Principal UI Developer

📍 Job Overview

Job Title: Principal UI Developer

Company: Engageware

Location: Boston, Massachusetts, United States

Job Type: Full-Time

Category: Software Engineering / Front-End Development

Date Posted: 2026-08-06

Experience Level: 8+ years (Senior/Principal IC)

Remote Status: Remote OK (within the United States)

🚀 Role Summary

• Lead the strategic migration of Engageware's Appointment Scheduling platform front-end from Angular to React, establishing a modern, scalable architecture.

• Own the end-to-end development lifecycle for UI features, including API layer design and implementation, ensuring seamless integration.

• Champion a robust design system and interface quality, ensuring adherence to WCAG 2.1 AA accessibility standards and optimizing for diverse deployment surfaces (web, kiosks, tablets).

• Drive a strong test-driven development culture, implementing comprehensive unit, component, and end-to-end testing strategies.

• Leverage AI-augmented development tools and patterns to accelerate development, enhance quality, and explore design directions rapidly.

📝 Enhancement Note: This role is positioned as a Principal Individual Contributor (IC) with significant architectural and strategic ownership over the front-end development of a critical platform. The emphasis on AI tooling suggests a forward-thinking engineering culture aiming to boost productivity and innovation.

📈 Primary Responsibilities

• Define and execute the migration strategy for the Appointment Scheduling platform's front-end estate, transitioning existing Angular applications to a React foundation.

• Architect and implement a comprehensive design system, including a shared component library, design tokens, state management patterns (React Query, Zustand, Redux Toolkit), and routing architecture.

• Own the development of UI-adjacent API endpoints (BFF patterns, lightweight Spring Boot services) to shape data and fulfill front-end requirements efficiently.

• Ensure all user interfaces meet WCAG 2.1 AA accessibility standards and are optimized for various deployment environments, including responsive web, touch-screen kiosks, and staff-facing tablets.

• Establish and enforce rigorous testing standards using Vitest/Jest, React Testing Library, and Playwright/Cypress, promoting test-driven development (TDD) across the team.

• Lead front-end code reviews, focusing on maintainability, architectural consistency, testability, and performance.

• Mentor and guide other front-end engineers on best practices in React, TypeScript, testing methodologies, accessibility, and API integration.

• Collaborate closely with Product Management and Team Leads to influence product direction, assess technical feasibility, and identify UX/implementation considerations early in the development cycle.

• Integrate and promote the use of AI-augmented development tools (coding agents, design tools) within the team's workflow, establishing quality guardrails and best practices.

• Document architectural decisions and technical standards to ensure consistent development practices across the team.

📝 Enhancement Note: The responsibilities highlight a blend of deep technical expertise in front-end development, architectural leadership, and a proactive approach to leveraging emerging technologies like AI. The expectation to own API layers indicates a full-stack capability requirement for UI-adjacent services.

🎓 Skills & Qualifications

Education: While no specific degree is listed, a Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience, is generally expected for a Principal-level role.

Experience:

• 8+ years in front-end or full-stack web development.

• 3+ years in a senior or principal Individual Contributor (IC) role, with demonstrated ownership of front-end architecture for a production application suite.

• Proven experience migrating production applications from Angular to React. Required Skills:

• Expert-level proficiency in React and TypeScript, including hooks, concurrent features, performance optimization, and common state management patterns (e.g., React Query, Zustand, Redux Toolkit).

• Strong fluency in Angular (multiple versions) for understanding and migrating existing codebases.

• Demonstrated ability to own and develop API layers for front-end features, including BFF patterns, REST endpoint design, and light service development (e.g., Spring Boot).

• Genuine design sensibility and ability to make pragmatic design decisions in the absence of dedicated design resources.

• Rigorous test-driven development (TDD) discipline, with tests developed alongside code.

• Proficiency with testing frameworks: React Testing Library, Jest or Vitest.

• Proficiency with end-to-end testing frameworks: Playwright or Cypress.

• Solid understanding and practical application of WCAG 2.1 AA accessibility standards.

• Hands-on experience utilizing AI coding and design tools (e.g., Claude, v0, Figma AI) as a genuine productivity multiplier.

• Experience working within the United States, with a willingness to travel occasionally. Preferred Skills:

• Experience building scheduling, calendar, or real-time availability interfaces.

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

• Figma proficiency, including the ability to create and maintain component libraries and design tokens.

• Experience with Storybook for component documentation and testing.

• Familiarity with Micro Frontend architecture or module federation.

