LangChain
Senior Backend Software Engineer, AI Observability & Evals Platform (SF)
$180K–$240K
San Francisco, CA +2 · On-site · Senior · Full-time · Posted Jan 8, 2026
- Location
- San Francisco, CA
Boston, MA
New York, NY - Experience
- 5+ years of professional experience in backend engineering working on highly complex products.
About the job
Builds backend systems for LangSmith’s AI observability and evaluation platform, enabling developers to monitor and evaluate AI applications at scale.
What you'll do
- Design, develop, and maintain backend services and APIs for tracing, monitoring, and evaluation workflows.
- Optimize storage and query performance for high-volume observability and evaluation data; support system reliability through testing, monitoring, and alerting.
- Troubleshoot production issues, perform root-cause analysis, and implement long-term fixes.
What they ask for
- Proficiency in one or more backend languages or frameworks.
- Strong understanding of API design and reliable data services.
- Experience with high-throughput or mission-critical systems and optimizing backend performance and reliability.
- Experience with database systems and cloud platforms.
Pay
$180,000- $240,000 (annual salary range; base salary or total pay not specified)
Tools
Python, Go, Postgres, Redis, Clickhouse, AWS, GCP, Azure
AI focus
Develops backend systems for AI application observability, monitoring, and evaluation.
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