Sr. User Interface Designer

📍 Job Overview

Job Title: Sr. User Interface Designer

Company: Monolithic Power Systems, Inc.

Location: Kirkland, WA

Job Type: FULL_TIME

Category: UI/UX Design & Operations

Date Posted: 2026-06-23

Experience Level: 5-10 Years

🚀 Role Summary

• Drive the visual direction and UI design for critical digital experiences, including the company website and proprietary software interfaces, ensuring a cohesive and impactful brand presence.

• Develop, maintain, and scale a comprehensive design system, encompassing components, variables, and style guides, to ensure consistency and efficiency across all customer-facing touchpoints.

• Define and uphold global brand guidelines for web experiences, establishing a robust visual identity that resonates with target audiences.

• Foster a collaborative environment between Creative, Product, and Development teams, acting as a key driver for transforming digital design approaches and project execution.

• Own projects end-to-end, implementing best-in-class design processes and significantly impacting the company's digital presence through system-level design and visual consistency.

📝 Enhancement Note: While the job title is "Sr. User Interface Designer," the responsibilities explicitly mention driving visual direction, defining brand guidelines, and implementing design systems for both web and software applications. This suggests a role that bridges traditional UI design with aspects of operations through system thinking, process implementation, and cross-functional collaboration to ensure brand and user experience consistency at scale. The emphasis on "system-level design" and "scalability" points towards an operations-minded approach to design.

📈 Primary Responsibilities

• Lead the visual and UI design strategy for a diverse range of digital experiences, encompassing the company website and internal/external software interfaces.

• Develop, document, and champion a scalable design system, including reusable UI components, design tokens, and comprehensive style guides, optimized for both web and software applications.

• Define, implement, and enforce brand guidelines across all digital touchpoints, ensuring a unified and recognizable brand identity.

• Collaborate closely with front-end developers throughout the entire project lifecycle, facilitating seamless design handoffs, iterative usability testing, and continuous design improvements.

• Partner with product teams to deeply understand user needs and recommend holistic, data-informed design solutions for significant website updates and feature enhancements.

• Drive significant improvements to design and development workflows by implementing best practices for responsive web solutions and the adoption of reusable UI components.

• Conduct thorough user research, translate findings into high-fidelity mockups, interactive prototypes, and polished visual assets that meet user needs and business objectives.

• Ensure all designs strictly adhere to established accessibility standards (WCAG) and platform-specific UI conventions to maximize usability and inclusivity.

📝 Enhancement Note: The responsibilities highlight a strong emphasis on process and systems thinking, which are core to operations roles. "Develop and maintain our design system," "Define and uphold brand guidelines," "Drive improvements to design and development workflows," and "implementing best practices" all point to an operational approach to design execution and scalability.

🎓 Skills & Qualifications

Education: A Bachelor's degree in Graphic Design, Interaction Design, Human-Computer Interaction, or a related field is typically expected for a senior-level role, though equivalent practical experience will be strongly considered.

Experience: 5+ years of professional experience as a Visual Designer or UI Designer, with a demonstrated focus on building and implementing robust design systems for both web and software applications.

Required Skills:

• Expert-level proficiency in Figma, including advanced features such as component creation, auto layout, variants, and team libraries. Demonstrated ability to lead and mentor others in Figma best practices.

• A compelling online portfolio showcasing a strong understanding of core design principles, user-centered design methodologies, and extensive hands-on experience with design systems.

• Solid understanding of front-end development technologies (HTML, CSS, JavaScript) and their implications for design implementation. Essential experience working collaboratively and directly with developers.

• Proven experience defining, documenting, and enforcing brand guidelines for digital experiences.

• Deep knowledge of accessibility standards (WCAG 2.0/2.1 AA) and best practices for inclusive design.

• Exceptional communication, presentation, and interpersonal skills, with the ability to clearly articulate design rationale and effectively collaborate with cross-functional teams.

