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