Staff Security Engineer, Application Security

Redwood City, CA

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Posted 1 month ago

Poshmark is looking for a passionate security software expert to drive corporate and product security initiatives. You will identify security gaps and harden Poshmark’s application platforms, cloud infrastructure, and IT systems to protect Poshmark and its 60 million Community members. As we are building Poshmark Security team from the ground up, you will have an opportunity to expand the breadth and/or depth of your security expertise in various security domains and dimensions.


  • As a tech lead, mentor Application Security Engineers in the US and India.
  • Bake security into every stage of the software development lifecycle for Backend/Mobile/Web applications.
  • Identify security gaps and vulnerabilities through SAST, DAST, SCA, threat modeling, penetration testing, code/design review.
  • Mitigate identified vulnerabilities by providing and/or implementing technical solutions.
  • Evaluate and integrate security tools and solutions to improve application security posture.
  • Develop custom tools and automations that enable DevSecOps and SecOps.
  • Lead and manage bug bounty programs.

Desired Skills

  • 10+ years of professional hands-on experience in application security
  • Strong foundation of security architecture, protocols, vulnerabilities, and countermeasures.
  • Strong understanding of secure coding standards and security risks (e.g. OWASP Top 10).
  • Familiarity with cryptography primitives and fundamentals (e.g. SSL/TLS, PKI)
  • Demonstrated experience in programming languages (e.g. JRuby, Java, Kotlin, Swift, and/or JavaScript) and development tools (e.g. Gradle, Jenkins).

Why Poshmark?

Poshmark is a leading social commerce platform for the next generation of retailers and shoppers. Through technology, our mission is to build the world’s most connected shopping experience, while empowering people to build thriving retail businesses. Since launching in 2011, Poshmark has become a vibrant social shopping community with seven million Seller Stylists helping 50 million users discover items they love from over 100 million items. The company is backed by the world’s leading investment firms including Mayfield, Menlo Ventures, GGV Capital, Temasek, Inventus Capital, Uncork Capital, Union Grove Venture Partners, Shea Ventures and AngelList. For more information, please visit, or find us on Instagram, Facebook, Twitter, Pinterest and YouTube.


About us

We’re constantly challenging the status quo and are looking for innovative and passionate people to help shape the future of Poshmark. We’re disrupting the industry by combining social connections with e-commerce through data-driven solutions and the latest technology to optimize our platform. We’re nothing without our amazing team who deliver an unparalleled social shopping experience to the millions of people we connect each day. Come help us build the most connected shopping experience ever.

We built Poshmark around four core values: 1) focus on people to create empowered communities that drive success; 2) together we grow to support each other to strive for our dreams; 3) lead with love to foster genuine connections built upon a foundation of respect; and 4) embrace your weirdness to accept and empower one another on their own unique journey. We’re invested in our team and community, working together to build an entirely new way to shop. That way, when we win, we all win together. Come help us build the most connected shopping experience ever.

Here’s what we’ll set you up with:

  • A team that is invested in transcending journey, career growth and training
  • Competitive salary and equity, based on experience
  • Company sponsors up to 100% cost for your health, dental and vision plans and up to 90% for your dependents
  • Macbook and Smartphone reimbursement
  • Work alongside world-class talent
  • Flexible vacation / paid time off policy
  • Parental leave
  • Healthy and exciting catered  lunches, snacks and beverages offered daily
  • Personal style encouraged (or not, whatever you’re in to)
  • Fun company happy hours, parties, and offsite events

Poshmark is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Job tags: Architecture Cryptography Java JavaScript Penetration testing PKI TLS Vulnerabilities