Senior Backend Engineer - AI Observability & Evals Platform
langchainSomerville (MA)
Senior Backend Engineer - AI Observability & Evals Platform
Posted 2 days ago
langchainSomerville (MA)
SENIORITY
Senior
About the role
LangChain is seeking a Senior Backend Engineer to join our Boston-based team. You will build the backend systems powering LangSmith, focusing on observability, evaluation, and scalable data services.
The role emphasizes backend feature development with opportunities to engage in frontend and full-stack considerations as needed. Ideal candidates have 4+ years in backend engineering, strong Python/Go API design skills, and experience with high-throughput systems and cloud platforms.
Before you apply
Applying takes about a minute. These four things decide how fast it moves after that.
Your profile is current
It's what we read first. Occupations, seniority and locations matter more than a long history.
Two examples you can talk through
Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.
A number in mind
What you're on now and what would make you move. We negotiate better when we know both.
Your notice period
Employers plan around it, and it's the question that stalls offers most often.
Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.