Software Engineer - LangSmith Ingestion and API

Responsibilities:

• Build and scale critical systems: design and operate high-throughput, data-intensive ingestion and trace-query systems supporting LangSmith, built on SmithDB, our purpose-built database for agent observability. Build monitoring, alerting, and automated recovery so the pipeline stays resilient.
• Set API, SDK, and CLI standards: define and enforce the standards, tooling, and CI that power SDK generation across Python, TypeScript, Go, and Java; keep our developer surfaces consistent, high-quality, and self-served across feature teams.
• Own integrations: build new integrations and maintain existing ones so it's easy to use LangSmith with any AI framework, agent, or tool — keeping us framework-agnostic.

Qualifications:

• Platform engineering: hands-on experience designing and running data-intensive systems at scale.
• Developer experience: a track record of building high-quality, widely-adopted CLIs, SDKs, or API standards that developers actually enjoy using.
• Database expertise: production experience with OSS datastores (PostgreSQL, Redis).

Compensation & Benefits:

• We offer competitive compensation that includes base salary, meaningful equity, and benefits such as health and dental coverage, flexible vacation, a 401(k) plan, and life insurance.
• Actual compensation will vary based on role, level, and location.
• For team members in the EU and UK, we provide locally competitive benefits aligned with regional norms.