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LangChainLangChainSan Francisco, CA

Software Engineering Manager, Database

Hands-on Engineering Manager to lead a small systems team building SmithDB, LangChain's purpose-built storage and query layer for AI observability at massive scale. Write production Rust, drive architecture and performance, manage the team, and own the technical roadmap.

215k – 260k
On-site7+ YOEEngineering Management

About the role

What you'll do

  • Write and review production Rust code across ingestion, query execution, and storage layers
  • Lead architectural decisions on storage format, compaction, indexing, and query planning
  • Drive performance investigations using memory and CPU profiling tools; own the path from profiling to shipped fix
  • Design and harden the distributed deployment of SmithDB services on Kubernetes (multi-tenant, high-throughput, low-latency)
  • Contribute to cloud object store integrations (S3, GCS, Azure Blob) and set the standard for how SmithDB manages data at rest and in flight
  • Build and maintain observability for the engine itself: metrics, tracing, debug tooling
  • Manage a small but growing team of systems engineers: set goals, run 1:1s, provide technical mentorship, and grow careers
  • Own the SmithDB technical roadmap in partnership with LangSmith product and engineering leadership
  • Communicate progress, risks, and tradeoffs clearly to the broader organization: you write concise, decision-ready updates

What you'll bring

  • 7+ years in systems or database engineering, with at least 2 years in a technical lead or engineering management role
  • Production Rust experience — you can write it, review it, and have opinions on how to structure it at scale
  • Deep understanding of database or storage engine internals: query execution, storage layouts, indexing, compaction
  • Proficiency in systems performance analysis: memory allocators, CPU hotspots, lock contention, async runtimes (Tokio)
  • Experience deploying and operating distributed services on Kubernetes in a production, multi-tenant environment
  • Familiarity with cloud object storage (S3-compatible APIs, consistency models, cost/performance tradeoffs)
  • Proven track record of managing engineers — you can recruit, retain, and level-up a team without losing your technical edge

Nice-to-have

  • Experience building or contributing to columnar storage formats (Parquet, Arrow), OLAP query engines, or time-series stores
  • Background in observability infrastructure or tracing pipelines (OpenTelemetry, ClickHouse, Prometheus)
  • Experience scaling a system from early-stage to hundreds of billions / trillions of records

Compensation

Salary Range: $215,000-$260,000 USD Compensation includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.

Skills

RustKubernetesS3GcsAzure BlobParquetArrowOlapOpenTelemetryClickHousePrometheusTokio
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