Senior Software Development Engineer - GenAI

Overview In this role you will lead the design, delivery, and evolution of scalable GenAI services within Expedia Group’s GenAI Platform. You will collaborate with distributed teams to enable safe, observable AI-powered experiences at global scale. You’ll own end-to-end delivery, emphasize reliability and security, and help advance platform capabilities that empower product and ML teams. This is a chance to shape AI-driven infrastructure that touches travelers, partners, and internal users with guardrails and best practices. Compensation / Benefitsmedical, dental, and vision coveragepaid time offEmployee Assistance Programwellness and travel reimbursementtravel discountsIATAN membership ResponsibilitiesDrive end-to-end system design (LLD, API contracts, data modeling) aligned with architectural standardsCollaborate across geographically distributed teams to clarify decisions and ownershipOwn delivery from design to production, ensuring testing, security, observability, and operational readinessDefine and track metrics for reliability, performance, adoption, and costBuild reusable, self-service platform capabilities with sensible defaults and workload-specific flexibilityPartner with AI Registry team to set grading standards for AI assets (agents, MCP servers, skills)Work with LLM Inference team on intelligent routing, open-weight models, and fine-tuning pipelines Key requirementsBachelor’s degree in Computer Science or related field or equivalent professional experience8+ years building and operating backend services and APIs with end-to-end ownershipProficiency in Python with production-grade web services using FastAPI or similar (Flask, Django, etc.)Experience deploying backend APIs in public or hybrid cloud (AWS preferred) and at least one data store (Aurora PostgreSQL, Elasticsearch)Familiarity with AI-driven systems and exposure to LLMs, embeddings, RAG patternscross-functional collaborationclear technical communicationownership mindsetPythonFastAPI or similar async frameworksAPI design and data modeling