Lead UX Designer

Who We Are Finance leaders choose Billtrust to get paid faster, control costs, and maximize customer satisfaction. As the leader in B2B accounts receivable workflow and payment software, we provide the world’s leading brands with AI-powered solutions across the full AR lifecycle—from invoice presentment and payment processing to cash application and collections. With over 2,600 global customers, more than $1 trillion in invoice dollars processed, and a proprietary network of 13 million buyers, Billtrust delivers business value through deep industry expertise and a culture relentlessly focused on meaningful customer outcomes. We’re an AI-first company, not just in what we build for our customers, but in how we work. Across every function, our teams use AI tools daily to work faster, make better decisions, and deliver higher-quality outcomes. We hire exceptional people, give them cutting-edge AI capabilities, and measure success by the impact they create. If you want to do the best work of your career at the frontier of AI and fintech, Billtrust is the place to do it. Our Values Customers We relentlessly increase value for customer and do the right thing for them. Action We make ‘thoughtfully fast’ decisions, act quickly, cut through red tape, deliver progress not perfection, take ownership and accountability. Team Spirit We put the team ahead of ourselves, foster trust and respect, collaborate with passion, despise toxic politics, value our differences, and celebrate together. Innovation We challenge the status quo, experiment thoughtfully, and are novel and brilliant in what we create. Excellence We love to win, but we hate losing even more. We aspire to be the best and take pride in our work. When we fall short, we own it and come back stronger. About the Role: The Lead UX Designer drives product design strategy and execution across the team, setting the standard for quality, craft, and research rigor. This role owns complex problem spaces end-to-end — from framing opportunities and validating hypotheses with users, to delivering high-fidelity, production-ready designs across web and platform experiences. The Lead UX Designer operates at the intersection of user insight, business strategy, and emerging technology. That includes designing products that incorporate AI features — conversational interfaces, predictive UI, AI error and confidence states, human-AI handoff moments — as well as using AI tools to accelerate and sharpen the design process itself. This is a role for someone who thinks in systems, leads through influence, and thrives in an environment where design decisions have real commercial consequences. What You'll Do: Design Leadership & Execution 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. Research & Insight 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.