Lead Full Stack UI Engineer

Overview - Lead Full Stack UI Engineer We are seeking a hands-on, collaborative Lead Full Stack UI Engineer to drive the technical direction, architecture, and delivery of user-facing application interfaces. As Lead Full Stack UI Engineer, you will provide technical leadership and guidance to the UI team, ensuring the delivery of robust, scalable, modular, high-performance, and intuitive end-to-end solutions for our agentic platform. This role partners closely with UX, product, and backend teams.Our core UI tech stack includes:• Frontend & Design System▪ React + TypeScript (with Next.js) for building user interfaces.▪ Storybook for our design system and component library.• Backend & APIs▪ TypeScript with NestJS for building backend services and integrating with REST and gRPC APIs.• Testing▪ Jest and Playwright for unit and end-to-end testing.▪ Karate for API testing.Key Responsibilities• Provide technical leadership, mentorship, and guidance to the UI engineering team• Lead the design, implementation, and evolution of the design system, component library, UI architecture, and supporting backend services• Ensure delivery of high-performance, responsive, and accessible user interfaces• Architect and integrate APIs and backend services to support UI requirements• Drive adoption of best practices in frontend engineering, including component standardization, security integration, and progressive loading• Champion user-centered design and usability in partnership with UX and product teams• Oversee integration of agentic and real-time features into the UI• Guide the use of AI-assisted development tools and modern frontend and backend frameworks, architectural patterns, scaffolding approaches, and libraries• Own the implementation and quality of Web Analytics and Behavioral Analytics to enable continuous improvement and evolution of our products• Collaborate with the Developer Experience (DX) Lead to automate and streamline common engineering tasks• Ensure engineering rigor, code quality, and documentation standards are met across the stack• Facilitate clear communication, knowledge sharing, and effective documentation within the team • Support team growth through coaching, feedback, and skills development• Drive development efficiency and alignment with product team priorities through clear prioritization frameworks and delivery metricsCore Qualities & Skills• Proven experience leading full stack or frontend engineering teams and delivering complex user-facing projects• Deep expertise in React, TypeScript and Node.js technologies.• Experience with design systems, component libraries, and UI performance optimization• Experience designing, building, and integrating RESTful or GraphQL APIs• Strong understanding of accessibility, cross-browser compatibility, and responsive design• Strong collaboration and alignment skills across disciplines• Willingness to learn, share knowledge, and adapt to evolving technologies• System design skills and awareness of technical debt and tradeoffs across the stack• Excellent communication, documentation, and stakeholder management abilities• Comfort with ambiguity, discovery, and rapid change• Commitment to engineering excellence, security, and responsible practices (including OAuth 2.0, Authorization, Authentication, Chain-of-custody, Claims management, and Principle of Least Privilege (POLP))Preferred Qualifications• 5+ years of hands-on full stack or frontend engineering experience, with 2+ years in a technical leadership role• Track record of architecting and delivering scalable, reliable end-to-end systems• Experience with modern development practices (CI/CD, automated testing, code reviews)• Demonstrated ability to mentor and grow engineers• Experience working in cross-functional, agile teams