Senior Software Engineer, Security

Persona
San Francisco, CA

About Persona

Persona is the configurable identity platform built for businesses in a digital-first world. Verifying individuals and organizations is harder — but more important — than ever, with AI enabling fraudsters to launch sophisticated accounts at scale and regulations evolving rapidly.

We’ve built Persona to support practically every use case and industry — that’s why we’re able to serve a wide range of leading companies. For example, Instacart relies on Persona to verify shoppers who onboard onto their platform before delivering groceries to your doorstep. Meanwhile, OpenAI relies on Persona to keep bad actors out, protecting one of the world’s most powerful AI platforms from large-scale abuse in a time when AI is reshaping the way we work and live.

We believe that making the internet safer and more human requires a team that reflects the diverse, global nature of the people we aim to serve . We’re growing rapidly and looking for exceptional people to join us.

About the Role

The Persona Security Team is looking for a software engineer to join us. You’ll own security sensitive libraries and components of our production platform. You'll play a pivotal role in fortifying our defenses against evolving threats. Your mission: design, build and maintain security libraries and systems to protect our customers’ accounts and data in our platform. You'll have the opportunity to employ cutting-edge technologies, innovative strategies, and your expertise to thwart potential attacks before they disrupt our operations. This position is based at our headquarters in San Francisco. We offer relocation assistance for those based outside of San Francisco Bay Area.

What you'll do at Persona

  • Own the systems used to encrypt our customers’ data.

  • Refine the authentication and authorization components in our product, used by our customers to access their accounts every day.

  • Design, build, and maintain flexible and reusable security libraries for other engineering teams at Persona to use.

  • Propose, build, and ship new security features in our product.

  • Participate in the on-call rotation for the Security Team.

What you'll bring to Persona

  • Experience - 5+ years of security software engineering experience at a fast-moving technology company, including experience with building performant, highly interactive web applications.

  • Passion for security - You should be excited about keeping your skills and knowledge sharp, and sharing that with your peers and the rest of the company.

  • Product-thinker - You build products in a way that maximizes product value while minimizing complexity. You understand and can resolve tensions between product requirements and engineering design for large-scale projects.

  • Innovative mindset - You go beyond implementing what is asked and make product suggestions and features that help push our product forward. You are naturally curious and embrace change.

  • Proactive thinking - You learn from your mistakes quickly, and know how to unblock yourself when needed. We’re looking for someone that can tell us how to solve our problems, instead of waiting to be told how to solve problems.

  • Collaborative spirit - Collaboration isn’t just a buzzword for you, it’s your secret to success. You leverage the diverse perspectives of your teammates and sometimes go out of your way to learn other functions to get the job done.

Full-time Employee Benefits and Perks

For full-time employees (excluding internship and contractor opportunities), Persona offers a wide range of benefits, including medical, dental, and vision, 3% 401(k) contribution, unlimited PTO, quarterly mental health days, family planning benefits, professional development stipend, wellness benefits, among others. While we believe competitive compensation and benefits are a critical aspect of you deciding to join us, we do hope you consider why our core values and culture are right for you. If you’d like to better understand what it’s like working at Persona, feel free to check out our reviews on Glassdoor .

Diversity, equity, inclusion and belonging

At Persona, we strive to put diversity and inclusion at the forefront of everything we do, reflecting our core values. Our DEIB Employee Resource Group seeks to build a diverse and inclusive team that fosters an environment where each Personerd feels empowered to bring their unique differences to work and achieve their full innovative potential. Our hope is that by fostering such an environment, we strengthen our business and relationships by putting people first.

We strive to promote a culture that celebrates diversity and inclusiveness regardless of, but not limited to, race, gender, sexual orientation, family status, religion, ethnicity, national origin, physical disability, veteran status, or age.

Posted 2025-12-04

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