Senior Backend Engineer: AI Observability & Evals Platform

Fdetimes; Boston (MA); On-site; USD 170,000 - 235,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision coverage

401(k) plan

In-office meals

Job summary

LangChain is hiring a Senior Backend Engineer to join our Boston-based team. You will build backend systems powering LangSmith and LangChain’s observability and evaluation platform, focusing on scalable APIs and reliable services.

You will work with full-stack engineers, product managers, and designers to roll out features, optimize performance, and improve production reliability in a fast-growing AI tooling company.

Qualifications

• 4+ years of backend engineering experience.
• Proficiency in Python and/or Go.
• Strong API design and data services.
• Experience with high-throughput, mission-critical systems.

Responsibilities

• Design, develop, and maintain backend services and APIs for tracing, monitoring, and evaluation workflows.
• Collaborate on architectural decisions to keep systems performant and maintainable.
• Optimize storage and query performance for large-scale observability data.
• Ensure reliability with thorough testing, monitoring, and alerting practices.
• Troubleshoot production issues with root-cause analysis and long-term fixes.
• Create and maintain API references and system design documentation.

Skills

Backend engineering

Python

Go

API design

High-throughput systems

Communication

Tools

PostgreSQL

Redis

ClickHouse

AWS

GCP

Azure

Job description

LangChain is hiring a Senior Backend Engineer to join our Boston-based team. You will build backend systems powering LangSmith and LangChain’s observability and evaluation platform, focusing on scalable APIs and reliable services.

You will work with full-stack engineers, product managers, and designers to roll out features, optimize performance, and improve production reliability in a fast-growing AI tooling company.