Sr. UX Designer

San Francisco, CAProduct & User Experience – User Experience & Design /Full-Time Employee /HybridYour role in our missionThis position sits at the intersection of product design, technical platform work, and systems thinking. The Senior UX Designer on Foundations shapes the systems that ensure a consistent, secure, and accessible experience regardless of which product a customer is using. The work ranges from defining universal login patterns to designing unified payment flows, and it requires a designer who is as comfortable in an engineering conversation as in a design critique.The engineering team works in React-based frameworks and uses Figma alongside AI-assisted tooling, including Cursor and Figma MCP (Model Context Protocol). This role is not a handoff-oriented role. The expectation is active collaboration with engineering through implementation, supporting engineers in translating design decisions into production-quality work and catching fidelity issues before they compound.The team you’ll thrive withThe Foundations team owns the core services that much of Prosper's fintech portfolio depends on, including authentication and payments. Because this work sits at the platform level, design decisions here often have reach across multiple products and teams. This role also contributes to UX initiatives outside the Foundations team, including component infrastructure work that spans the broader product organization.How you’ll make an impactLead end-to-end UX design for authentication, payments, and other core platform services, from initial discovery through deliveryPartner with researchers by providing prototypes, design thinking, and artifact support that enable effective research across the platformServe as a thought partner to product managers, engineers, and security stakeholders, shaping how problems are framed before solutions are proposedDevelop and maintain clear, thorough design documentation that supports async decision-making, legal review, and cross-team alignmentNavigate legal and compliance approval workflows for features that intersect with financial regulation, security requirements, or data handlingDefine the design direction for Foundations features, including universal login and payment flows, and maintain the systems-level patterns that those features depend onCollaborate with engineers through implementation, reviewing production output against design intent, and flagging fidelity issues earlyUse AI-assisted tools, including Cursor and Figma MCP (Model Context Protocol), to reduce repetitive tasks and keep design-to-code workflows efficientContribute to cross-team UX initiatives, including component infrastructure work, that extend beyond FoundationsMentor UX team members on AI-assisted workflows and research-to-design best practicesSkills that will help you thrive8-10+ years of product design experience focusing on design systems, platform UX, or component libraries (or equivalent combination of education and experience)Deep fluency with Figma, including prototyping, auto-layout, component architecture, and design token managementHands-on experience in AI-assisted development environments such as Cursor, GitHub Copilot, or similar toolsSystems-oriented design approach: a track record of designing for scale, reuse, and consistency across multiple products or surfacesClear communication in cross-functional settings, with the ability to work effectively alongside engineering, product, and security stakeholdersConfidence operating in a fintech or similarly regulated product environmentExtra creditExperience with Figma MCP or other design-to-code pipeline toolingFront-end fluency sufficient to read and discuss React-based code alongside engineersBackground in accessibility standards applicable to financial productsPrior work on internal tooling or developer-facing design surfacesYour roadmap to successFirst 30 DaysLearn our products, design system, and compliance workflows while getting hands-on in Figma & Cursor to pair with engineering on initial tasks.By 60 DaysPartner with Product & Engineering to ship medium-complexity projects, using our design system and clear documentation to keep UI consistent and ready for legal review. By 90 DaysOwn complex, end-to-end projects with high autonomy, contributing to cross-team strategy, design system infrastructure, and AI-assisted workflows. $135,000 - $169,000 a yearCompensation details: The salary for this position is $135,000 - $169,000 annually, plus bonus and generous benefits. In determining your salary, we will consider your location, experience, and other job-related factors.#LI-AR1We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.