Langchain Platform Software Engineer, Ingestion at Langchain owns ingestion, query systems, and API/SDK/CLI surfaces for LangSmith platform. The role involves building scalable data-intensive systems and maintaining integrations with AI frameworks.
Responsibilities
This role sits at the core of LangSmith. You'll own the ingestion systems, query systems, and the API, SDK, and CLI surfaces that thousands of development teams use every day. You will work at the intersection of distributed systems and developer experience on infrastructure that our customers across the industry depend on.
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
Solve complex problems: debug performance bottlenecks, optimize database queries, and architect solutions for distributed-system challenges
Respond to incidents: participate in an on-call rotation focused on post-incident learning, automation, and prevention
How to be successful in this role:
Many of these will apply to you — we don't expect every box checked.
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)
Backend languages: Strong backend software engineering skills with production-level experience in Go, Python, or TypeScript.
Qualification
Strong experience with JavaKnowledge of columnar fileBackground in high-growth startupsLocation
Preferred
Experience building and operating production systems, developer-facing APIs, or both
Strong experience with Java
Knowledge of columnar file, memory formats and OLAP databases
Background in high-growth startups
Location: This role can be based in NYC or San Francisco