• Demonstrated ability to manage multiple complex web projects simultaneously, effectively prioritize tasks, and consistently meet deadlines in a fast-paced environment.

• Strong analytical and problem-solving skills, coupled with a proactive, self-directed approach to identifying and resolving design challenges. Preferred Skills:

• Experience with other design and prototyping tools (e.g., Sketch, Adobe Creative Suite, InVision).

• Familiarity with user research methodologies and usability testing practices.

• Experience in the semiconductor industry or a related technical field, understanding complex product information.

• Knowledge of front-end frameworks (e.g., React, Angular, Vue.js) and their design implications.

📝 Enhancement Note: The requirement for "expert-level proficiency in Figma, including advanced features like component creation, auto layout, variants, and team libraries" and the expectation to "lead others in Figma best practices" points to a need for someone who can operationalize design tooling and processes for efficiency. The emphasis on working "directly with developers" and understanding "front-end development technologies" further solidifies the need for a practical, systems-oriented approach, crucial for effective design operations.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase at least 2-3 comprehensive case studies demonstrating the end-to-end design process for complex digital projects, with a clear focus on design system development and implementation.

• Include detailed examples of how you’ve built, maintained, or significantly contributed to a design system, highlighting component libraries, style guides, and usage documentation.

• Demonstrate proficiency in creating high-fidelity mockups, interactive prototypes, and visual assets, with clear explanations of design decisions and user-centered rationale.

• Present work that clearly illustrates adherence to brand guidelines and accessibility standards (WCAG), with specific examples of how these were integrated into the design process.

• Provide evidence of collaboration with development teams, including examples of design handoffs, iterative feedback loops, and problem-solving during implementation. Process Documentation:

• Clearly articulate your approach to design system governance, including how components are created, updated, and versioned.

• Describe your methodology for translating user research and business requirements into actionable design solutions and scalable UI patterns.

• Detail your process for ensuring design and development workflow efficiency, including strategies for reusable components and streamlined handoffs.

• Illustrate how you measure the impact of design decisions and system implementation, ideally with examples of metrics or KPIs related to user experience, efficiency, or brand consistency.

📝 Enhancement Note: For a role emphasizing design systems and process, the portfolio must go beyond visual aesthetics. It needs to demonstrate a deep understanding of how to operationalize design at scale. This includes showcasing the creation and maintenance of design systems, collaboration with development for efficient implementation, and a structured approach to documentation and process improvement.

💵 Compensation & Benefits

Salary Range: The stated base salary range for this position in Washington is $100,000 - $125,000 per year.

Benefits:

• Comprehensive Health Care Coverage

• Dental Insurance

• Vision Insurance

• Life Protection

• Disability Protection

• Eligibility for Sales Incentive Bonuses (for sales positions, though may indicate a strong performance-driven culture)

• Potential for Stock Compensation (depending on position)

Working Hours: The standard work week is typically 40 hours. Specific daily schedules may vary but are expected to align with core business hours for effective team collaboration.

📝 Enhancement Note: The salary range provided ($100,000 - $125,000 USD annually for Washington) reflects a senior-level designer role in a high-cost-of-living area. This range is competitive for experienced professionals in the UI/UX design field, particularly those with specialized skills in design systems and front-end collaboration. The mention of potential stock compensation and sales bonuses suggests a performance-oriented culture where contributions can be significantly recognized.

🎯 Team & Company Context

🏢 Company Culture

Industry: Monolithic Power Systems, Inc. (MPS) operates in the Semiconductor industry, a highly technical and innovation-driven sector. This context implies a need for designers to understand complex technical products and communicate them effectively through user interfaces. The company's focus on "leading-edge products and innovation" suggests a culture that values forward-thinking and continuous improvement.

