• Design and lead implementation of a frontend and full-stack architectural solutions that guarantee extreme performance, scalability, observability for displaying Ads world wide. • Optimize “Core Web Vitals” metrics, driving significant, measurable improvements in critical user performance metrics (LCP, INP/FID, CLS) for ad rendering and display. • Provide Hands-On Technical Leadership. Serving as the senior technical authority, solving the most complex system challenges, proactively addressing bottlenecks, and ensuring the implementation of the highest coding standards. • Architect and oversee advanced monitoring (RUM and Synthetic) systems to track crucial metrics like reliability, viewability, and latency at massive scale, providing deep debugging insights for ad creation teams. • Establish and evangelize on technical standards, tooling, and deployment methodologies (A/B testing, Canary deployments) across teams, while providing technical mentorship to elevate the skills of other engineers in performance and architecture. • Work intensely with Ads Layouts teams (designers, graphic specialists) and core Bidding Platform backend teams to ensure architectural alignment and optimal data flow for performance.

• Own the creation and iteration of multi-step user experiences • Build and maintain multi-step flows across web and mobile web experiences • Design high-converting layouts with clear hierarchy, strong UX, and trust-building patterns • Implement conditional logic, branching, validation, and edge case handling • Build and maintain reusable components and patterns • Instrument flows with event tracking • Run iteration cycles focused on improving completion rate, conversion rate, and downstream retention • Partner with Design, Growth, Product, Analytics, Engineering, and Clinical stakeholders to ship safely and fast • Use AI daily to accelerate build speed, create variants, and improve quality while verifying correctness

• Lead end-to-end UX design process (research → wireframes → prototypes → high-fidelity designs → usability testing) • Design intuitive and accessible web-based user interfaces • Translate complex workflows into simple, user-friendly experiences • Develop user personas, journey maps, and interaction models • Create design systems and reusable UI component libraries • Collaborate closely with front-end engineers to ensure pixel-perfect implementation • Conduct usability testing and incorporate feedback into iterative design improvements • Ensure compliance with accessibility standards (WCAG) • Optimize UX for performance, scalability, and cross-device responsiveness • Contribute to product strategy with user-centered insights

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more. Role Description - Develop, design, create, modify, and/or test mobile and desktop web software applications or systems. - Architect efficient and reusable front-end systems that drive complex web applications. - Implement features and user interfaces to optimize performance of user-facing products. - Collaborate with Product Designers, Product Managers, and Software Engineers to deliver compelling user-facing products. - Identify and resolve performance and scalability issues. - Work on problems of moderate scope where analysis of situations or data requires a review of a variety of factors. - Exercise judgment within defined procedures and practices to determine appropriate action. - Define requirements for other engineers to implement system components. - Coordinate project progress with user researchers, data scientists, data engineers, and other stakeholders. - Develop internal tooling for other engineers to use, test, and write software efficiently. - Telecommuting from anywhere in the U.S. allowed. Qualifications - Requires a Bachelor's degree (or foreign equivalent) in Computer Science, Engineering, Information Systems, Analytics, Mathematics, Physics, Applied Sciences, or a related field. - Requires completion of a university-level course, research project, internship, or thesis in the following: - Building mobile and desktop web applications using JavaScript, including asynchronous programming, closures, types, and ES6. - HTML or CSS including layout, specificity, cross browser compatibility, and accessibility. - Browser APIs and optimizing front end performance of web-based applications. - Front end development of mobile and desktop applications using React, Vue, or Angular. - Debugging or benchmarking. - Writing code for User Interface components. - Building tools, linting and formatting of the codebase. Requirements - $229,501/year to $250,250/year + bonus + equity + benefits.