Principal UI/UX Architect

job summary: Randstad is seeking a visionary Principal UI/UX Architect for our premier client in Washington, D.C. to champion a massive, enterprise-scale digital modernization of their rail transportation systems. In this highly strategic role, you will act as the ultimate bridge between cutting-edge front-end engineering and high-level enterprise architecture, establishing UI governance, evolving design systems, and mentoring engineering teams. By marrying modern user interface standards (Angular, Tailwind CSS, PrimeNG) with robust enterprise frameworks, you will drive a unified, accessible, and high-performance digital ecosystem that solves complex, multi-domain business challenges for a critical transportation leader.

location: Washington, Washington, D.C. job type: Contract salary: $75 - 85 per hour work hours: 9am to 5pm education: Bachelors

responsibilities: Define UI Standards: Define, own, and govern enterprise UI architecture standards, application structures, routing approaches, and design patterns across all web and mobile applications.

Own the Design System: Evolve and manage the enterprise UI design system, including component behavior, variants, states, theming, and shared UI libraries.

Drive Modern CSS & Component Usage: Establish best-in-class responsive design patterns and drive the consistent use of Tailwind CSS integrated with PrimeNG for layout, typography, and spacing.

Translate UX to Code: Translate complex Figma designs into highly reusable, scalable, accessible, and production-ready UI components.

Ensure Accessibility & Performance: Champion UI performance, usability, and strict web accessibility standards (WCAG) across all customer-facing and internal applications.

Establish UI Governance: Implement robust front-end governance practices to prevent divergence and ensure seamless scalability as development teams and application suites grow.

Mentor & Review: Review and guide UI designs and implementations for new features, while mentoring development teams on UI architecture best practices.

Integrate Legacy & Modern Systems: Collaborate with Enterprise Architects to align front-end strategies with modern event-driven architectures (Java/Spring microservices) and legacy mainframe systems (IBM Mainframe & TPF).

qualifications: Experience: 15+ years of broad IT experience, including 10+ years of dedicated technology/software architecture experience.

Domain Expertise: Proven experience designing and implementing large-scale modernization solutions specifically for rail transportation companies is required.

UI/UX Mastery: Deep, hands-on expertise in Angular, TypeScript, HTML, CSS, and enterprise-scale component-based UI architecture.

Styling & Design Systems: Advanced experience with Tailwind CSS, mobile-first design, and integrating Tailwind with PrimeNG or similar component libraries.

Agile Environments: 5+ years of hands-on experience practicing within the SAFe (Scaled Agile Framework) methodology.

Technical Breadth: Well-grounded in architectural modeling, event-driven architectures, and software design principles. Broad familiarity with technologies spanning legacy platforms to modern Java-based microservices is highly preferred.

Enterprise Architecture (Plus): Knowledge of Enterprise Architecture Frameworks and Bodies of Knowledge-such as TOGAF, Business Architecture Guild (BizBok), and DAMA (DMBok)-is a strong plus.

Education: Bachelor’s degree in Computer Science, Information Technology, or equivalent practical experience.

Soft Skills: Exceptional verbal and written communication skills, with a proven ability to influence technical decisions and collaborate with cross-functional stakeholders.

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact HRsupport@randstadusa.com.

Pay offered to a successful candidate will be based on several factors including the candidate’s education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.

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Define UI Standards: Define, own, and govern enterprise UI architecture standards, application structures, routing approaches, and design patterns across all web and mobile applications.

Own the Design System: Evolve and manage the enterprise UI design system, including component behavior, variants, states, theming, and shared UI libraries.

Drive Modern CSS & Component Usage: Establish best-in-class responsive design patterns and drive the consistent use of Tailwind CSS integrated with PrimeNG for layout, typography, and spacing.

Translate UX to Code: Translate complex Figma designs into highly reusable, scalable, accessible, and production-ready UI components.

Ensure Accessibility & Performance: Champion UI performance, usability, and strict web accessibility standards (WCAG) across all customer-facing and internal applications.

Establish UI Governance: Implement robust front-end governance practices to prevent divergence and ensure seamless scalability as development teams and application suites grow.

Mentor & Review: Review and guide UI designs and implementations for new features, while mentoring development teams on UI architecture best practices.

Integrate Legacy & Modern Systems: Collaborate with Enterprise Architects to align front-end strategies with modern event-driven architectures (Java/Spring microservices) and legacy mainframe systems (IBM Mainframe & TPF).

Experience: 15+ years of broad IT experience, including 10+ years of dedicated technology/software architecture experience. Domain Expertise: Proven experience designing and implementing large-scale modernization solutions specifically for rail transportation companies is required. UI/UX Mastery: Deep, hands-on expertise in Angular, TypeScript, HTML, CSS, and enterprise-scale component-based UI architecture. Styling & Design Systems: Advanced experience with Tailwind CSS, mobile-first design, and integrating Tailwind with PrimeNG or similar component libraries. Agile Environments: 5+ years of hands-on experience practicing within the SAFe (Scaled Agile Framework) methodology. Technical Breadth: Well-grounded in architectural modeling, event-driven architectures, and software design principles. Broad familiarity with technologies spanning legacy platforms to modern Java-based microservices is highly preferred. Enterprise Architecture (Plus): Knowledge of Enterprise Architecture Frameworks and Bodies of Knowledge-such as TOGAF, Business Architecture Guild (BizBok), and DAMA (DMBok)-is a strong plus. Education: Bachelor’s degree in Computer Science, Information Technology, or equivalent practical experience. Soft Skills: Exceptional verbal and written communication skills, with a proven ability to influence technical decisions and collaborate with cross-functional stakeholders.

Randstad is seeking a visionary Principal UI/UX Architect for our premier client in Washington, D.C. to champion a massive, enterprise-scale digital modernization of their rail transportation systems. In this highly strategic role, you will act as the ultimate bridge between cutting-edge front-end engineering and high-level enterprise architecture, establishing UI governance, evolving design systems, and mentoring engineering teams. By marrying modern user interface standards (Angular, Tailwind CSS, PrimeNG) with robust enterprise frameworks, you will drive a unified, accessible, and high-performance digital ecosystem that solves complex, multi-domain business challenges for a critical transportation leader.