Senior Frontend Engineer

Lucio is looking for a Senior Frontend Engineer to build intuitive, scalable, and high-quality user experiences for its AI-native legal platform. The role involves translating complex AI-driven workflows into clean, reliable interfaces while working closely with Product, Backend, and Design teams to build reusable frontend systems and deliver impactful features.

Responsibilities:

• Build scalable frontend applications using React and modern JavaScript (ES6+).
• Develop reusable UI components and contribute to a design system.
• Implement client-side and server-side state management.
• Build complex forms with validation.
• Optimize frontend performance using techniques like lazy loading, code splitting, memoization, and efficient rendering.
• Collaborate with Product, Backend, and Design teams to deliver end-to-end features.
• Ensure responsive, accessible, and cross-browser compatible applications.
• Write clean, maintainable, and well-documented code.
• Participate in code reviews and frontend architecture discussions.
• Debug and resolve production UI issues while maintaining excellent user experience.

Requirements:

• 5+ years of frontend development experience in production environments.
• Strong proficiency in JavaScript (ES6+).
• Extensive experience with React (Hooks, Lifecycle, Routing, Complex UI).
• Experience with UI libraries/design systems: MUI (Preferred), Ant Design, Chakra UI, Mantine.
• Client-side state management: Redux Toolkit, Zustand.
• Server-state/data fetching: React Query (TanStack Query), SWR, RTK Query.
• Forms and Validation: React Hook Form (Preferred), Zod / Yup.
• Strong knowledge of: CSS3 Responsive Design, Flexbox, CSS Grid.
• Frontend performance optimization.
• Experience with Next.js or Remix (SSR/SSG).
• Tailwind CSS.
• Git and collaborative workflows.
• Strong understanding of HTTP, REST APIs, and browser developer tools.
• Experience with Vite, Webpack, or Parcel.
• Accessibility (WCAG) best practices.
• Ability to thrive in a fast-paced startup with high ownership.