Sr. Software Engineer, React/ React Native

Prosper Marketplace; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Prosper Marketplace in San Francisco is seeking a Senior Frontend Engineer to own borrower-facing experiences from rate check through funding. You will build and maintain web and mobile applications using React, React Native, and TypeScript, with a focus on performance and accessibility.

Join a team investing in AI-assisted development and cross-functional collaboration with product, design, and backend engineers to deliver measurable impact.

Qualifications

• BS in EE/CS or higher with 6+ years of relevant experience or MS with 6+ years.
• Strong proficiency in React, React Native and TypeScript.
• Experience integrating GraphQL and RESTful APIs at scale.

Responsibilities

• Collaborate within a cross-functional team that includes product, design, backend engineering, and QA to deliver seamless borrower experiences across web and mobile.
• Own projects end to end—from technical design to launch, iteration, and measurement.
• Build and evolve React and React Native apps within a pnpm/Turborepo monorepo.
• Design and maintain shared component libraries and cross-platform modules.
• Partner with backend and platform teams to integrate GraphQL and RESTful APIs.
• Identify and drive performance, testing, accessibility, and DX improvements.
• Uphold high standards of code quality and UX in a regulated environment.
• Leverage AI-powered tools to accelerate development and establish best practices.
• Contribute to a strong, inclusive engineering culture through mentoring and code reviews.

Skills

React

React Native

TypeScript

GraphQL

RESTful APIs

Education

BS in EE/CS with 8+ years of experience or MS in EE/CS or other applicable disciplines with 6+ years of experience

Tools

GraphQL (Apollo)

RESTful APIs

Job description

Your role in our mission

At Prosper, we're building the technology that makes borrowing simpler, faster, and more transparent. Our vision is to advance financial well-being by democratizing access to credit -- meeting people wherever they are, on any device. We're looking for exceptional talent to help us get there.

As a Senior Frontend Engineer on the Personal Loans team, you will own the borrower-facing experiences that drive Prosper's core business -- from rate check through funding. Using modern web and mobile technologies, you will build and maintain the applications that guide borrowers through one of the most important financial decisions they'll make. Your work will directly impact conversion, borrower satisfaction, and Prosper's top-line growth.

We are investing heavily in AI across our engineering organization -- from AI-assisted development workflows to intelligent borrower experiences. You'll be joining a team that actively embraces AI tools to accelerate delivery, improve code quality, and explore new ways to make the borrower journey smarter and more personalized.

How You’ll Make An Impact

• Collaborate within a cross-functional team that includes product, design, backend engineering, and quality engineers to deliver seamless borrower experiences across web and mobile.
• Own projects end to end -- from technical design and architecture through launch, iteration, and measurement -- driving outcomes that move the business forward.
• Build and evolve our React and React Native applications within a pnpm/Turborepo monorepo, shipping features that work beautifully on every platform.
• Design and maintain shared component libraries and cross-platform modules that accelerate development across multiple product teams.
• Partner with backend and platform engineering teams to integrate with GraphQL and RESTful APIs in a performant, reliable, and secure manner.
• Identify and drive improvements in performance, testing, accessibility, and developer experience that make the entire team more effective.
• Uphold high standards of code quality and user experience while iterating rapidly in a regulated environment.
• Leverage AI-powered tools (coding assistants, automated testing, code review) to amplify your productivity and help establish best practices for AI-assisted development across the team.
• Contribute to a strong, inclusive engineering culture by mentoring peers, championing best practices, and participating in thoughtful code reviews.

Skills That Will Help You Thrive

• BS in EE/CS with 8+ years of experience or MS in EE/CS or other applicable disciplines with 6+ years of experience
• Deep proficiency in React, React Native, and TypeScript, with the versatility to move seamlessly between web and mobile platforms if applicable.
• Hands-on experience with GraphQL (Apollo) and RESTful APIs to power high-performance applications