Senior UX Engineer: Prototyping & Design Systems

Paylocity; Massachusetts; Hybrid; USD 110,000 - 150,000; Full time

Job summary

Aptima is seeking a UX Engineer to shape high-quality, intuitive front-end experiences for production web applications. You will collaborate with UX Researchers, Designers, and Engineers to define features, prototype iteratively, and evolve design systems.

You will translate concepts into reusable UI components, ensure accessibility, and contribute to scalable engineering practices across products and customer environments.

Qualifications

• Bachelor’s degree in a relevant technical or STEM field is required.
• Experience with modern front-end development tools and frameworks (React, Angular, TypeScript, HTML, CSS).
• Demonstrated ability to design and produce clear UX design deliverables.
• Experience creating and implementing design systems and scalable UI components.
• Strong background in prototyping and customer-facing collaboration.
• Portfolio demonstrating design capability and front-end engineering experience.
• GitHub or other public repository with representative front-end code samples.
• Willingness to travel when necessary.
• Eligibility for a U.S. Security Clearance is required.

Responsibilities

• Front-End Application Development: Develop modern front-end applications using React, Angular, TypeScript; build responsive, accessible UI components that scale across products.
• UX Engineering & Prototyping: Design and implement user-friendly features, create, extend, and maintain design systems and scalable UI libraries.
• Collaboration & Cross-Functional Work: Work with UX Researchers, Designers, and customers to define features and translate design to code.
• Software Engineering Practices: Develop production-grade front-end software, debugging, and maintaining quality standards.
• Typical Functions: Apply user research and UI design to create products and features; test, refine prototypes and production code.

Skills

UX design

Prototyping

Customer collaboration

Portfolio development

Education

Bachelor's degree in a relevant technical or STEM field

Tools

React

Angular

TypeScript

HTML

CSS

Job description

Aptima is seeking a UX Engineer to shape high-quality, intuitive front-end experiences for production web applications. You will collaborate with UX Researchers, Designers, and Engineers to define features, prototype iteratively, and evolve design systems.

You will translate concepts into reusable UI components, ensure accessibility, and contribute to scalable engineering practices across products and customer environments.