Senior Software Development Engineer - GenAI

11105 Expedia, Inc.; Chicago (IL); On-site; USD 172,000 - 240,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

Paid time off

Employee Assistance Program

Wellness and travel reimbursement

Travel discounts

IATAN membership

Job summary

Expedia Group seeks a Senior Software Developer for the GenAI Platform to design and deliver scalable backend systems, APIs, and data models that power AI-driven experiences across our brands. You will partner with cross-functional teams, own delivery from design to production, and ensure reliability, security, and observability while advancing our platform capabilities and governance for GenAI assets.

This role offers the chance to influence architecture at scale, work with cutting-edge

Qualifications

• 8+ years of professional backend experience with end-to-end ownership.
• Proficient in Python and building production-grade web services with FastAPI or similar.
• Experience with cloud environments (AWS) and at least one data store like Aurora PostgreSQL or Elasticsearch.
• Familiarity with AI-driven systems and GenAI concepts.

Responsibilities

• Drive end-to-end system design, including low-level design, API contracts, and data modeling, aligned with architectural standards.
• Collaborate across geographically distributed teams to align on decisions and ownership.
• Partner with use-case teams to understand requirements and adoption of platform capabilities.
• Own delivery from design through implementation, release, and production operations with emphasis on testing, security, observability, and operational readiness.
• Define and track metrics for reliability, performance, adoption, and operating cost.
• Build with a platform mindset, creating reusable, extensible, self-service capabilities.
• Balance consistent interfaces with workload-specific flexibility.
• Coordinate with the AI Registry team on grading standards for AI assets and safety.

Skills

Python

FastAPI

APIs

AWS

Data modeling

GenAI

API design

Education

Bachelor’s degree in Computer Science or related field

Equivalent professional experience

Tools

Aurora PostgreSQL

Elasticsearch

LangChain

LangSmith

Langfuse

Job description

At Expedia Group, we help travelers explore the world, one journey at a time. As a global travel company powered by passionate people, trusted partnerships, and leading technology, we connect travelers, partners, and advertisers through our consumer brands, B2B network, and travel advertising business. Here, you'll do meaningful work that helps millions of people discover, book, and experience travel with more ease, confidence, and joy. Our five Behaviors-Traveler First, Think Big, Operate with Excellence, Ownership Mindset, and Succeed Together help foster a supportive environment where people can grow their careers and have the flexibility, benefits, and support to do their best work. Join us and build for travelers everywhere.

Introduction to the Team:

Expedia Technology teams partner with our Product teams to create innovative products, services and tools to deliver high-quality experiences for travelers, partners and our employees. A singular technology platform powered by data and machine learning provides secure, differentiated and personalized experiences that drive loyalty and traveler satisfaction.The Senior Software Developer role is part of the GenAI Platform team. The GenAI Platform team builds and operates Expedia Group’s shared generative AI platform - tooling, services, and guardrails - that enable product and ML teams to safely experiment with, deploy, and scale GenAI-powered experiences across our brands.

In this role, you will:

• Drive end-to-end system design, including low-level design (LLD), API contracts, and data modeling, aligned with Expedia’s architectural standards, engineering best practices, and long-term technical vision.
• Collaborate across geographically distributed teams, bringing clarity to technical decisions, ownership, and dependencies.
• Partner with use-case teams to understand their requirements and support adoption of platform capabilities.
• Own delivery from design through implementation, release, and production operations, ensuring high engineering quality through testing, security, observability, and operational readiness.
• Define and track metrics for reliability, performance, adoption, and operating cost.
• Build with a platform mindset, creating reusable, extensible, and self-service capabilities rather than one-off solutions.
• Balance consistent interfaces and sensible defaults with flexibility for workload-specific needs.
• Partner with the AI Registry team to define and implement grading standards for AI assets, including AI agents, MCP servers, and skills, with clear criteria for quality, safety, reliability, and production readiness.
• Work closely with the LLM Inference team to design and deliver intelligent routing patterns, open-weight model deployments, and fine-tuning pipelines, balancing model quality, latency, reliability, and cost.