Company Size: MPS is described as one of the fastest-growing companies in the semiconductor industry. While an exact headcount isn't provided in the raw data, rapid growth often signifies a dynamic, evolving environment with increasing opportunities and potential for process development. This growth phase can be ideal for operations-minded individuals looking to shape and optimize new systems.

Founded: Founded in 1997, MPS has a solid history in the semiconductor market, indicating stability and established expertise. This longevity suggests a company with a strong foundation and a proven track record, which can translate into well-defined, albeit evolving, operational processes.

Team Structure:

• The role of Sr. UI Designer is positioned to collaborate closely with "Creative, Product, and Development teams," and specifically "designers, writers, and digital marketing teams" for web projects. This indicates a cross-functional team structure where design is integrated into broader go-to-market and product development efforts.

• The Sr. UI Designer is expected to "lead projects end-to-end" and "partner with product teams," suggesting a degree of autonomy and leadership within design initiatives.

• The design system development implies a specialized design function that supports broader product and marketing efforts, requiring strong internal client management and alignment. Methodology:

• The company emphasizes "cultivating creativity," being "passionate about sustainability," and "providing leading-edge products and innovation." For design operations, this translates to an environment that encourages creative problem-solving within structured frameworks and a focus on efficient, sustainable design practices.

• The role's responsibilities point to a data-driven approach through user research and the implementation of best practices, aiming for measurable improvements in digital experiences and workflows.

Company Website: www.monolithicpower.com

📝 Enhancement Note: The company's industry (Semiconductor) and growth trajectory are critical for understanding the context of this UI design role. It suggests a need for designers who can translate complex technical information into user-friendly interfaces and who can adapt to a fast-paced, evolving operational landscape. The emphasis on innovation and customer focus implies that design plays a strategic role in business success.

📈 Career & Growth Analysis

Operations Career Level: This role is clearly defined as "Sr. User Interface Designer," indicating a senior individual contributor position. It requires a high degree of autonomy, strategic input on design systems and brand guidelines, and the ability to lead projects and mentor others. This level often serves as a stepping stone to Lead Designer, Design Manager, or specialized roles within Design Operations.

Reporting Structure: While not explicitly stated, a Sr. UI Designer typically reports into a Design Manager, Creative Director, or Head of Product Design. The role's responsibility to collaborate with Product and Development teams suggests frequent interaction with these departments, potentially including product managers and engineering leads.

Operations Impact: The Sr. UI Designer is expected to have a significant impact on the company's digital presence by:

• Ensuring brand consistency across all touchpoints, which directly affects brand perception and customer trust.

• Improving user experience through well-designed interfaces and effective design systems, potentially leading to increased customer engagement, reduced support inquiries, and higher conversion rates.

• Driving efficiency in design and development workflows through robust design systems, enabling faster product iteration and reduced development costs.

• Contributing to the overall effectiveness of marketing campaigns and customer acquisition efforts through compelling web experiences. Growth Opportunities:

• Design System Leadership: Opportunity to become the go-to expert and leader for the company's design system, potentially expanding its scope and influence across more product lines.

• Process Optimization: Lead initiatives to further refine and automate design and development workflows, contributing to Design Operations maturity.

• Mentorship and Team Development: Mentor junior designers, share Figma expertise, and contribute to building a stronger design culture within the organization.

• Cross-functional Influence: Expand influence beyond design into product strategy and development process improvements by demonstrating the value of user-centered design and systematic approaches.

• Specialization: Develop expertise in specific areas such as accessibility, responsive design at scale, or the design of complex software interfaces within a technical domain.

📝 Enhancement Note: This Sr. UI Designer role offers significant growth potential by focusing on the "operations" of design: building scalable systems, optimizing workflows, and ensuring consistency. This path can lead to leadership roles in Design Operations or advanced individual contributor positions focusing on strategic design system architecture. The semiconductor industry context also provides opportunities to deepen expertise in a niche, high-impact field.

