Senior Software Engineer - Partner Integrations and Origination Platform
AI summary of the role
Senior Software Engineer on the Partner Integrations and Origination Platform team, designing and building scalable backend systems that power loan originations across multiple products and lending partners.
No longer in the current catalog. Last included 2026-09-09. Check the employer’s posting for availability.
What you’ll do
- Design and build scalable backend services and platform capabilities supporting origination workflows across multiple products and lending partners
- Improve reliability, observability, and operational resilience of critical origination systems and APIs
- Refactor and decouple legacy systems to create reusable, product-agnostic platform infrastructure
- Build orchestration and workflow solutions that streamline partner onboarding and reduce manual operational work
What you’ll bring
- 6+ years building and operating backend services, APIs, or data-intensive systems in production
- Proficiency with at least one modern backend framework; experience with Ruby on Rails or ability to ramp quickly in Ruby
- Experience designing distributed systems, service integrations, or workflow-based architectures
- Experience owning software through full development lifecycle including design, implementation, deployment, monitoring, and on-call support
Technologies
Ruby on Rails · Temporal · APIs · distributed systems · workflow engines · orchestration platforms · backend services · observability
About Upstart
AI lending marketplace connecting consumers with bank and credit union partners across personal, auto, home-equity, and revolving-credit products.
Public · 1000–2000 people
Source and classification
Internal deployment & tooling · Evidence for this classification:
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 Partner Integrations and Origination Platform team builds and scales the systems that power loan originations across products and lending partners. The team focuses on improving reliability, observability, and scalability across origination workflows while enabling new funding sources and supporting Upstart’s broader platform evolution. As a Senior Software Engineer (L5) at Upstart, you will
More from the job description
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 3,000 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 [... source excerpt omitted ...] dically 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 moment [... source excerpt omitted ...] nd scalability across origination workflows while enabling new funding sources and supporting Upstart’s broader platform evolution. As a Senior Software Engineer (L5) at Upstart, you will design and build scalable backend systems that simplify and standardize origination flows across products and partner types. You’ll help modernize foundational infrastructure, reduce operational complexity, and create extensible platform capabilities that allow teams to onboard new partners and launch new lending experiences more efficiently. How you’ll make an impact Design and build scalable backend services and platform capabilities that support origination workflows across multiple produc
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