Principal Software Engineer, Ads Platform Frontend

Working across multiple engineering teams, you will drive technical solutions that improve platform scalability, web performance, development efficiency, and user experience. Drive technical solutions that improve platform scalability, performance, reliability, maintainability, and engineering efficiency. Partner with engineering, product, and design teams to deliver innovative customer experiences and solve complex technical challenges. Influence architectural direction across multiple teams through technical expertise, collaboration, and solid engineering judgment. Design and evolve shared platform capabilities, frameworks, and development patterns that enable teams to build and deliver products more effectively. Advance AI-enabled engineering practices that improve developer productivity, accelerate innovation, and enhance software quality. Lead technical investigations, architecture reviews, and design discussions for business-critical initiatives and platform investments. Drive improvements in frontend architecture, performance, accessibility, observability, and engineering excellence across the platform. Mentor and collaborate with engineers across teams, sharing knowledge and raising the overall technical bar of the organization. Contribute to long-term technical strategy and identify opportunities to modernize systems, reduce complexity, and improve customer outcomes. Bachelor's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python These requirements include but are not limited to the following specialized security screenings: Master's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 15+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. Experience designing, building, and operating large-scale customer-facing software systems. Experience leading architecture and technical execution across multiple teams or product areas. Experience with modern web application development and frontend architecture, including React, TypeScript, and JavaScript. Experience driving technical alignment and influencing engineering decisions across cross-functional teams. Experience delivering software throughout the full development lifecycle, from design and implementation to deployment and operations. Experience building platform capabilities, shared frameworks, design systems, or developer productivity solutions. Experience applying AI-assisted engineering practices and modern development tools to improve engineering efficiency and software quality. Experience in online advertising, e-commerce, SaaS, or other large-scale customer-facing platforms.