Senior Detection & Response Security Engineer

LangChain, Inc.; San Francisco, Northern (CA, KY); Hybrid; USD 180,000 - 240,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

Flexible vacation

401(k) plan

In-office meals in the US

Job summary

LangChain, Inc. is seeking a hands-on Security Detection Engineer to protect our production platform and cloud infrastructure. You will translate threat models into telemetry, build scalable detections, and drive proactive threat hunting while collaborating with Product Security.

The role requires strong software skills, on-call experience, and a pragmatic mindset to ship durable security solutions across LangChain's services and agents.

Qualifications

• 5+ years in security engineering, with experience in detection engineering, security operations, or incident response.
• Strong software engineering in Python or Go, with TypeScript a plus.
• Experience with GCP or AWS logging, Kubernetes audit and runtime telemetry.
• Ability to model attacker behavior, hunt across complex systems, and distinguish signal from noise.
• Participated in on-call, led incidents, and written postmortems that changed team operations.
• Experience building automation or developer-facing systems and writing production code.
• Pragmatic product mindset: identify users and requirements, prioritize high-leverage problems, and ship iteratively.

Responsibilities

• Own the detection lifecycle: translate threat models, incidents, and attacker behavior into telemetry requirements and detections-as-code.
• Build security monitoring and telemetry: design the telemetry pipeline end-to-end across cloud, Kubernetes, and control plane.
• Engineer investigations and threat hunting: build tools and workflows for proactive hunting and scoping.
• Use agents to scale the team: build internal AI agents to triage alerts and enrich findings.
• Lead incident response and participate in on-call: triage, scope, contain, and drive postmortems.
• Partner with Product Security: turn threat findings into production monitoring and secure design feedback.

Skills

5+ years in security engineering

Strong software engineering

Cloud and Kubernetes detection depth

Detection and adversary expertise

Hands-on incident response

Experience building reliable automatio

Pragmatic product mindset

Job description

LangChain, Inc. is seeking a hands-on Security Detection Engineer to protect our production platform and cloud infrastructure. You will translate threat models into telemetry, build scalable detections, and drive proactive threat hunting while collaborating with Product Security.

The role requires strong software skills, on-call experience, and a pragmatic mindset to ship durable security solutions across LangChain's services and agents.