Senior UI Designer: Design Systems, Motion & Prototyping

OverviewSee how Epsilon powers connected marketing by unlocking the full potential of data and identity. You are the craft voice at the intersection of design and implementation — pushing visual fidelity and polish on Epsilon's CORE UI design system until it's the kind of enterprise SaaS that makes people stop and say "wow." You partner across Product Design and Engineering, building future-facing prototypes and shipping production components with an unrelenting eye for detail, motion, and finish. You bring deep design systems fluency, a refined sense for micro-interactions, and you use AI tools to move fast without ever cutting polish. This is a rare shot to define what best-in-class SaaS UI looks like, at a company where design has a real seat at the table. ResponsibilitiesPush the visual quality bar on CORE UI — tokens, components, motion, and interaction — across Figma and production code. Build coded, future-facing prototypes in Cursor that show what "wow" looks like before a line of production code is written. Partner with engineers to close the gap between design intent and shipped reality — reviewing implementations, writing production-quality CSS when needed, and refusing to let polish slip. Sweat the details on complex flows — every edge case, empty state, and loading moment considered and refined. Help shape the craft standards the whole system is held to. Qualifications6+ years in UI design, development, or a hybrid role. Portfolio must show shipped, polished SaaS or related digital product work. Hands-on experience evolving a design system in both Figma and code (Angular/React, Storybook, tokens, etc.). A strong, opinionated eye for motion and micro-interaction — polished, purposeful, never decorative. Fluency in high-fidelity prototyping that convincingly simulates a finished, delightful product. Working knowledge of HTML, CSS (animation, transitions, custom properties), and JS/TS — enough to implement and critically review production UI. An online portfolio with live, interactive work that shows real visual craft, not just static screens. Why you might stand out from other talent You've shipped work at a level of visual polish most enterprise teams don't even attempt. Your portfolio shows the "wow" — motion, transitions, details where craft was clearly non-negotiable. You treat AI tools as a creative partner for exploring and validating design directions faster. You move fluidly between Figma and code without losing fidelity in either direction. You believe enterprise software deserves consumer-grade polish, and you've proven it. Additional InformationWhen you join Epsilon, we’ll create something EPIC together.We’re a global leader in data and identity, with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services. Positioned at the center of Publicis Groupe, Epsilon helps brands deliver personalized experiences at scale and build lasting customer relationships by unlocking the full potential of data and identity. Epsilon operates in 30+ countries across EMEA, the Americas and APAC, with more than 8,000 employees. Check out a few of these resources to learn more about what makes Epsilon so EPIC: Our Culture: Life at Epsilon: Epsilon has five values that define our culture and guide us as we create value for our clients, our people and consumers. We seek candidates who align with our company values, demonstrate them and make them meaningful in their day-to-day work: Act with integrity. We are transparent and have the courage to do the right thing. Work together to win together. We believe collaboration is the catalyst that unlocks our full potential. Innovate with purpose. We shape the market with big ideas that drive big outcomes. Respect all voices. We embrace differences and foster a culture of connection and belonging. Empower with accountability. We trust each other to own and deliver on common goals. Because You Matter As an Epsilon employee, you deserve perks and benefits that put you, your family and your finances first. Our benefits encompass a wide range of offerings, including but not limited to: Time to recharge: Flexible time off (FTO), 14 paid holidays, paid sick time Family well-being: Parental/new child leave, childcare & elder care assistance, adoption assistance Extra perks: Comprehensive health coverage, 401(k), tuition assistance, commuter benefits, professional development, employee recognition, charitable donation matching, health coaching and counseling Epsilon benefits are subject to eligibility requirements and other terms. Epsilon is an Equal Opportunity Employer. Epsilon’s policy is not to discriminate against any applicant or employee based on actual or perceived race, age, sex or gender (including pregnancy), marital status, national origin, ancestry, citizenship status, mental or physical disability, religion, creed, color, sexual orientation, gender identity or expression (including transgender status), veteran status, genetic information or any other characteristic protected by applicable federal, state or local law. Epsilon also prohibits harassment of applicants and employees based on any of these protected categories. Epsilon will provide accommodations to applicants who need accommodations to complete the application process. Please reach out to View email address on click.appcast.io to request an accommodation. For San Francisco Bay and Los Angeles Areas: Epsilon will consider qualified applicants with criminal histories for employment in a manner consistent with the City of Los Angeles’ Fair Chance Initiative for Hiring Ordinance and San Francisco Police Code Sections 4901-4919, commonly referred to as the San Francisco Fair Chance Ordinance. Applicants with criminal histories are welcome to apply. #LI-TG1 Compensation Range: USD $67,800.00 - USD $126,000.00/Annually. This is the pay range the Company believes it will pay for this position at the time of this posting. Consistent with applicable law, compensation will be determined based on the skills, qualifications, and experience of the applicant along with the requirements of the position, and the Company reserves the right to modify this pay range at any time. Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan through a third-party benefits administration system once certain criteria have been met. For regular roles, the Company will offer medical coverage, dental, vision, disability, 401k, and paid time off. The Company anticipates the application deadline for this job posting will be 11/9/2026. #J-18808-Ljbffr Publicis Groupe