Senior UI Developer

Perficient•Town and Country, MO

7d•$92,700 - $120,500•Remote

About The Position

We currently have a career opportunity for a Senior UI Developer to join our team located within the continental United States. As a Senior Technical Consultant you will participate in all aspects of the software development lifecycle which includes estimating, technical design, implementation, documentation, testing, deployment and support of application developed for our clients. As a member working in a team environment you will take direction from solution architects and Leads on development activities.

Requirements

5+ years of front-end engineering
3+ years of hands-on React (18+) with TypeScript
Working knowledge of Angular
Strong JavaScript, HTML and CSS: DOM, responsive layout, cross-browser
Has built a shared component library or design system that other teams used
React MUI, including theming and style overrides
Design tokens and multi-theme styling
Storybook
WCAG 2.1 AA accessibility in practice
Automated unit, integration and end-to-end testing
CI/CD and Git-based workflows
Daily use of AI coding tools (Claude Code, GitHub Copilot or Codex), including writing good prompts and repo instruction files
Bachelor's in Computer Science or equivalent experience

Nice To Haves

Micro-frontend architecture with Nx and Module Federation
Web components or Lit
Publishing npm packages with semantic versioning
Visual regression testing at scale
GraphQL
Okta or another enterprise identity provider
Major framework upgrades in a library used by several products
Healthcare or other regulated industries (HIPAA, SOC 2)

Responsibilities

Build and maintain micro-product UIs in React (Angular where needed) that mount into a shared shell
Build micro-frontends using Nx and Module Federation, including more than one framework on the same page
Build reusable components with React MUI (and Angular Material), working from the UX team's Figma designs
Use and extend the shared design token layer so products pick up brand changes without rework
Design component APIs other teams can rely on, and own versioning and migration notes for breaking changes
Integrate with Okta (OAuth2/OIDC, JWT) across the shell and products, and with REST and GraphQL services
Write automated tests: Jest for unit tests, Playwright or Cypress for end-to-end, plus visual regression
Document components in Storybook
Build to WCAG 2.1 AA: keyboard navigation, screen reader support, focus management
Maintain CI/CD pipelines in Azure DevOps and GitHub Actions, with quality gates
Turn requirements into technical designs and implementation plans, using AI-assisted tools throughout
Mentor engineers and lead code reviews