Senior Software Engineer, Core GenAI Platform

Upstart is the leading AI lending marketplace partnering with banks and credit unions to expand access to affordable credit. By leveraging Upstart's AI marketplace, Upstart-powered banks and credit unions can have higher approval rates and lower loss rates across races, ages, and genders, while simultaneously delivering the exceptional digital-first lending experience their customers demand.

As a Senior Software Engineer on Upstart's Core GenAI Platform team, you will help design and build a unified interface for securely interacting with large language models - abstracting away the complexity of model selection, prompt orchestration, evaluation, and scaling. You'll help build a centralized GenAI layer that enables engineers to use best-in-class LLMs through clean APIs, configurable pipelines, and intuitive tooling.

The team operates with broad scope and high visibility, partnering across Machine Learning, Product, and Compliance to ensure every model integration is performant, secure, and compliant. Whether it's embedding LLMs in user-facing products or optimizing backend workflows, this team makes it seamless for Upstart Engineering to adopt and scale GenAI company-wide.

You'll be working in a digital-first company environment with offices in San Mateo, Columbus, and Austin. The role offers competitive compensation, comprehensive benefits, and the opportunity to work on cutting-edge AI technology that makes a real impact on financial inclusion.

This is an excellent opportunity for an experienced engineer passionate about AI/ML infrastructure who wants to help shape the future of AI-powered financial services while working with modern technologies like Python, Kubernetes, and various LLM frameworks.