Sr. User Interface Designer

Job Summary

Monolithic Power Systems, Inc. (MPS) is seeking a Senior UI Designer to lead visual and UI design across digital experiences, including our website, marketing materials, and proprietary software front‑ends. The role focuses on expanding brand elements, defining global brand guidelines, and building a scalable design system to ensure consistency across all customer‑facing touchpoints.

• Lead visual and UI design for web and software interfaces.
• Develop and maintain our design system, including components, variables, and style guides optimized for web and software applications.
• Define and uphold brand guidelines for all digital touchpoints, ensuring brand consistency.
• Collaborate closely with developers throughout the project lifecycle—hand‑off, usability testing, and iterative improvements.
• Lead product‑focused web projects in partnership with designers, writers, and digital marketing teams to create compelling campaign experiences.
• Partner with product teams to understand web experience needs and recommend holistic design solutions for significant updates and improvements.
• Drive improvements to design and development workflows by implementing best practices for responsive web solutions and reusable UI components.
• Conduct user research and create high‑fidelity mockups, prototypes, and visual assets.
• Ensure all designs adhere to accessibility standards and platform‑specific UI conventions.

• 5+ years of professional experience as a Visual Designer with a focus on building and implementing design systems for web and software applications.
• Expert‑level proficiency in Figma, including advanced features such as component creation, auto‑layout, variants, and team libraries.
• Compelling online portfolio showcasing design principles, user‑centered design, and extensive experience with design systems.
• Solid understanding of front‑end development technologies (HTML, CSS, JavaScript) and how they relate to implementation.
• Experience working directly with developers is essential.
• Experience defining and documenting brand guidelines for digital experiences.
• Deep knowledge of accessibility standards (WCAG) and best practices.
• Exceptional communication, presentation, and interpersonal skills.
• Ability to lead projects, present design rationale, and collaborate effectively with cross‑functional teams.
• Demonstrated ability to manage multiple web projects simultaneously, prioritize tasks, and meet deadlines.
• Strong analytical and problem‑solving skills with a proactive, self‑directed approach.

Kirkland, WA (onsite)

Pay is based on market location and may vary. The base salary range for this position in Washington is $100,000 - $125,000.

We offer a comprehensive benefits package including health, dental, vision, life, and disability protection. Employees in certain positions may be eligible for stock compensation.

Monolithic Power Systems, Inc. is an Equal Opportunity Employer and embraces diversity in our employee population. It is the policy of MPS to provide equal opportunity to all qualified applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status or special disabled veteran, marital status, pregnancy, genetic information, or any other legally protected status.