🌐 Work Environment

Office Type: The role is specified as "on site" in Kirkland, WA, indicating a traditional office-based work environment. This setting typically fosters direct collaboration, spontaneous idea sharing, and a stronger team cohesion compared to remote setups.

Office Location(s): Kirkland, WA. This location in the Seattle metropolitan area places the employee within a tech-rich ecosystem, potentially offering access to industry events and a diverse talent pool.

Workspace Context:

• Collaborative Environment: As an on-site role, the workspace will likely facilitate close collaboration with cross-functional teams, including developers, product managers, and marketing specialists, fostering a dynamic exchange of ideas and rapid problem-solving.

• Tools and Technology: Expect access to standard design software and hardware, with a strong emphasis on Figma as the primary tool. The company's focus on innovation suggests a commitment to providing necessary technological resources for efficient design work.

• Team Interaction: The opportunity to work directly with other designers, developers, and product stakeholders on a daily basis will be a key aspect of the workspace, promoting a culture of shared ownership and continuous learning.

Work Schedule: The standard work schedule is likely 40 hours per week, with flexibility expected to accommodate project deadlines and collaborative needs. The on-site nature implies adherence to typical office operating hours for team synchronization.

📝 Enhancement Note: The "on site" requirement in Kirkland, WA, suggests a preference for in-person collaboration, which is often beneficial for complex design system development and rapid iteration cycles. This environment can foster stronger team dynamics and more immediate feedback loops, crucial for operationalizing design processes effectively.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your resume and portfolio to assess foundational qualifications and experience, particularly in design systems and Figma proficiency.

• Portfolio Presentation: A dedicated session where you'll walk through selected case studies from your portfolio, explaining your design process, rationale, challenges, and outcomes. Be prepared to discuss your role in building and maintaining design systems and how you collaborate with developers.

• Technical/Skills Assessment: This may involve a design challenge or a deep dive into your Figma expertise, assessing your ability to create components, manage libraries, and implement best practices. You might also be asked about your understanding of front-end technologies and accessibility.

• Cross-functional Interviews: Discussions with Product Managers, Developers, and potentially Marketing leads to evaluate your collaboration style, communication skills, and ability to integrate design into broader business objectives.

• Final Interview: A meeting with a senior leader or hiring manager to discuss overall fit, career aspirations, and strategic contributions.

Portfolio Review Tips:

• Focus on Design Systems: Dedicate significant space to case studies showcasing your experience with design systems. Detail your approach to component architecture, documentation, and adoption.

• Demonstrate Figma Mastery: Highlight specific Figma features you utilized (auto layout, variants, components, libraries) and explain how they contributed to efficiency or scalability.

• Showcase Collaboration: Include examples of how you worked with developers, product managers, and other stakeholders. Explain your design handoff process and how you incorporated feedback.

• Quantify Impact: Whenever possible, use metrics to illustrate the impact of your work. This could include improvements in design consistency, development efficiency, user satisfaction, or accessibility compliance.

• Tell a Story: Structure your case studies to narrate a problem, your solution, and the results, making your contributions clear and memorable.

Challenge Preparation:

• Design System Component: You might be asked to create a new component or refactor an existing one within a provided Figma file, adhering to existing patterns or establishing new ones.

• Workflow Optimization Scenario: Prepare to discuss how you would improve a given design or development workflow, focusing on efficiency, reusability, and collaboration.

• Accessibility Audit: You may be asked to identify and propose solutions for accessibility issues in a given design or prototype.

• Stakeholder Communication: Be ready to articulate your design decisions and system rationale to a non-design audience, focusing on business value and user impact.

📝 Enhancement Note: The application process will heavily scrutinize your portfolio for evidence of design system expertise and operational efficiency. Be prepared to demonstrate not just your design skills, but your ability to build and maintain scalable design infrastructure and collaborate effectively with technical teams.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: Expert-level proficiency is mandatory, including advanced features for component creation, auto layout, variants, and team libraries. This will be the core tool for design system development and collaboration.

