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.

Responsibilities

• Define technical requirements in partnership with product, business, and engineering stakeholders
• Design, develop, and maintain Python-based applications & services that power core platform workflows
• Build and integrate scalable APIs and microservices for internal and external consumers
• Own backend system design for service reliability, scalability, maintainability, and operational excellence
• Optimize performance using distributed technologies (e.g., caching, message queues, event-driven architectures)
• Implement robust observability (logging, tracing, metrics), troubleshoot production issues, and improve system resiliency
• Participate in code reviews as both a contributor and reviewer; contribute to engineering standards and best practices
• Collaborate closely with development, QA, and business teams to deliver high-quality releases
• Create and maintain system and technical documentation as needed
• Leverage AI-powered development tools to improve productivity, code quality, and delivery speed
• Build and productionalize LLM-enabled features (e.g., workflow automation, intelligent routing, summarization, extraction)
• Design tool/function-calling services and orchestration layers for multi-step tasks
• Implement RAG-style retrieval patterns (embeddings, vector search, ranking) where it improves reliability and accuracy
• Develop 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 auditability

Skills

• BA/BS in Computer Science or a related field, or equivalent practical experience
• 5+ years of professional Python development experience in production environments
• Strong experience building asynchronous, API-driven microservices (e.g., FastAPI, asyncio)
• Solid understanding of scalable backend architectures and service-to-service integrations
• Experience with distributed systems patterns (queues, caching, pub/sub, background processing)
• Strong understanding of REST APIs, authentication/authorization, and secure system design
• Experience with CI/CD pipelines and containerized deployment workflows
• Strong familiarity with Git and modern version control workflows
• Excellent English communication skills, both written and verbal
• Ability to work effectively in cross-functional, fast-paced environments
• Experience integrating LLM APIs in production and building robust, testable AI-enabled services
• Familiarity with prompt design, structured outputs, tool/function calling, and conversation/workflow state management
• Experience with embeddings, vector databases, retrieval pipelines, and/or ranking approaches
• Experience 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 systems
• Proficiency in Spanish (or other major marketplace languages) to help evaluate and validate multilingual AI outputs
• Experience supporting high-traffic, consumer-facing applications

Benefits

• Target bonus
• Restricted stock units
• Full range of medical, financial, and/or other benefits
• 401(k) eligibility
• Various paid time off benefits, such as PTO and parental leave

Company Overview

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