# Senior Security Engineer

**Company:** [LangChain](https://hotfix.jobs/companies/langchain)
**Location:** San Francisco, CA, New York, NY
**Role:** Security Engineering
**Salary:** $180k – $240k/yr
**Experience:** 5+ years
**Skills:** Python, Go, TypeScript, GCP, AWS, Kubernetes, Kubernetes Audit Telemetry, Threat Hunting, Incident Response, AI Agents, Terraform, Helm, SOC 2, ISO 27001
**Posted:** 2026-08-17

> Build detection, investigation, and incident-response systems protecting LangChain’s production platform, cloud infrastructure, and agentic workloads. The role requires 5+ years of security engineering experience, strong Python or Go skills, cloud and Kubernetes detection expertise, and hands-on incident response experience.

## Job Description

## Responsibilities
- Own the detection lifecycle by translating threat models, incidents, and attacker behavior into telemetry requirements and detections-as-code.
- Validate detection coverage, measure signal quality, tune false positives, and continuously test defenses.
- Design end-to-end security telemetry pipelines across GCP, AWS, Kubernetes, and the LangSmith/LangGraph control plane.
- Instrument services and define reliable, useful security signals.
- Build investigation and threat-hunting tools and workflows for proactive hunting, evidence collection, incident scoping, and containment.
- Turn investigation findings into detections and lasting improvements.
- Build reliable internal AI agents and automation to triage alerts, enrich findings, gather evidence, scope incidents, and accelerate security work.
- Design human-in-the-loop controls and evaluations for safe, observable, trustworthy automation.
- Triage, scope, contain, and remediate security incidents; participate in an incident on-call rotation.
- Lead postmortems that produce durable engineering changes.
- Partner with Product Security to turn threat models and vulnerability findings into production monitoring.

## Requirements
- 5+ years of security engineering experience, including meaningful detection engineering, security operations, or incident response experience.
- Strong software engineering skills in Python or Go; TypeScript is a plus.
- Experience with GCP or AWS logging, Kubernetes audit and runtime telemetry, workload identity, and actionable detections.
- Ability to model attacker behavior, conduct threat hunting, test detection coverage, and distinguish meaningful signals from noise.
- Hands-on incident response experience, including on-call participation, incident leadership, and postmortems.
- Experience building reliable automation or developer-facing systems, including APIs, workflows, instrumentation, quality evaluation, and production operations.
- Pragmatic product mindset with the ability to identify users and requirements, prioritize high-leverage problems, define success, and ship iteratively.

## Nice-to-haves
- Experience building or operating AI agents for security workflows such as alert triage, investigation, evidence collection, or human-in-the-loop response.
- Proficiency using AI tooling to accelerate security investigations and engineering work.
- Understanding of AI threats, adversarial testing, and security boundaries of LLM and agent workloads.
- Exposure to SOC 2 or ISO 27001 monitoring and evidence automation.
- Experience with infrastructure as code such as Terraform or Helm.
- Experience securing SaaS and self-hosted or air-gapped deployments.

## Compensation and Benefits
- Annual salary range: $180,000-$240,000 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, and meals on in-office days in the US.

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