[Remote] Senior Python Engineer, AI

Note: The job is a remote job and is open to candidates in USA. eBay is a global ecommerce leader committed to reinventing the future of shopping and selling. The Senior Python Engineer, AI will design, develop, and maintain scalable backend services and integrations, focusing on AI-powered features to enhance platform capabilities and support critical business workflows.ResponsibilitiesDefine technical requirements in partnership with product, business, and engineering stakeholdersDesign, develop, and maintain Python-based applications & services that power core platform workflowsBuild and integrate scalable APIs and microservices for internal and external consumersOwn backend system design for service reliability, scalability, maintainability, and operational excellenceOptimize performance using distributed technologies (e.g., caching, message queues, event-driven architectures)Implement robust observability (logging, tracing, metrics), troubleshoot production issues, and improve system resiliencyParticipate in code reviews as both a contributor and reviewer; contribute to engineering standards and best practicesCollaborate closely with development, QA, and business teams to deliver high-quality releasesCreate and maintain system and technical documentation as neededLeverage AI-powered development tools to improve productivity, code quality, and delivery speedBuild and productionalize LLM-enabled features (e.g., workflow automation, intelligent routing, summarization, extraction)Design tool/function-calling services and orchestration layers for multi-step tasksImplement RAG-style retrieval patterns (embeddings, vector search, ranking) where it improves reliability and accuracyDevelop evaluation and quality frameworks for AI outputs (offline evals, regression tests, safety/reliability checks)Collaborate on responsible AI practices: guardrails, data handling, deterministic behaviors, and auditabilitySkillsBA/BS in Computer Science or a related field, or equivalent practical experience5+ years of professional Python development experience in production environmentsStrong experience building asynchronous, API-driven microservices (e.g., FastAPI, asyncio)Solid understanding of scalable backend architectures and service-to-service integrationsExperience with distributed systems patterns (queues, caching, pub/sub, background processing)Strong understanding of REST APIs, authentication/authorization, and secure system designExperience with CI/CD pipelines and containerized deployment workflowsStrong familiarity with Git and modern version control workflowsExcellent English communication skills, both written and verbalAbility to work effectively in cross-functional, fast-paced environmentsExperience integrating LLM APIs in production and building robust, testable AI-enabled servicesFamiliarity with prompt design, structured outputs, tool/function calling, and conversation/workflow state managementExperience with embeddings, vector databases, retrieval pipelines, and/or ranking approachesExperience building AI evaluation harnesses (golden datasets, regression testing, quality metrics)Exposure to ML concepts relevant to applied product systems (classification, extraction, ranking, personalization)Experience with real-time or conversational interfaces (chat and/or voice) and streaming systemsProficiency in Spanish (or other major marketplace languages) to help evaluate and validate multilingual AI outputsExperience supporting high-traffic, consumer-facing applicationsBenefitsTarget bonusRestricted stock unitsFull range of medical, financial, and/or other benefits401(k) eligibilityVarious paid time off benefits, such as PTO and parental leaveCompany OvervieweBay is a global online marketplace enabling users to buy, sell, and auction new or used items across various categories. It was founded in 1995, and is headquartered in San Jose, California, USA, with a workforce of 10001+ employees. Its website is https://www.ebay.com/.Company H1B SponsorshipeBay has a track record of offering H1B sponsorships, with 122 in 2026, 570 in 2025, 883 in 2024, 779 in 2023, 682 in 2022, 748 in 2021, 766 in 2020. Please note that this does not guarantee sponsorship for this specific role.