Sr. Software Engineer, Frontend

Role

Prosper is hiring a Senior Frontend Engineer on the Personal Loans team to own borrower-facing experiences from rate check through funding. You will build and maintain cross-platform web and mobile applications, design shared component libraries, and drive measurable outcomes that impact conversion and borrower satisfaction.

Key Responsibilities

• Collaborate with product, design, backend, and quality engineers to deliver seamless borrower experiences across web and mobile.
• Own projects end-to-end: technical design, architecture, launch, iteration, and measurement.
• Build and evolve React and React Native applications within a pnpm/Turborepo monorepo.
• Design and maintain shared component libraries and cross-platform modules.
• Integrate with GraphQL (Apollo) and RESTful APIs in a performant, reliable, and secure manner.
• Improve performance, testing, accessibility, and developer experience.
• Uphold high standards of code quality and user experience in a regulated environment.
• Leverage AI-powered tools (coding assistants, automated testing, code review) to enhance productivity and establish best practices.
• Mentor peers and participate in code reviews to strengthen team capabilities.

Requirements

• BS in EE/CS with 8+ years of experience, or MS in EE/CS or related field with 6+ years of experience.
• Deep proficiency in React, React Native, and TypeScript; ability to work across web and mobile.
• Hands-on experience with GraphQL (Apollo) and RESTful APIs.
• Familiarity with monorepos (pnpm, Turborepo), bundlers (Vite), and CI/CD pipelines.
• Disciplined approach to automated testing using tools like Jest, Playwright, or Detox.
• Active use of AI coding assistants (Cursor, Copilot) and openness to AI-assisted development workflows.
• Strong UX/UI sensibility for high-stakes financial flows and excellent cross-functional communication.

Nice-to-Haves

• Experience with Expo and mobile deployment workflows (App Store, Google Play).
• Familiarity with Tamagui or styled-components and cross-platform styling systems.
• Background in fintech, lending, or regulated industries.
• Experience with feature flagging, A/B testing, and data-driven product development.
• Native mobile development experience (Swift or Kotlin).

Work Arrangement & Compensation

• Hybrid environment: 2 days per week in Prosper’s San Francisco office.
• Salary range: $173,000 - $205,000 annually, plus bonus and benefits. Final offer considers location and experience.

Benefits (selected)

• 401(k) with 5% company match
• Flexible time off and paid parental leave
• Annual wellness allowance and comprehensive health coverage
• Udemy access, childcare assistance, pet insurance, and Beneplace savings

Team & Process

• Progressive, test-driven Agile development methodology emphasizing communication, teamwork, sound design, and clean implementation.