Senior Software Engineer, Frontend

Prosper Marketplace

Senior Frontend Engineer at Prosper, democratizing access to credit through modern web applications. Collaborating in a hybrid environment to enhance borrower experiences in fintech.

Posted 5/2/2026full-timeSan Francisco • California • 🇺🇸 United StatesSenior💰 $173,000 - $205,000 per yearWebsite

Tech Stack

Tools & technologies

ApolloGraphQLJestReactReact NativeTypeScript

About the role

Key responsibilities & 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.

Requirements

What you’ll need

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.
Hands-on experience with **GraphQL (Apollo)** and **RESTful APIs** to power high-performance applications.
Familiarity with monorepos (pnpm, Turborepo), bundlers (Vite), and CI/CD pipelines to maintain a high-velocity development environment.
Disciplined approach to automated testing using tools like Jest, Playwright, or Detox to ensure systems are meticulous and trustworthy.
Active use of AI coding assistants (Cursor, Copilot) and a commitment to exploring new AI developments to enhance team productivity and solve product problems.
A sharp eye for UX/UI polish, ensuring high-stakes financial flows feel intuitive, professional, and reliable.
A proactive, high-accountability approach to driving projects to completion and unblocking yourself to deliver outcomes, not just outputs.
A deep focus on the "borrower behind the screen," sweating the details to maintain trust in a domain where financial accuracy is paramount.
Excellence in cross-functional communication and a dedication to elevating the team through clear mentorship and knowledge sharing.

Benefits

Comp & perks

A hybrid connection: We believe in the "best of both worlds" - a hybrid environment (2 days/week in our SF office) that balances high-touch collaboration with the flexibility of remote work.
Invested in your future: A competitive salary and a 401(k) with a 5% company match to help you build long-term financial security.
Holistic well-being: We provide the resources you need to thrive, from flexible time off and paid parental leave to an annual wellness allowance and comprehensive health coverage.
Professional & personal growth: Take advantage of a suite of premium perks, including Udemy access, childcare assistance, pet insurance, and a bevy of additional savings through Beneplace.

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Applicant Tracking System Keywords

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Hard Skills & Tools

ReactReact NativeTypeScriptGraphQLRESTful APIsautomated testingJestPlaywrightDetoxmonorepos

Soft Skills

cross-functional communicationmentorshipproactive approachhigh accountabilityattention to detailteam collaborationproblem-solvinguser experience focuscode reviewbest practices

Certifications

BS in EE/CSMS in EE/CS