# Senior Backend Engineer, LangSmith Deployments

**Company:** [LangChain](https://hotfix.jobs/companies/langchain)
**Location:** San Francisco, CA, New York, NY
**Role:** Backend Engineering
**Salary:** $175k – $225k/yr
**Experience:** 4+ years
**Skills:** Go, Python, Kubernetes, Terraform, Distributed Systems, Databases, Cloud Platforms, Workflow Orchestration, State Machines, Infrastructure As Code
**Posted:** 2026-02-25

> Senior Backend Engineer builds scalable infrastructure for AI agent deployments, focusing on distributed queues, state persistence, fault-tolerant orchestration, and monitoring. Requires 4+ years experience with Go/Python, Kubernetes, and distributed systems.

## Job Description

## Responsibilities
- 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

## Requirements
- 4+ years of professional backend engineering experience
- Strong proficiency in **Go** and/or **Python**
- Experience with distributed systems — consensus 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

## Compensation & Benefits
- Annual salary range: **$175,000-$225,000 USD**
- Competitive compensation including base salary, meaningful equity, health/dental coverage, flexible vacation, 401(k), life insurance

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