Burlington, MA

Senior UI/UX Developer Lead

Position Overview

We are seeking a highly skilled, hands-on Senior UI/UX Developer to join our fast-growing team. The ideal candidate brings 7–8 years of experience in building modern, scalable, and high-performing web applications using React.js, JavaScript, and related frontend technologies.

This role is perfect for a builder at heart — someone who enjoys wearing multiple hats, thrives in a dynamic environment, and can take ownership of both technical design and user experience. You will lead UI/UX development efforts, mentor junior engineers, and collaborate closely with product and backend teams to deliver beautiful, functional, and scalable interfaces.

Key Responsibilities

• Lead the end-to-end UI/UX development lifecycle — from concept and design to deployment and optimization.

• Architect, build, and maintain responsive and scalable frontend applications using React.js and similar modern frameworks (e.g., Next.js, Vue.js, Angular).

• Design interactive prototypes and flows using Figma, ensuring seamless user experiences and visual consistency.

• Collaborate with backend teams to integrate RESTful APIs and Node.js services.

• Implement and manage OAuth-based authentication, session management, and secure user workflows.

• Build UI solutions that support multiple form factors (desktop, tablets, iPads, and browsers) and multi-language (i18n) requirements.

• Work on data visualization components including maps, charts, and tables using tools like Recharts, D3.js, ECharts, or Mapbox.

• Ensure high performance, accessibility, and scalability of all frontend components.

• Provide technical leadership and mentor a small development team in best coding and UX practices.

• Stay current with the latest frontend technologies and contribute to the overall technical vision of the product.

Required Skills & Qualifications

• 7–8 years of experience in UI/UX or frontend development roles.

• Advanced proficiency in React.js and JavaScript (ES6+).

• Strong understanding of modern frontend frameworks such as Next.js, Vue.js, or Angular.

• Experience with Figma for UI/UX design, prototyping, and design system creation.

• Strong experience integrating with REST APIs, Node.js, and OAuth-based authentication.

• Expertise in responsive design and multi-form-factor interfaces.

• Hands-on experience with multi-language (i18n) support and localization strategies.

• Familiarity with state management tools (Redux, Zustand, MobX, or Context API).

• Solid understanding of scalable UI architecture and component-driven design.

• Experience developing data visualizations using libraries like Chart.js, D3.js, Recharts, or Mapbox.

• Exposure to UX design principles, usability testing, and performance optimization.

• Strong leadership and team collaboration skills, with prior experience managing or mentoring developers.

• Comfortable working in a fast-paced, startup environment with iterative development cycles.

Nice-to-Have Skills

• Experience with TypeScript, Tailwind CSS, or Material UI.

• Familiarity with Next.js SSR/SSG for performance and SEO optimization.

• Exposure to cloud platforms (AWS, GCP, Azure) and CI/CD pipelines.

• Experience with microfrontend architectures and modular design patterns.

• Understanding of accessibility (WCAG) and design systems.

• Previous startup or product-focused experience.

Education

Bachelor’s or Master’s degree in Computer Science, Information Technology, Human-Computer Interaction, or related field; or equivalent hands-on experience.

This position requires working directly or indirectly with the US Government in restricted environments. Candidates must be U.S. citizens or lawful permanent residents (Green Card holder).

Why Join Us

• Work on cutting-edge technology bridging embedded systems, cloud computing, and AI applications.

• Collaborate with world-class engineers solving complex distributed systems challenges.

• High ownership, fast iteration, and opportunities to lead architecture and innovation initiatives.

• Competitive compensation, equity options, and a culture that values innovation and technical excellence.

Apply Now