The CompanyPayPal has been revolutionizing commerce globally for more than 25 years. Creating innovative experiences that make moving money, selling, and shopping simple, personalized, and secure, PayPal empowers consumers and businesses in approximately 200 markets to join and thrive in the global economy. We operate a global, two-sided network at scale that connects hundreds of millions of merchants and consumers. We help merchants and consumers connect, transact, and complete payments, whether they are online or in person. PayPal is more than a connection to third-party payment networks. We provide proprietary payment solutions accepted by merchants that enable the completion of payments on our platform on behalf of our customers.We offer our customers the flexibility to use their accounts to purchase and receive payments for goods and services, as well as the ability to transfer and withdraw funds. We enable consumers to exchange funds more safely with merchants using a variety of funding sources, which may include a bank account, a PayPal or Venmo account balance, PayPal and Venmo branded credit products, a credit card, a debit card, certain cryptocurrencies, or other stored value products such as gift cards, and eligible credit card rewards. Our PayPal, Venmo, and Xoom products also make it safer and simpler for friends and family to transfer funds to each other. We offer merchants an end-to-end payments solution that provides authorization and settlement capabilities, as well as instant access to funds and payouts. We also help merchants connect with their customers, process exchanges and returns, and manage risk. We enable consumers to engage in cross-border shopping and merchants to extend their global reach while reducing the complexity and friction involved in enabling cross-border trade. Our beliefs are the foundation for how we conduct business every day. We live each day guided by our core values of Inclusion, Innovation, Collaboration, and Wellness. Together, our values ensure that we work together as one global team with our customers at the center of everything we do - and they push us to ensure we take care of ourselves, each other, and our communities.Job Summary:Join PayPal's Consumer Product Catalog and Search team and help build the next generation of product discovery for millions of global shoppers. We own the backend and data infrastructure that powers search, recommendations, and catalog knowledge at global scale.As a Staff Backend Engineer, you'll contribute to key components of the product search stack - including ingestion, indexing, and query-time services that deliver fast and relevant search results. You'll collaborate closely with applied ML engineers and catalog data teams to enable intelligent, contextual, and scalable search capabilities. We're looking for motivated and collaborative engineers who enjoy solving complex problems in large-scale search systems. You will work on challenges such as query and document understanding, product entity modeling, taxonomy structuring, retrieval and ranking algorithms, and search quality evaluation. The ideal candidate has strong backend and data system experience, enjoys working across the full engineering lifecycle, and is eager to contribute to modern AI-powered search solutions.Job Description:What You'll Do Enhance and evolve high-performance search backend systems, including query processing, document indexing, retrieval and ranking, ElasticSearch clusters, and scalable APIs. Lead and participate in initiatives to modernize traditional keyword search by incorporating query intent understanding, semantic and vector-based retrieval and integrating LLM-driven components. Build scalable batch and streaming data pipelines to enrich product catalog data and search index. Optimize latency, reliability and observability of search endpoints. Evaluate search performance using offline metrics and live A/B experiments, driving continuous improvement. Drive a