangSmith Deployments is the runtime that makes this work, with durable checkpointing, fault‑tolerant orchestration, and horizontal scaling, deployed across cloud and self‑hosted environments.

What You’ll Do

• Design distributed queue and worker systems that handle concurrent agent execution, background tasks, and multi‑agent coordination across horizontally scalable infrastructure
• Own core data infrastructure — state persistence, atomic job claiming, connection management, and schema evolution
• Collaborate on architectural decisions, ensuring solutions are scalable and robust.
• Ship resumable streaming infrastructure so clients can disconnect and reconnect mid‑execution without losing state
• Instrument and monitor production systems — tracing, metrics, and alerting to keep the platform healthy
• Participate in on‑call rotations and own incident response for the runtime
• Create and maintain technical documentation, including system design and operational runbooks.
• Contribute to and extend open‑source LangGraph, which is used by thousands of developers to build agent applications

What You’ll Bring

• 4+ years of professional backend engineering experience
• Strong proficiency in Go and/or python
• Experience with distributed systems — conensus mechanisms, queueing, state machines, and/or workflow orchestration
• Experience with scaling and sharding databases in high throughput environments
• Familiarity with Kubernetes, infrastructure‑as‑code, and at least one major cloud platform
• Strong communication skills and ability to work cross‑functionally on a small team
• Annual salary range: $175,000-$240,00 USD

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.