• Depth in kiosk or large-format touch user experience (UX) design and implementation.

📝 Enhancement Note: The experience requirements emphasize a strong track record in modern front-end frameworks, coupled with practical experience in legacy system migration and full-stack capabilities for UI-adjacent services. The inclusion of AI tools as a "must-have" signifies their integral role in the development process.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrations of complex front-end application architecture, particularly showcasing migration strategies from older frameworks (like Angular) to modern ones (like React).

• Case studies detailing end-to-end feature ownership, including examples of API design, data shaping, and integration with backend services.

• Examples of well-defined and implemented design systems, component libraries, and adherence to design tokens and accessibility standards (WCAG 2.1 AA).

• Proof of robust testing strategies, including unit, component, and end-to-end tests, ideally showcasing TDD practices.

• Projects that highlight the effective use of AI-augmented development tools to improve efficiency, quality, or design exploration. Process Documentation:

• Showcase how you document architectural decisions, migration plans, and design system standards to ensure team consistency and knowledge sharing.

• Provide examples of how you establish and enforce coding standards, testing protocols, and quality gates, especially when integrating AI-generated code.

• Illustrate your approach to API contract design, error handling conventions, and versioning for front-end services.

• Demonstrate your understanding of incremental migration patterns (e.g., strangler-fig) and how you manage co-existence of different frameworks during transitions.

📝 Enhancement Note: A strong portfolio for this role will need to showcase not just technical skills but also architectural vision, process discipline, and adaptability to new development paradigms like AI-assisted coding. The ability to demonstrate tangible improvements through migration and AI integration will be key.

💵 Compensation & Benefits

Salary Range: Given the Principal UI Developer title, 8+ years of experience, and location in Boston, MA, a competitive salary range is expected. Based on industry benchmarks for senior/principal front-end engineers in major US tech hubs, the estimated annual salary range is $160,000 - $220,000 USD. This range can vary based on the candidate's specific experience, interview performance, and the company's compensation philosophy.

Benefits:

• Comprehensive health, dental, and vision insurance.

• Retirement savings plan (e.g., 401(k)) with potential company match.

• Paid time off (PTO), including vacation, sick leave, and holidays.

• Professional development opportunities, including training, conferences, and certifications.

• Potential for stock options or performance-based bonuses.

• Access to cutting-edge AI development tools and platforms.

• Opportunities for occasional travel for team and customer meetings.

Working Hours: The standard full-time workweek is 40 hours. Engageware likely offers flexibility in daily scheduling, accommodating remote work arrangements, with core hours for team collaboration.

📝 Enhancement Note: Salary estimation is based on data from reputable compensation sites (e.g., Glassdoor, Levels.fyi, LinkedIn Salary) for Principal UI Developers in Boston, MA, considering the required experience level and the use of advanced technologies like AI. Benefits are typical for a full-time position at a US-based tech company.

🎯 Team & Company Context

🏢 Company Culture

Industry: Engageware operates within the Software and Technology sector, specifically focusing on enterprise software solutions for financial services (banks, credit unions) and healthcare organizations. Their products are designed to enhance customer engagement through appointment scheduling, branch management, and virtual communication tools.

Company Size: Engageware is likely a mid-sized to large tech company, indicated by the presence of a dedicated HR/careers portal (BambooHR) and the scope of the product suite described. A company of this nature typically fosters a culture that balances structured processes with opportunities for innovation.

Founded: Engageware was founded in 1991, giving it a long history and established presence in the market. This longevity suggests stability and a deep understanding of customer needs within their target industries.

Team Structure:

• The Appointment Scheduling platform team is likely composed of engineers, product managers, and potentially QA specialists, working in a cross-functional manner.

• As a Principal UI Developer, this role will report into a Team Lead or Engineering Manager and will work closely with a Principal Product Manager.

• Collaboration is expected across backend engineering teams (Spring Boot, Scala/Akka) and potentially with QA and DevOps/Infrastructure teams. Methodology:

• Engageware appears to follow a modern software development lifecycle, emphasizing agile methodologies, test-driven development, and the integration of AI tools to enhance productivity and quality.

• The migration from Angular to React suggests a commitment to modernizing their tech stack and improving developer experience and application performance.

• The focus on enterprise-scale applications implies a need for robust, secure, and reliable development practices.

Company Website: https://www.engageware.com/

📝 Enhancement Note: The company's long history combined with its adoption of modern technologies like React and AI suggests a company that values both stability and innovation. The focus on regulated industries like banking and healthcare implies a strong emphasis on security, compliance, and user experience quality.

