# Senior Security Engineer, Detection & Response at Flexport

- Company: Flexport
- What the company does: Ship smarter with Flexport. Backed by SoftBank VF, Y Combinator and a16z.
- Company website: https://www.flexport.com/
- Type: Startups
- Level: Senior
- Location: San Francisco, California, United States
- Work setup: On-site
- Posted: 2026-08-27
- Apply by: 2026-10-11
- Apply: https://job-boards.greenhouse.io/flexport/jobs/8160833
- Page: https://www.1752.vc/careers/jobs/flexport-senior-security-engineer-detection-and-response/

## About the role

There is no MSSP and no tier-1 queue here. Detection & Response engineers own their detections end to end: you write them, you tune them, and your team is paged when they fire. The security team is spread across the globe with a follow-the-sun pager rotation so nobody is paged at 3am local. The adversaries are real. The business is growing fast and the threat surface is growing with it. Defining the necessary telemetry is part of the job.

## What they're looking for

- Build and tune detections across endpoint, identity, SaaS, and cloud , treating them as software: version-controlled, peer-reviewed, and shipped through the same CI/CD practices the rest of engineering uses
- Track detection quality as measured quantities : coverage against MITRE ATT&CK, precision, time-to-detect. We don’t build-and-forget here
- Own incident response: triage, contain, remediate, and write the retrospective that turns the incident into a systemic fix
- Build automation that removes toil from investigations, and partner closely with the US-based team so context carries across time zones instead of getting lost at handoff
- Define telemetry requirements for new systems before they ship , working with infrastructure and product teams to close visibility gaps rather than discovering them during an incident
- Threat hunt proactively across the estate , converting hypotheses into either new detections or documented coverage

Tags: Engineering