Principal Application Security Engineer
About Upstart
At Upstart, we’re united by a mission that matters: to radically reduce the cost and complexity of borrowing for all Americans. Every day, we bring creativity, experimentation, and advanced AI to reshape access to credit, helping millions move forward financially with clarity and confidence.
Our Platform
As the leading AI lending marketplace, we partner with banks and credit unions to expand access to affordable credit through technology that’s both radically intelligent and deeply human. Our platform runs over one million predictions per borrower using more than 1,800 signals, powering smarter, fairer decisions for millions of customers.
Work Environment
We’re proudly digital-first, giving most Upstarters the flexibility to do their best work from wherever they thrive, alongside teammates across 80+ cities in the US and Canada. Digital-first doesn’t mean distant. We’re intentional about in-person connection through team onsites, planning sessions, and moments that spark creativity and trust. And whether you choose to work primarily from home or collaborate in-person from one of our offices in Columbus, Austin, the Bay Area, or New York City (opening Summer 2026), you’ll have the support to work in the way that works best for you.
Join Our Team
If you’re energized by tackling meaningful problems, excited to innovate with purpose, and motivated by work that truly matters, we’d love to hear from you.
The Team
Upstart’s Application Security team is passionate about bringing progressive approaches to securing our products. We believe that security should empower innovation, move at the speed of business, and have safety by design as core principles. Our team’s mission is to ensure the safety of our core product platforms, enterprise, and manage threats to Upstart. We approach our efforts through automation, strong collaboration with our partner teams, and maintaining a positive experience for Upstarters.
Job Description
As the Principal Application Security Engineer at Upstart, you will be expected to lead cross-functional and cross-organizational discussions and outcomes around threat modeling, application and infrastructure security. You will be expected to deeply understand the business verticals and product needs and influence them to build highly secure systems and platforms. You will have a direct hand in shaping the security posture of our products and platforms.