📈 Career & Growth Analysis

Operations Career Level: This role is at the Principal Individual Contributor (IC) level. This signifies a senior technical leader responsible for setting technical direction, architectural vision, and mentoring other engineers. It's a role focused on deep technical impact and influence rather than people management.

Reporting Structure: The Principal UI Developer will likely report to a Director of Engineering or a specific Team Lead for the Appointment Scheduling platform. They will collaborate closely with Product Management, other engineering leads, and potentially architects.

Operations Impact: This role has a direct impact on the customer-facing applications that serve as the "front door" for customer interactions within leading banks, credit unions, and healthcare organizations. Successful migration to React, implementation of a robust design system, and end-to-end feature ownership will directly influence user experience, platform stability, developer productivity, and the company's ability to innovate and meet market demands. The adoption of AI tooling also positions the company and its employees at the forefront of modern development practices.

Growth Opportunities:

• Technical Specialization: Deepen expertise in React, front-end architecture, AI-augmented development patterns, and potentially micro-frontend architectures.

• Architectural Leadership: Continue to shape and evolve the front-end architecture for Engageware's product suite, influencing technical strategy across multiple teams.

• Mentorship & Influence: Grow as a technical mentor, guiding junior and senior engineers, and acting as a subject matter expert within the organization.

• Cross-Functional Impact: Gain broader exposure to backend systems, product strategy, and customer needs within the financial and healthcare sectors.

• Emerging Technology Adoption: Become a leader in implementing and advocating for new technologies, particularly AI, within the engineering organization.

📝 Enhancement Note: The Principal IC path offers significant technical growth and influence without the pressures of direct people management, making it attractive for deeply technical individuals. The emphasis on AI and platform modernization suggests opportunities to work on cutting-edge initiatives.

🌐 Work Environment

Office Type: While the role is "Remote OK" within the United States, Engageware has a physical presence, likely including offices for collaboration. The mention of occasional travel for team and customer meetings suggests a hybrid or in-person component is possible for certain events.

Office Location(s): The primary office location is Boston, Massachusetts. Other locations might exist, but Boston is the specified hub.

Workspace Context:

• Collaborative Environment: The role requires close collaboration with Product Management, Team Leads, and other engineers, necessitating strong communication skills and participation in virtual or occasional in-person meetings.

• Tools & Technology: Access to modern development tools, including an integrated AI development environment, design tools (Figma), and collaboration platforms.

• Team Interaction: Regular interaction with a dedicated Appointment Scheduling platform team, fostering a focused and specialized work environment. The Principal UI Developer will be a key technical voice within this team.

Work Schedule: Standard 40-hour workweek with flexibility. Given the remote aspect and the nature of development work, asynchronous communication and flexible scheduling are likely encouraged, balanced with synchronous meetings for critical collaboration. The focus is on delivering results rather than strict adherence to office hours.

📝 Enhancement Note: The "Remote OK" status within the US, combined with the Boston headquarters, indicates flexibility for candidates outside of Boston. The need for occasional travel suggests that while remote, some on-site engagement might be expected for key strategic meetings or team events.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will likely conduct a brief call to assess basic qualifications, interest, and cultural fit.

• Technical Phone Screen: Expect a technical interview focusing on core front-end concepts, React, TypeScript, and potentially algorithmic problem-solving.

• Portfolio Review & Architectural Deep Dive: A session where you present your portfolio, discuss specific projects in detail, and walk through your thought process on architecture, migration, and challenges. This is where your understanding of TDD, accessibility, and AI integration will be heavily scrutinized.

• System Design / Migration Challenge: You might be given a problem to design a solution for, or a scenario to outline a migration strategy, potentially involving API design or component architecture. This could be a take-home assignment or an in-depth whiteboard session.

• Team/Manager Interviews: Meetings with potential peers and the hiring manager to assess team fit, collaboration style, leadership potential, and broader technical acumen.

• Final Round: This could involve senior leadership or a final architectural discussion to confirm suitability for the Principal IC role.

Portfolio Review Tips:

• Curate Strategically: Select 3-4 of your most impactful projects that directly demonstrate the required skills: Angular-to-React migration, complex React applications, robust testing, API integration, and ideally, AI tool usage.

• Quantify Impact: For each project, clearly articulate the problem, your solution, the technologies used, and the measurable outcomes (e.g., performance improvements, reduction in bugs, efficiency gains, successful migration completion).

