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ashby

Platform Security Engineer

Outset
San Francisco, USA
Full-time
Mid
Remote
USD 210000-300000 / year
Discovered 1 weeks ago
awsterraform

Full Job Posting

Responsibilities

  • Identify, assess, and help remediate security risks across our AWS infrastructure, Terraform code, application architecture, and product code.
  • Partner with engineering teams to design secure systems and incorporate security into normal development and operational workflows.
  • Participate in security reviews of RFC and PRR documentation, providing clear, actionable feedback on architecture, data flows, access controls, abuse cases, and technical risk.
  • Review application and infrastructure changes where additional security scrutiny is warranted.
  • Participate in external penetration tests, including preparation, technical coordination, analysis of findings, remediation planning, and validation of fixes.
  • Help improve the effectiveness and repeatability of the penetration-testing program, with the opportunity to assume ownership of the program over time.
  • Serve as the lead platform investigator during security and privacy incidents, working within the incident-response process led by the Head of Security.
  • Analyze application, cloud, identity, network, audit, and infrastructure telemetry to determine the scope, impact, and root cause of incidents.
  • Translate investigation findings into containment actions, durable remediations, improved detections, and clear technical documentation.
  • Contribute to the design, implementation, tuning, and maintenance of SIEM detection rules that monitor our platform.
  • Investigate and respond to alerts involving AWS infrastructure, application behavior, access patterns, data movement, and other platform activity.
  • Improve logging and telemetry where existing data is insufficient to detect threats or investigate incidents.
  • Develop security tooling and automation that help engineers identify and address vulnerabilities earlier.
  • Partner with SRE and engineering teams on cloud configuration, identity and access management, secrets management, vulnerability management, and infrastructure hardening.
  • Help establish practical security standards that reduce risk without unnecessarily slowing product development.

Qualifications

  • Hands-on experience in application security, cloud security, infrastructure security, or security-focused site reliability engineering.
  • Experience securing production systems in AWS, including familiarity with identity, networking, logging, data protection, and common cloud attack paths.
  • Strong working knowledge of Terraform and infrastructure-as-code security practices.
  • The ability to assess security across both infrastructure and application layers rather than treating them as separate environments.
  • Experience reviewing application architecture or source code for security vulnerabilities and design weaknesses.
  • Familiarity with common application, API, authentication, authorization, and data-security risks.
  • Experience investigating complex technical events using application logs, cloud telemetry, audit trails, and other security data.
  • Experience writing, tuning, or responding to SIEM detection rules.
  • The ability to distinguish meaningful security signals from expected production behavior and noisy telemetry.
  • Experience evaluating penetration-test findings, determining their practical risk, and partnering with engineers on remediation.
  • Strong scripting or software-development skills for building security tools, automations, and integrations.
  • Demonstrated proficiency with agentic software development.
  • Sound judgment when balancing security risk, operational reliability, engineering effort, and product priorities.
  • Clear written and verbal communication, including the ability to explain technical risks and recommended actions to both engineering and non-engineering stakeholders.
  • A collaborative approach that helps engineering teams build safer systems and make informed security decisions.
  • Bonus
  • Partnership with IT Security in building and supporting each security domain
  • Technical project management experience; ability to build a plan, clarify priorities, and both lead a team of collaborators and yourself to execute with urgency.
  • Experience serving on a security or privacy incident-response team.
  • Experience leading technical investigations during security or privacy incidents.
  • SANS FOR509 training or certification.
  • Purple teaming experience, including using offensive findings to improve defensive coverage.
  • Experience owning or coordinating an external penetration-testing program.
  • Experience with threat modeling, detection engineering, cloud forensics, or security automation.

Preferred Qualifications

  • Bonus

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