LangChain · 1 month ago
Senior Backend Software Engineer, Observability & Evals Platform (LangSmith)
San Francisco, CA
Full-time
Onsite
Senior Level
$170K/yr - $195K/yr
5+ years expLangChain is on a mission to make intelligent agents ubiquitous, providing an agent engineering platform and open source frameworks for developers. The Senior Backend Engineer will build backend systems for LangSmith’s observability and evals platform, focusing on services that enable developers to monitor and evaluate AI applications at scale.
Agentic AIArtificial Intelligence (AI)DatabaseDeveloper APIsGenerative AI
Responsibilities
Design, develop, and maintain backend services and APIs to support LangSmith’s tracing, monitoring, and evaluation workflows
Collaborate on architectural decisions to ensure systems are performant and maintainable
Optimize storage and query performance for high-volume observability and evaluation data
Ensure system reliability through strong testing, monitoring, and alerting practices
Troubleshoot and resolve production issues, performing root-cause analysis and implementing long-term fixes
Create and maintain technical documentation, including system design and API references
Work closely with full-stack engineers, product managers, and product designers on rolling out new features
Qualification
Required
5+ years of professional experience in backend engineering
Proficiency in one or more backend languages/frameworks, ideally Python or Go
Strong understanding of API design and building reliable data services
Experience with high-throughput or mission-critical systems
Demonstrated ability to optimize backend services for performance and reliability
Experience with database systems (Postgres, Redis, Clickhouse), and cloud platforms (AWS, GCP, Azure)
Strong communication skills, with the ability to collaborate cross-functionally
Customer centricity and ownership mentality
Benefits
Health and dental coverage
Flexible vacation
A 401(k) plan
Life insurance
Company
LangChain
LangChain is a platform that provides open-source frameworks and tools for engineering and deploying language model agents.
51-200 employees
H1B Sponsorship
LangChain has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (6)
Funding
Current Stage
Growth StageTotal Funding
$160MKey Investors
IVPSequoia CapitalBenchmark
2025-10-20Series B· $125M
2024-02-15Series A· $25M
2023-03-21Seed· $10M
Leadership Team
Harrison Chase
Co-Founder and CEO
Ankush Gola
Co-Founder
Recent News
2025-12-11
2025-12-05
Company data provided by crunchbase