Senior Front-End UI/UX Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Front-End UI/UX Engineer based in Netherlands.

• Design, develop, enhance, and maintain accessible, user-centered interfaces for complex enterprise applications built on ASP.NET MVC 5.
• Translate business requirements, user needs, and design concepts into clean, intuitive, maintainable, and production-ready front-end experiences.
• Apply UI/UX principles including information architecture, interaction design, visual hierarchy, usability, and responsive design to real-world applications.
• Implement and validate web accessibility in accordance with WCAG 2.1/2.2 AA and Section 508 requirements.
• Apply semantic HTML, ARIA roles and attributes, keyboard navigation, focus management, and other accessibility best practices.
• Test interfaces using assistive technologies and screen readers such as JAWS, NVDA, and VoiceOver, as appropriate.
• Develop and support full-stack .NET applications using C#, ASP.NET MVC 5, SQL Server, and related Microsoft technologies in a Windows environment.
• Build and integrate front-end experiences with RESTful APIs and internal or external systems.
• Work with Microsoft SQL Server, including data models, T-SQL queries, stored procedures, and views required to support application functionality.
• Prepare technical design specifications, technical documentation, and clear design documentation.
• Write and maintain unit tests while supporting QA, usability testing, accessibility validation, and release activities.
• Analyze requirements, troubleshoot complex UI and cross-browser issues, and deliver stable, polished solutions within established timelines.
• Collaborate with business stakeholders, customers, designers, and cross-functional technology teams to validate solutions and resolve issues.
• Contribute to design reviews, accessibility audits, usability initiatives, and continuous improvements to the application's user experience.
• Work independently within established enterprise codebases while identifying opportunities to modernize and improve legacy front-end components.

• Bachelor’s degree in Computer Science, Human-Computer Interaction, Design, Engineering, or a related field, or equivalent practical experience.
• 5–8+ years of professional software development experience, with significant hands-on experience in front-end and UI development.
• Strong proficiency in HTML5, CSS3, JavaScript, and jQuery, with a focus on clean, semantic, maintainable markup.
• Demonstrated ability to apply UI/UX principles such as information architecture, interaction design, visual hierarchy, usability, and user-centered design.
• Hands-on experience implementing and testing accessible web experiences against WCAG 2.1/2.2 AA and Section 508 standards.
• Practical knowledge of ARIA, semantic HTML, keyboard navigation, focus management, and accessibility testing with assistive technologies.
• Strong proficiency in C# and ASP.NET MVC 5, with experience developing and supporting full-stack .NET applications in Windows environments.
• Solid Microsoft SQL Server experience, including database design, data modeling, T-SQL queries, stored procedures, and views.
• Strong understanding of object-oriented programming, design patterns, core computer science principles, and software engineering best practices.
• Experience building and consuming RESTful APIs and integrating front-end applications with internal and external systems.
• Experience with unit testing, QA collaboration, usability testing, release processes, and the broader software development lifecycle.
• Ability to analyze complex requirements, troubleshoot cross-browser and UI issues, and deliver reliable, high-quality solutions with minimal supervision.
• Strong written and verbal communication skills, with the ability to collaborate effectively with both technical and non-technical stakeholders and advocate for users and accessibility.
• Experience with DevExpress UI components and reporting tools is preferred.
• Formal training or certification in UX, accessibility, human-centered design, or credentials such as IAAP CPACC/WAS is an advantage.
• Experience supporting usability testing, accessibility audits, design reviews, or design-to-development workflows is a plus.
• Familiarity with Figma, Adobe XD, or similar design and prototyping tools is beneficial.
• Experience with financial aid, student information systems, higher-education data, or related enterprise applications is desirable.
• Familiarity with Agile/Scrum methodologies, Git, CI/CD pipelines, automated deployments, and legacy .NET modernization is advantageous.

• Opportunity to work on complex enterprise applications with a strong focus on user experience and accessibility.
• Hands-on exposure to front-end engineering, UI/UX design, accessibility, and full-stack .NET development.
• Opportunity to influence the usability and inclusivity of business applications.