UI/UX Designer, Sr.
Sundayy
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About the role
Role Overview
Senior UX/UI Designer on the UI/UX and Conversion Rate Optimization (CRO) team. As a senior individual contributor, you will own and maintain the web design system, lead UX strategy across digital properties, and ensure experiences are purposeful, on-brand, and conversion-optimized.
Responsibilities
- Build, maintain, and govern a comprehensive design system in Figma (typography, color palettes, components, and usage guidelines).
- Lead UX strategy for web/digital properties to ensure experiences align with business goals and user needs.
- Produce polished, developer-ready Figma files and clearly defend design decisions to stakeholders.
- Serve as a design authority for shared marketing resources, ensuring brand consistency and adherence to standards.
- Apply conversion rate optimization (CRO) thinking to improve web experiences.
Requirements
- 5+ years of professional UX/UI design experience with an end-to-end portfolio (research → design → developer handoff).
- Strong mastery of Figma, including components, variables, auto-layout, prototyping, and handoff.
- Deep UX expertise: user research, usability testing, journey mapping, and information architecture.
- Proven experience building and governing scalable design systems with cross-team adoption.
- Strong visual design skills (typography, color theory, layout, brand application).
- Proficiency with Adobe Creative Suite, especially Photoshop and Illustrator.
- Solid understanding of WCAG 2.1 and inclusive design.
- Ability to collaborate with developers and cross-functional teams to translate designs into feasible implementations.
- Excellent communication skills and ability to articulate design rationale.
Nice to Have
- Experience with AI tools for design concepting, rapid iteration, and asset generation.
- Motion design / micro-interactions; familiarity with CSS animations or After Effects.
- Experience with financial services/fintech or regulated industries.
- Familiarity with A/B testing and CRO principles.
- Experience working in Agile/sprint-based workflows.
About Sundayy
TradeStation is a leading online brokerage firm known for its innovative trading ecosystem for active traders and institutional clients. The company focuses on delivering award-winning web experiences and building an AI-First environment with responsible, ethical, secure, and transparent AI integrated into daily workflows.
Scraped 6/20/2026