• Architectural Focus: Be prepared to deep-dive into architectural decisions, trade-offs considered, and the reasoning behind your choices, especially concerning migration strategies and design system implementation.

• Show, Don't Just Tell: Use live demos or detailed screenshots/walkthroughs. For AI tools, show examples of code generated, design explorations, or tests created, and explain how you validated and refined the AI's output.

• Address Challenges: Be ready to discuss challenges faced, how you overcame them, and lessons learned, particularly regarding the complexities of migrating legacy systems or integrating new technologies.

Challenge Preparation:

• Angular to React Migration: Practice outlining a phased migration strategy, including identifying common patterns, potential pitfalls, and how to manage co-existence of both frameworks.

• Design System & Accessibility: Be ready to discuss how you would design a scalable component library and ensure WCAG 2.1 AA compliance from the ground up.

• API Layer Design: Prepare to design simple RESTful API endpoints for a given UI feature, considering request/response structures, error handling, and data transformation.

• AI Integration: Think about how you would integrate AI coding assistants into a team workflow, focusing on quality control, code review, and ethical considerations.

📝 Enhancement Note: The emphasis on portfolio review and specific challenges indicates that Engageware values practical demonstration of skills and strategic thinking, especially concerning complex migrations and the adoption of new technologies like AI.

🛠 Tools & Technology Stack

Primary Tools:

• Frontend (Target): React with TypeScript. Proficiency in hooks, concurrent features, performance optimization, and state management libraries (React Query, Zustand, Redux Toolkit) is critical.

• Frontend (Migration Source): Angular (multiple versions). Ability to read, understand, and migrate existing Angular codebases is a must.

• Testing Frameworks: Jest or Vitest for unit/component testing, React Testing Library for component interaction testing, and Playwright or Cypress for end-to-end testing.

• Design & Documentation: Figma for design work and component library creation, and Storybook for component documentation, isolation, and testing.

• AI Development Tools: Coding agents (built on Claude models), AI design tools (v0, Figma AI), and familiarity with agentic development patterns (e.g., MCP-based tooling).

Analytics & Reporting: While not explicitly detailed for front-end, expect integration with application performance monitoring (APM) tools and analytics platforms to track user behavior and application health.

CRM & Automation: Not directly relevant to the UI Developer role, but understanding how the front-end integrates with backend systems that might interact with CRMs or automation platforms is beneficial.

API Layer & Backend Technologies:

• API Design: RESTful API contracts.

• Backend (UI-Adjacent): Spring Boot (Java 17) for lightweight BFF services.

• Backend Services: Scala/Akka services.

• Data: SQL Server and PostgreSQL.

• Infrastructure: Kubernetes on AWS.

📝 Enhancement Note: The stack highlights a modern front-end stack (React, TypeScript) being adopted, with a clear path for migration from a legacy Angular codebase. The integration of AI tools is a significant differentiator and a key requirement. Familiarity with the backend technologies is important for effective full-stack UI development.

👥 Team Culture & Values

Operations Values:

• Innovation & Modernization: A commitment to adopting new technologies and modernizing the tech stack (e.g., migrating to React, leveraging AI) to improve efficiency and product quality.

• Quality & Reliability: A strong emphasis on delivering robust, accessible, and well-tested software, especially critical for enterprise clients in regulated industries.

• Customer Focus: Building solutions that serve as the "front door" to customer interactions, requiring a deep understanding of user needs and business objectives.

• Efficiency & Productivity: Utilizing tools and methodologies (like TDD, AI-augmented development) to maximize developer output and streamline processes.

• Collaboration & Mentorship: Fostering an environment where team members support each other, share knowledge, and contribute to collective growth.

Collaboration Style:

• Cross-functional Integration: Close partnership with Product Management and backend engineering teams to ensure alignment on features, architecture, and timelines.

• Data-Driven Decision Making: Using insights from testing, user feedback, and performance metrics to inform development choices and process improvements.

• Continuous Improvement: An open approach to feedback, code reviews, and process adjustments to enhance team performance and product quality.

• Proactive Communication: Encouraging clear and timely communication, especially in a remote-first environment, to keep stakeholders informed and unblock development.

📝 Enhancement Note: The culture appears to value technical excellence, forward-thinking adoption of technology, and a collaborative approach to problem-solving, particularly in the context of complex enterprise software development.

⚡ Challenges & Growth Opportunities

Challenges:

• Angular to React Migration Complexity: Managing the coexistence of Angular and React during a large-scale migration, ensuring compatibility, and minimizing disruption for existing enterprise customers.

