Poshmark

Staff Engineer, Infrastructure Security

Poshmark2 months ago
Location

Redwood City, California, USA

Type

Full Time

Salary

USD 155,900 – 261,100

Level

Staff

Role

Staff Engineer, Infrastructure Security

Posted

Dec 22, 2025

Full TimeStaff

The role

Summary

A Staff-level Infrastructure Security Engineer role at Poshmark, focusing on designing and implementing robust cloud security strategies for AWS infrastructure. The ideal candidate will secure the company's cloud platform, develop advanced security architectures, and drive proactive security practices across the organization's IT ecosystem.

What you'll do

Cloud Security Architecture: Design, implement, and maintain secure AWS cloud architecture aligned with industry standards and CIS benchmarks.
Vulnerability Management: Continuously assess and manage vulnerabilities across cloud, infrastructure, and endpoint systems through comprehensive security reviews and risk assessments.
Security Policy Development: Create and maintain cloud and infrastructure security reference architectures, policies, and best practices.
Identity and Access Management: Architect and enforce cloud and enterprise IAM controls with Okta and AWS IAM, emphasizing least privilege, SSO, and federation.
Threat Detection and Mitigation: Develop bot and fraud attack detection strategies, and participate in incident response activities across AWS and corporate environments.
Cross-Functional Collaboration: Partner with Engineering, DevOps, SRE, IT, and Compliance teams to embed security requirements throughout the infrastructure lifecycle.

What we look for

Technical

Cloud Security8+ years of professional experience in Security Engineering, with 5+ years focused on AWS Cloud Security
AWS Security ServicesHands-on experience with AWS security services including IAM, WAF, Advanced Shield, GuardDuty, CloudTrail, Macie, Config, Organizations, and Network Firewall
Security FrameworksFamiliarity with security frameworks and standards (CIS, NIST, ISO 27001, OWASP)

Education

Cybersecurity EducationBachelor's degree in Computer Science, Information Security, or related technical field preferred

Experience

Enterprise Security TechnologiesDemonstrated experience with Enterprise Security technologies (Okta, CrowdStrike, JAMF, SSO)
Security AutomationExperience in building and deploying security controls as code using Terraform, Python, or similar automation frameworks

Skills

Required skills

AWS Cloud SecurityDeep understanding of AWS security services and cloud infrastructure security
Infrastructure HardeningExpertise in system hardening, least privilege principles, and zero-trust security models
Security AutomationAbility to implement security controls and detection mechanisms using infrastructure-as-code

Nice to have

Security CertificationsAWS Certified Security – Specialty, Certified Cloud Security Professional (CCSP)
Incident ResponseAdvanced experience in threat detection, investigation, and response strategies

Compensation & benefits

Salary

USD 155,900 – 261,100 (annual)

Stock options

Available

Benefits

Health Insurance

Comprehensive medical, dental, and vision coverage

Retirement Planning

401(k) with company matching

Professional Development

Budget for security conferences, training, and certification programs

Stock Options

Equity compensation for eligible employees

Flexible Work Arrangements

Potential hybrid or remote work options

Interview process

  1. 1
    Initial Screening — Phone or video call with recruiting team to assess background and initial fit
  2. 2
    Technical Phone Interview — Deep dive into cloud security expertise, AWS security services, and infrastructure security experience
  3. 3
    Architectural Design Challenge — Present a cloud security architecture solution demonstrating problem-solving and design skills
  4. 4
    Onsite/Virtual Panel Interviews — Multiple interviews with security team members, engineering leaders, and cross-functional stakeholders
  5. 5
    Final Executive Interview — Conversation with senior leadership to assess cultural fit and strategic alignment
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Poshmark

Poshmark

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Poshmark is an American social commerce platform for buying and selling fashion. It enables users to create virtual closets and host live shopping events.

Redwood City, California, United StatesFounded 2011poshmark.com

Tech Stack

Languages
Python
Frameworks
Zero Trust
Tools
TerraformOktaCrowdStrike
Other
AWS Security Services

Interview Guides

14 guides available for Poshmark

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