Senior 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. 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. But the numbers only hint at the impact. Every idea, every voice, and every contribution moves us closer to a world where credit never stands between people and their financial progress. 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. 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 Information Security team is dedicated to advancing security practices that enhance the safety of our products, customers, and partners. We believe security should empower innovation, move at the speed of the business, and be built in from the ground up. Our mission is to protect Upstart’s products and enterprise while enabling teams to move quickly and safely through strong collaboration, automation, and thoughtful security design. As a Senior Security Engineer at Upstart, you will be responsible for identifying risk, building controls to mitigate risk, and develop solutions to help Upstarters avoid incurring unnecessary risk. You'll use your skills to lead cross functional initiatives, assess business plans and applications, and build software that solves security problems proactively. Position Location - This role is available in the following locations: Remote, San Mateo, Columbus, Austin Time Zone Requirements - This team operates on the East/West Coast time zones. Travel Requirements - This team has regular on-site collaboration sessions. As a digital first company, the majority of your work can be accomplished remotely. The majority of our employees can live and work anywhere in the U.S but are encouraged to to still spend high quality time in-person collaborating via regular onsites. The in-person sessions’ cadence varies depending on the team and role; most teams meet once or twice per quarter for 2-4 consecutive days at a time. How you’ll make an impact: Architect and build software solutions (Workflows, Services, and internal tools) that accelerate security Elevate security maturity across the organization by mentoring engineers, influencing leadership through clear risk metrics, and fostering a culture where security enables innovation Continuously improve systems by learning from real-world signals such as false positives, operational feedback, and evolving threats Serve as a senior technical authority during high-severity incidents, driving root cause analysis and durable architectural improvements What we’re looking for: Minimum requirements: Proven track record of owning security initiatives end-to-end, including post-launch validation, monitoring, and iterative improvement Experience performing security reviews (e.g., design reviews, threat modeling, architecture assessments) and driving actionable outcomes Demonstra ... (truncated, view full listing at source)