• Prototyping Tools: Proficiency in Figma's prototyping features, or potentially other tools like InVision, for creating interactive user flows and testing design concepts.

• Visual Design Software: While Figma is primary, familiarity with Adobe Creative Suite (Photoshop, Illustrator) may be beneficial for asset creation or specific graphic design tasks.

Analytics & Reporting:

• User Research Tools: Experience with tools for conducting user interviews, surveys, and usability testing (e.g., UserTesting.com, Maze, Qualtrics).

• Web Analytics: Familiarity with web analytics platforms (e.g., Google Analytics) to understand user behavior on the website and inform design decisions.

CRM & Automation:

• Front-end Technologies: A solid understanding of HTML, CSS, and JavaScript is crucial for effective design implementation and collaboration with developers.

• Accessibility Checkers: Tools to audit designs against WCAG standards (e.g., WAVE, AXE).

📝 Enhancement Note: The technology stack emphasizes Figma as the central tool for operationalizing design through a robust design system. The inclusion of front-end technologies and accessibility tools highlights the practical, implementation-focused nature of this role, bridging the gap between design and development operations.

👥 Team Culture & Values

Operations Values:

• Efficiency & Scalability: A strong emphasis on creating design solutions and systems that are efficient to build, maintain, and scale across multiple platforms and products.

• Collaboration & Communication: A value placed on open, clear communication and strong partnerships with Product, Engineering, and Marketing teams to achieve shared goals.

• User-Centricity: A commitment to understanding and advocating for user needs through research and iterative design, ensuring that digital experiences are intuitive and valuable.

• Innovation & Quality: A drive to deliver cutting-edge products and solutions that meet high standards of visual design, usability, and technical execution.

• Process Improvement: An ongoing effort to refine workflows, adopt best practices, and leverage tools to enhance the overall design and development process.

Collaboration Style:

• Integrated Design: Design is not an isolated function but is deeply integrated into product development and marketing initiatives. Expect close working relationships and shared ownership with cross-functional teams.

• Data-Informed Decisions: Collaboration will involve leveraging user research, analytics, and feedback from various teams to inform design strategies and validate solutions.

• Constructive Feedback Culture: An environment where designers, developers, and product managers openly share feedback to collectively improve designs and processes.

• Knowledge Sharing: Opportunities to share expertise, particularly around design systems and Figma, through workshops, documentation, and informal discussions.

📝 Enhancement Note: The company's values, as inferred from their industry focus and growth, likely emphasize innovation, technical excellence, and customer impact. For this role, these translate into a need for design processes that are efficient, scalable, and collaborative, ensuring that the visual output directly supports business objectives and user needs.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Global Brand Consistency with Local/Product Needs: Ensuring a unified design system and brand identity while accommodating the specific requirements of different software applications or marketing campaigns.

• Driving Adoption of Design Systems: Overcoming potential resistance to change and ensuring that development teams and other designers consistently adopt and utilize the design system effectively.

• Integrating Design with Rapid Development Cycles: Keeping pace with fast-moving product development timelines in a growing tech company while maintaining high design quality and strategic alignment.

• Translating Complex Technical Concepts: Effectively visualizing and simplifying complex semiconductor product information for various digital audiences.

• Continuous Learning in a Evolving Tech Landscape: Staying current with the latest UI/UX trends, design tools, and front-end technologies, especially within the fast-paced semiconductor industry.

Learning & Development Opportunities:

• Design Operations Maturity: Contribute to and learn about the evolution of Design Operations within a growing company, potentially shaping processes and best practices.

• Advanced Figma Techniques: Deepen expertise in Figma's advanced features and potentially explore its API for automation opportunities.

• Cross-Disciplinary Understanding: Gain deeper insights into semiconductor technology, product development lifecycles, and digital marketing strategies.

• Leadership and Mentorship: Develop leadership skills by guiding projects, mentoring junior designers, and influencing design strategy.

