Senior Backend Engineer, LangSmith Deployments

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