• Balancing Innovation with Stability: Integrating new technologies like AI while maintaining the high standards of reliability and security required by banking and healthcare clients.

• Owning the API Layer: Effectively designing and implementing UI-adjacent backend services requires a broader full-stack skill set and coordination with backend teams.

• Diverse Deployment Surfaces: Optimizing UI/UX for vastly different environments like responsive web, constrained kiosk screens, and touch-enabled tablets.

• Keeping Pace with AI Evolution: Continuously learning and adapting to the rapidly evolving landscape of AI development tools and methodologies.

Learning & Development Opportunities:

• Advanced React & TypeScript: Deepen expertise in modern React features, performance optimization techniques, and advanced TypeScript patterns.

• AI Development Mastery: Become a proficient user and advocate for AI-augmented development, exploring agentic workflows and advanced AI capabilities.

• Architectural Leadership: Develop skills in defining and scaling front-end architectures for complex, multi-application platforms.

• Domain Expertise: Gain in-depth knowledge of the financial services and healthcare technology sectors, understanding their unique requirements and regulatory landscapes.

• Mentorship Skills: Hone leadership abilities through guiding and mentoring junior and senior engineers, contributing to their technical growth.

📝 Enhancement Note: This role presents significant technical challenges that are also excellent opportunities for professional growth, particularly in the areas of large-scale application migration, full-stack development, and cutting-edge AI integration.

💡 Interview Preparation

Strategy Questions:

• Technical Strategy: "Describe your approach to migrating a large Angular application suite to React. What are the key phases, potential risks, and how would you ensure a smooth transition for enterprise clients?"

• Architectural Vision: "How would you design a scalable and maintainable design system for a platform with diverse user interfaces (web, kiosk, tablet)? What are your principles for component reusability and accessibility?"

• AI Integration: "How do you see AI tools like Claude or v0 changing the way front-end development is done? What are the best practices for integrating AI-generated code into a production workflow, and what guardrails would you put in place?"

• Full-Stack UI: "When a UI feature requires backend support, how do you approach designing and implementing the necessary API endpoints and lightweight services? Can you walk through an example?"

• Quality & Testing: "What is your philosophy on test-driven development, and how would you implement a robust testing strategy across unit, component, and end-to-end tests for a complex application?"

Company & Culture Questions:

• "What interests you about Engageware and our mission within the financial and healthcare sectors?"

• "How do you approach collaboration with Product Managers and backend engineers, especially in a remote setting?"

• "Describe a time you had to influence technical decisions or introduce a new technology to a team. What was the outcome?"

• "How do you stay current with the latest trends in front-end development and AI?" Portfolio Presentation Strategy:

• Narrative Arc: For each project, tell a clear story: the problem, your role and approach, the technical solutions (especially migration/AI aspects), and the quantifiable results.

• Architectural Deep Dive: Be prepared to draw diagrams, explain trade-offs, and discuss the long-term implications of your architectural choices.

• Demonstrate AI Usage: Show concrete examples of AI-assisted code generation, design exploration, or test creation. Explain how you used it, why it was beneficial, and how you ensured quality.

• Focus on Impact: Quantify achievements whenever possible (e.g., "reduced load times by X%", "increased test coverage to Y%", "accelerated feature delivery by Z%").

• Address Challenges Openly: Discuss difficulties encountered and how you navigated them, showcasing problem-solving skills and resilience.

📝 Enhancement Note: Interview preparation should heavily emphasize architectural thinking, practical migration experience, and a deep understanding of how to leverage AI tools effectively and responsibly in a professional development context.

📌 Application Steps

To apply for this Principal UI Developer position:

• Submit your application through the provided link on Engageware's careers portal.

• Curate Your Portfolio: Select 3-4 projects that best showcase your expertise in React, TypeScript, Angular migration, API layer development, and AI-augmented development. Ensure each project clearly outlines the problem, your solution, technologies used, and measurable impact.

• Tailor Your Resume: Highlight your 8+ years of experience, specifically mentioning your senior/principal IC roles, Angular-to-React migration projects, and proficiency with TDD, accessibility, and AI tools. Use keywords from the job description.

• Prepare for Technical & Architectural Discussions: Practice articulating your thought process for architectural decisions, migration strategies, and problem-solving. Be ready to discuss specific examples from your portfolio and how you've used AI tools.

• Research Engageware: Understand their products, target industries (banking, healthcare), and company values. This will help you tailor your responses and demonstrate genuine interest during interviews.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.