Expedia

Senior Software Development Engineer - GenAI

Expedia
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2 days ago

Responsibilities

  • Drive end-to-end system design, including low-level design, API contracts, and data modeling.
  • Build, release, and operate scalable backend APIs, GenAI services, and multi-agent infrastructure.
  • Create reusable, extensible, and self-service platform capabilities for internal product and ML teams.
  • Partner with use-case, AI Registry, LLM Inference, product, applied science, and engineering teams.
  • Define guardrails and grading standards for AI agents, MCP servers, and skills covering quality, safety, reliability, and production readiness.
  • Design intelligent routing patterns, open-weight model deployments, and fine-tuning pipelines.
  • Track reliability, performance, adoption, and operating-cost metrics while ensuring testing, security, observability, and operational readiness.

Requirements

  • Bachelor’s degree in Computer Science or a related technical field, or equivalent related professional experience.
  • 8+ years of relevant professional experience building and operating backend services and APIs through deployment and ongoing support.
  • Proficiency in Python and production-grade web services using FastAPI or similar frameworks such as Flask or Django.
  • Strong understanding of system design, API design, and data modeling.
  • Experience operating backend APIs in public or hybrid cloud environments, with exposure to AWS or similar services and at least one relational, NoSQL, or search data store.
  • Familiarity with AI-driven systems and applying AI/ML concepts to products, including LLM capabilities, embeddings, or RAG patterns.
  • Preferred experience with high-scale Python backend APIs, performance tuning, resilience patterns, and multi-tenant services.
  • Preferred hands-on experience with RAG, vector stores, LangChain, LlamaIndex, LangGraph, LangSmith, Langfuse, Elasticsearch vector search, and Aurora PostgreSQL schemas.
  • Preferred experience building internal platforms, SDKs, or shared services adopted by multiple product teams.
  • Preferred experience designing workflow and agent orchestration solutions using tools such as n8n or Flowise.

Benefits

  • Medical, dental, and vision coverage.
  • Paid time off and an Employee Assistance Program.
  • Wellness and travel reimbursement.
  • Travel discounts and International Airlines Travel Agent Network membership.
  • Inclusive and accessible recruiting support, including disability accommodation requests.

Tech Stack

AWSDjangoElasticsearchFastAPIFlaskPostgreSQLPython
Expedia

About Expedia

10,000+ employees

Expedia Group builds a global online travel marketplace where consumers book flights, hotels, vacation rentals, cars, and activities, and partners distribute and market inventory across its platform. It monetizes through commissions, merchant/agency models, and advertising via brands including Expedia, Hotels.com, and Vrbo. Founded in 1996 and headquartered in Seattle, the public company (NASDAQ: EXPE) serves travelers and partners in more than 70 countries with B2C, B2B, and ad tech offerings.

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