Our Opportunity: Chewy is seeking a Senior Software Developer – Full Stack to join our fast-paced, customer-first Sponsored Ads team. This role is instrumental in launching innovative, customer-facing products composed to delight and engage Chewy’s advertising partners, while scaling our advertising technology and strengthening brand partnerships. As a senior member of the team, you’ll help compose, build, and deliver intuitive, performant, and scalable front-end experiences that power ad creation, campaign management, creative tools, and performance reporting across Chewy’s digital ecosystem. Sponsored Ads at Chewy builds an outcome where everybody wins ecosystem—offering pet parents relevant product options and deals while enabling brand partners to improve visibility and reach through targeted placements. Advertising is a fast-growing, strategically important component of Chewy’s e-commerce platform and a key driver of incremental revenue. In this role, you’ll use your deep expertise in front-end engineering to lead the development of engaging web experiences for both advertisers and internal users. As an early member of the team, you’ll be part of crafting the technical strategy, owning core areas of the system architecture, and influencing the user experience across Chewy’s retail platform and advertiser portal. You will also help lead the team through ambiguous technical decisions and play a critical role in establishing front-end engineering standards. This is an outstanding opportunity to spearhead a new initiative from the ground up, driving business outcomes in a rapidly growing segment of the company. What You'll Do: Serve as a senior technical contributor on the Sponsored Ads engineering team, focused on front-end architecture and implementation. Own and lead design, development, testing, and deployment of high-quality front-end applications and features! Work closely with Product, UX, and Back-End Engineering to build seamless, performant, and accessible user experiences. Champion engineering excellence by writing clean, modular, and maintainable code with a strong emphasis on testing and performance. Mentor and guide junior engineers through design reviews, code reviews, and pair programming sessions. Decompose complex problems into manageable components that can be driven incrementally and at scale. Assist in establishing and enforcing guidelines for front-end development, focusing on performance optimization, accessibility, and responsive build. Participate in sprint planning, technical design sessions, and retrospectives to improve development processes and team velocity. Contribute to team culture by fostering collaboration, innovation, and accountability.