Software Engineer

Who you are

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience, and 4+ years of professional software engineering experience
• Strong proficiency building backend services and APIs in a language such as Python, Java, Kotlin, Ruby, or Node.js
• Experience designing and working with REST or GraphQL APIs, data models, and distributed systems or service-oriented architectures
• Solid fundamentals in writing tested, maintainable code and collaborating through code review in a team environment
• Ability to work effectively with product and design partners to deliver features from requirements through production
• Experience building scalable, reliable systems for consumer-facing products with complex user journeys
• Familiarity with automated testing, CI/CD workflows, observability, and modern software development practices
• Exposure to fintech, lending, payments, or other regulated financial products
• Experience with experimentation, A/B testing, or feature flagging in production environments
• Active use of AI tools in engineering workflows, with a thoughtful perspective on how AI is reshaping software development
• Passion for building products that expand access to credit and improve financial outcomes for consumers

What the job involves

• Cash Line is one of Upstart's core lending products, helping borrowers access flexible credit through a seamless, digitally native experience
• The team owns critical parts of the borrower journey across offer generation, pricing, underwriting, funding, and account management, while partnering closely with the broader lending platform that powers Upstart at scale
• As a Software Engineer on the Cash Line team, you'll design, build, and operate the backend systems that power these experiences
• You'll work primarily with backend services, APIs, and data flows that support pricing, underwriting, funding, and account management
• This is a hands-on role where you'll own meaningful features end to end, collaborate across disciplines, and deepen your technical expertise on a business-critical product
• Design, build, and maintain reliable backend services and APIs that support Cash Line and the broader borrower journey
• Develop systems that power offer generation, pricing, underwriting, funding, and account management experiences
• Work across the stack as needed to integrate backend capabilities with borrower-facing applications and partner systems
• Partner closely with product managers, designers, and engineers to scope, build, and ship features that improve borrower flows and reduce friction
• Write well-tested, maintainable code and participate in code reviews, helping raise the quality and consistency of the team's codebase
• Contribute to the performance, scalability, reliability, and observability of the systems you own, and help diagnose and resolve issues across environments
• Support experimentation and iterative improvements by building flexible services and using data and customer feedback to inform what gets built next

Benefits

• Comprehensive health plans
• 401k Plan
• Annual wellness reimbursement
• Disability insurance
• Generous vacation policy
• Flexible time off
• Parental leave
• Family forming benefits through Carrot
• Technology equipment budget
• Personal development budget
• Various clubs and extracurricular activities
• Catered lunches
• Fully stocked micro-kitchen