Senior Frontend Engineer - React/React Native, AI UX

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

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.