LangChain
Senior Backend Software Engineer, Observability & Evals Platform (LangSmith)
LangChain, Cambridge, Massachusetts, us, 02140
Senior Backend Software Engineer, Observability & Evals Platform (LangSmith)
LangChain (LangSmith) seeks a Senior Backend to build backend systems powering LangChain's observability and evals platform. This in-person role works 5 days/week in San Francisco, Boston, MA, New York, Amsterdam, or London.
About the role As a Senior Backend Engineer, you will design, develop, and maintain backend services and APIs that support LangSmith’s tracing, monitoring, and evaluation workflows. You will collaborate with full‑stack engineers, product managers, and designers to roll out new features while ensuring systems are performant, reliable, and maintainable.
What you will do
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.
How to be successful in this role
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.
Compensation & Benefits
Competitive base salary and equity; annual range: $170,000–$195,000.
Health and dental coverage, flexible vacation, 401(k) plan, and life insurance.
Benefits aligned with regional norms for EU and UK team members.
#J-18808-Ljbffr
About the role As a Senior Backend Engineer, you will design, develop, and maintain backend services and APIs that support LangSmith’s tracing, monitoring, and evaluation workflows. You will collaborate with full‑stack engineers, product managers, and designers to roll out new features while ensuring systems are performant, reliable, and maintainable.
What you will do
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.
How to be successful in this role
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.
Compensation & Benefits
Competitive base salary and equity; annual range: $170,000–$195,000.
Health and dental coverage, flexible vacation, 401(k) plan, and life insurance.
Benefits aligned with regional norms for EU and UK team members.
#J-18808-Ljbffr