Principal Software Engineer, Capital Marketplace

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 The Capital Supply Vertical is the fuel that powers Upstart’s AI based lending operations. Spread across five dynamic high performance teams; Capital Supply is in charge of onboarding and maintaining Capital Supply relations with both our Lending Partners and Investors. We provide both our internal and external business partners with reports, forecasting, financial reporting and help optimize the connection between our customer base and the funding suppliers. As a Principal Engineer at Upstart on the Capital Supply team, you will collaborate with all parts of the Upstart business and engineering, including Machine Learning, Data Engineering, Product Management, Product Design, Platform, Servicing, Lending Partnerships, and Auto. The role will report directly to a head of Capital Market Engineering and work closely with all five of the Capital Supply product engineering teams. Your goal is to autonomously identify and prioritize high impact work that will ultimately make the Capital Supply Vertical successful. How you’ll make an impact: Help define the Capital Supply engineering’s longer term technical roadmap ensuring alignment with business objectives Guide the architectural evolution of Capital Supply systems with an emphasis on systems shared across the Capital Market engineering teams Uncover and drive alignment across complex technical requirements, designs, trade-offs, influencing product direction Proactively evaluate, prototype, and roll out new technologies/frameworks to help cultivate a culture of innovation Partner with product leaders to shape product direction and drive business impact across all Capital Supply products Lead from the front, while mentoring and developing technical leaders Identify and prioritize high leverage and impactful opportunities What we’re looking for: Minimum requirements: Bachelor’s degree in Computer Science, Engineering, or Mathematics, or a related field (or its equivalent) + 8 years of experience Strong technical and software engineering fundamentals including a demonstrated ability to build and own large-scale, highly available consumer products Ability to explain complex business and technical concepts to all audiences Experience leading large cross-team initiatives at companies that have gone through periods of rapid business or organizational growth Track record of successfully mentoring and developin ... (truncated, view full listing at source)