• Accessibility Expertise: Become a subject matter expert in web accessibility, ensuring compliance and championing inclusive design principles across the organization.

📝 Enhancement Note: The challenges presented are common in growing tech companies with evolving design functions. Success in this role will depend on the candidate's ability to navigate these challenges operationally—through robust systems, clear communication, and proactive problem-solving—while also seizing the growth opportunities to advance their career in design operations and technical product design.

💡 Interview Preparation

Strategy Questions:

• "Describe your process for developing and scaling a design system from inception to widespread adoption. What were the key challenges and how did you overcome them?" (Focus on your operational approach, documentation, and collaboration with dev.)

• "How do you ensure brand consistency across diverse digital touchpoints (website, software interfaces, marketing materials) while allowing for product-specific needs?" (Highlight your strategy for brand governance and system flexibility.)

• "Walk us through a project where you collaborated closely with developers. What was your handoff process, how did you handle iterations, and what did you learn about front-end implementation?" (Emphasize your understanding of dev constraints and collaborative problem-solving.)

• "How do you prioritize design requests when faced with multiple competing projects and limited resources?" (Demonstrate your project management and prioritization skills.) Company & Culture Questions:

• "What interests you about Monolithic Power Systems and the semiconductor industry? How do you see design impacting our business in this sector?" (Show research into the company and industry, and connect design's strategic value.)

• "How do you approach advocating for user needs and accessibility standards within a technically-driven organization?" (Demonstrate your user-centricity and communication skills.)

• "Describe your experience working in a fast-growing company. What are the unique operational challenges and opportunities?" (Align your experience with the company's growth phase.) Portfolio Presentation Strategy:

• Structure Your Narrative: For each case study, clearly outline the problem, your specific role and approach, the solutions you designed (especially design system elements), the development process, and the measurable outcomes.

• Highlight Design System Contributions: Dedicate specific slides or sections to detail your work on design systems, showing components, style guides, and how they were implemented.

• Showcase Figma Proficiency: Verbally or visually demonstrate advanced Figma techniques you used (e.g., complex component setup, auto layout best practices) and explain their benefits.

• Quantify Your Impact: Use data and metrics wherever possible to demonstrate the success of your designs and systems (e.g., reduction in design/dev time, increase in UI consistency scores, positive user feedback).

• Be Prepared for Technical Deep Dives: Anticipate questions about your understanding of HTML/CSS/JavaScript and how they influence your design decisions.

📝 Enhancement Note: Your interview preparation should strongly emphasize your ability to operationalize design through systems thinking, process implementation, and cross-functional collaboration. Be ready to discuss not just what you designed, but how you designed it to be scalable, efficient, and maintainable, reflecting an operations-minded approach.

📌 Application Steps

To apply for this Sr. User Interface Designer position:

• Submit your application through the provided Workday link: https://monolithicpower.wd12.myworkdayjobs.com/MPS_Careers/job/Kirkland-WA/Sr-User-Interface-Designer_R-1565

• Customize Your Resume: Ensure your resume clearly highlights your 5+ years of experience, expert-level Figma skills, design system development, and collaboration with front-end developers. Use keywords from the job description, such as "design systems," "component libraries," "WCAG," and "responsive web design."

• Curate Your Portfolio: Select 2-3 of your strongest case studies that best demonstrate your expertise in design systems, UI design for web and software, and your collaborative process. Ensure your portfolio is easily navigable and clearly articulates your contributions and the impact of your work.

• Prepare Your Figma Showcase: Be ready to demonstrate your Figma proficiency live or discuss your advanced techniques during the interview. Have examples of well-structured component libraries and auto layout implementations prepared.

• Research MPS: Familiarize yourself with Monolithic Power Systems, Inc., their products, and their position in the semiconductor industry. Understand their commitment to innovation and how your design skills can contribute to their goals.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.