eBay is seeking a Senior Python Engineer, AI to design, develop, and maintain scalable backend services and AI-powered platform capabilities for their Nexpart B2B marketplace.

Company: eBay

Role: Senior Python Engineer, AI

Location: Remote, United States

Experience:

5+ years of professional Python development experience in production environments

Key Skills:

Python
FastAPI
asyncio
API-driven microservices
distributed systems patterns
caching
message queues
event-driven architectures
REST APIs
authentication/authorization
secure system design
CI/CD pipelines
containerized deployment workflows
Git
LLM APIs
embeddings
vector search
ranking
AI evaluation frameworks

Qualification:

BA/BS in Computer Science or a related field or equivalent practical experience

Role Focus:

Define technical requirements with product, business, and engineering stakeholders
Design, develop, and maintain Python-based applications and services for core platform workflows
Build and integrate scalable APIs and microservices for internal and external consumers
Own backend system design for reliability, scalability, maintainability, and operational excellence
Optimize performance using distributed technologies
Implement observability including logging, tracing, and metrics
Troubleshoot production issues and improve system resiliency
Participate in code reviews and contribute to engineering standards
Collaborate with development, QA, and business teams to deliver high-quality releases
Create and maintain system and technical documentation
Leverage AI-powered development tools to improve productivity and code quality
Build and productionalize LLM-enabled features such as workflow automation and intelligent routing
Design tool/function-calling services and orchestration layers for multi-step tasks
Implement RAG-style retrieval patterns to improve reliability and accuracy
Develop evaluation and quality frameworks for AI outputs
Collaborate on responsible AI practices including guardrails, data handling, and auditability

Additional responsibilities:

Support high-traffic, consumer-facing applications
Work effectively in cross-functional, fast-paced environments

Nice to have:

Experience integrating LLM APIs in production
Familiarity with prompt design, structured outputs, and conversation/workflow state management
Experience with embeddings, vector databases, retrieval pipelines, and ranking approaches
Experience building AI evaluation harnesses with golden datasets and regression testing
Exposure to ML concepts such as classification, extraction, ranking, and personalization
Experience with real-time or conversational interfaces and streaming systems
Proficiency in Spanish or other major marketplace languages

Other:

Work on a global marketplace platform at scale
Opportunity to influence technical direction and architecture
Culture valuing innovation, ownership, and continuous learning
Competitive compensation including base pay, target bonus, and restricted stock units
Comprehensive benefits including medical, financial, 401(k), PTO, and parental leave
At-will employment with potential salary adjustments based on performance and market factors
Equal opportunity employer with commitment to accessibility and accommodation

Senior Python Engineer, AI

Skills Required

Description