Principal UI Developer

This is a fully remote position, open to applicants in Massachusetts.

📋 Description

• Take ownership of the migration strategy for the Appointment Scheduling front-end ecosystem from Angular to React.

• Develop shared component libraries, design tokens, state management patterns, and routing architecture.

• Define strategies for the safe coexistence of Angular and React during the migration process.

• Oversee the visual and interaction language, encompassing the component library, spacing, color, typography, and interaction patterns.

• Manage the design system in Storybook and integrate it with Figma.

• Guarantee that applications comply with WCAG 2.1 AA accessibility standards.

• Enhance interfaces for responsive web, touch-screen kiosks, and branch tablets.

• Design and construct BFF endpoints, Spring Boot routes, and UI data-shaping layers.

• Create REST API contracts that include error-handling and versioning conventions.

• Collaborate with backend engineers on service-layer tasks and API design evaluations.

• Implement caching, optimistic UI, graceful degradation, and real-time event handling using WebSockets or SSE.

• Advocate for test-driven development across unit, component, and end-to-end testing.

• Set and uphold testing standards utilizing Vitest or Jest, React Testing Library, and Playwright or Cypress.

• Lead front-end code reviews with a focus on testability, maintainability, and architectural consistency.

• Leverage AI coding and design tools for scaffolding, migration, test generation, accessibility audits, and design exploration.

• Establish technical direction and document architectural decisions.

• Mentor front-end engineers on React, TypeScript, testing, accessibility, and API integration.

• Collaborate with the Principal PM and Team Lead on defining features and making implementation decisions.

⛳️ Requirements

• Over 8 years of experience in front-end or full-stack web development.

• More than 3 years at a senior or principal individual-contributor level, overseeing front-end architecture for a production application suite.

• Expert-level proficiency in React and TypeScript, including hooks, concurrent features, performance optimization, and state management patterns.

• Hands-on experience in migrating Angular applications to React.

• Strong fluency in Angular across multiple versions.

• Capability and readiness to manage the API layer for front-end features, including BFF patterns, REST endpoint design, and Spring Boot (Java) tasks.

• Genuine design sensibility with the ability to make design decisions independently of a dedicated designer.

• Strong discipline in test-driven development.

• Proficient with React Testing Library, Jest or Vitest, and Playwright or Cypress.

• Solid understanding of WCAG 2.1 AA accessibility standards.

• Practical experience with AI coding and design tools.

• Must be based in the United States.

• Willingness to travel occasionally for team and customer meetings.

• Experience with scheduling, calendar, or real-time availability interfaces is a plus.

• Background in financial services, banking, credit unions, healthcare, or retail technology is advantageous.

• Proficiency in Figma is a plus.

• Experience with Storybook is a plus.

• Familiarity with Micro Frontend architecture or module federation is a plus.

• Experience in kiosk or large-format touch UX is a plus.

🏝️ Benefits

• Flexible remote work arrangement.

• AI tooling support for development, testing, migration, accessibility audits, and design exploration.

• Occasional travel for team and customer meetings.