Note The job is a remote job and is open to candidates in USA. Billtrust is a leader in B2B accounts receivable workflow and payment software, providing AI-powered solutions for finance leaders. The Lead UX Designer will drive product design strategy and execution, focusing on creating high-quality, AI-native product experiences and mentoring junior designers. Responsibilities Drive end-to-end design for complex, multi-step SaaS products — from early-stage problem framing through high-fidelity prototyping and handoff Lead the creation of cross-platform user flows, interaction models, and design specifications that translate cleanly to engineering Design AI-native product experiences — including conversational UI, predictive features, AI output states, and human-AI interaction patterns — with the same rigor applied to any other product surface Leverage AI design tools and agentic workflows to accelerate exploration, generate design variations, and reduce time-to-validation Champion design quality across the team, establishing patterns and raising the bar on craft, consistency, and usability Plan and execute user research — generative and evaluative — to continuously inform product direction Synthesize qualitative and quantitative signals (usability studies, analytics, customer feedback, market analysis) into clear design recommendations Work fluently with product analytics tools (e.g., Amplitude, Mixpanel) — pull your own data, form hypotheses, and connect design decisions to measurable outcomes Identify friction and opportunity in existing experiences; drive validated improvements backed by evidence, not assumptions Frame design problems with clarity — connecting user needs to business outcomes and technical constraints Actively contribute to product strategy conversations; push back constructively when proposed solutions don't serve users or undermine long-term product integrity Collaborate cross-functionally with product, engineering, and stakeholders throughout the full design-to-delivery cycle Contribute to and maintain the team's design system, ensuring consistency and scalability across the product surface Mentor and coach junior and mid-level designers; provide structured, actionable feedback on work and process Model how to use AI tools thoughtfully in a design workflow — not as a shortcut, but as a multiplier for quality and speed Help shape team processes, critique culture, and design standards Skills 8+ years of product design experience, with demonstrated progression into a lead or senior IC role Portfolio showing end-to-end ownership of complex B2B or enterprise SaaS product design — design thinking, not just visual execution Deep proficiency in Figma, including component libraries, auto-layout, and prototyping Hands-on experience with design systems — building, scaling, and governing them Strong research chops usability testing, interviews, synthesis — you know when to do which and how to act on what you find Demonstrated data literacy comfortable pulling and interpreting product analytics to inform and validate design decisions Proven ability to influence product direction and navigate stakeholder dynamics with confidence and clarity Familiarity with front-end principles (HTML/CSS concepts); enough to design with engineering constraints in mind Experience designing AI-powered product features (conversational UI, predictive interfaces, AI error/confidence states) Hands-on use of AI design tools — generative UI, AI-assisted prototyping, synthetic user research methods, or similar Background designing for fintech, payments, or financial operations workflows Experience leading or mentoring other designers in a cross-functional product team Benefits Comprehensive health coverage Competitive retirement Generous PTO and parental leave Flexible work options Meaningful investment in your professional development Extra incentives like equity, commissions, or other variable performance-related bonuses (if qualified) Company Overview Billtrust develops a payment cycle management platform designed to automate every step in the invoice-to-cash process. It was founded in 2001, and is headquartered in Lawrenceville, New Jersey, USA, with a workforce of 501-1000 employees. Its website is https//billtrust.com.