Minimum Qualifications:

• Bachelor’s degree in Computer Science or a related technical field; or Equivalent related professional experience.
• 8+ years of relevant professional experience, including building and operating backend services and APIs with end-to-end ownership from design through deployment and ongoing operational support.
• Proven proficiency in Python and experience developing production-grade web services using FastAPI or similar modern frameworks (such as Flask, Django, or other async service frameworks), with solid understanding of system design, API design, and data modeling.
• Experience building and running backend APIs in public or hybrid cloud environments, with hands‑on exposure to core cloud services (AWS preferred) and at least one data store technology (relational, NoSQL, or search), such as Aurora PostgreSQL or Elasticsearch.
• Familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products, including exposure to LLM-powered capabilities, embeddings, or RAG patterns, or demonstrated ability to ramp up quickly using internal GenAI Platform tools and documentation.

Preferred Qualifications:

• Deep experience building and operating Python-based backend APIs at scale on AWS or similar cloud providers, including performance tuning, resilience patterns, and advanced API and data modeling for high-traffic or multi-tenant services.
• Hands‑on experience with RAG and vector store tooling (for example, LangChain, LlamaIndex, LangGraph) and evaluation or observability frameworks (such as LangSmith or Langfuse), including safely integrating and operating AI/ML‑enabled solutions that improve outcomes.
• Experience integrating and optimizing LLM‑powered systems end to end, including prompt and retrieval design, embeddings management, Elasticsearch vector search, Aurora PostgreSQL schemas, and platform-level guardrails such as auth, quota, and evaluation hooks.
• Background building internal platforms, SDKs, or shared services adopted by multiple product teams, including clear documentation, paved road patterns, and close collaboration with cross-functional partners (product management, applied science, and engineering).
• Experience designing or implementing workflow and agent orchestration–based solutions (for example, using n8n, Flowise, or similar) to build multi‑tool or multi‑agent GenAI applications, and familiarity with AI-driven platform architectures and safety‑by‑design practices.

The total cash range for this position in Chicago is $171,500.00 to $240,000.00. Employees in this role have the potential to increase their pay up to $274,500.00, which is the top of the range, based on ongoing, demonstrated, and sustained performance in the role. Starting pay for this role will vary based on multiple factors, including location, available budget, and an individual’s knowledge, skills, and experience. Pay ranges may be modified in the future.

Benefits and perks

Expedia Group offers benefits and perks designed to support employees and their families, including medical, dental, and vision coverage, paid time off, an Employee Assistance Program, wellness and travel reimbursement, travel discounts, and International Airlines Travel Agent Network (IATAN) membership.

Learn more about life at Expedia Group at https://careers.expediagroup.com/life.

Accommodation requests

Expedia Group is committed to providing an inclusive and accessible recruiting experience. If you need an accommodation or adjustment due to a disability during the application or recruiting process, please submit a request at https://expedia.service-now.com/askeg?id=job_accommodation.

About Expedia Group

Expedia Group includes three flagship consumer brands - Expedia, Hotels.com, and Vrbo - along with a leading B2B travel business and travel advertising offerings. Across our brands and business, we help travelers explore the world with confidence and ease.

Employment opportunities and job offers at Expedia Group will always come from Expedia Group’s Talent Acquisition and hiring teams. Never share sensitive personal information unless you are confident of the recipient. Expedia Group does not extend job offers via email or messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com.

Equal Opportunity

Expedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other characteristic protected by law. This employer participates in E-Verify. The employer will provide the Social Security Administration (SSA) and, if necessary, the Department of Homeland Security (DHS) with information from each new employee’s I‑9 to confirm work authorization.

Expedia Group, Inc. (NASDAQ: EXPE) is the global travel marketplace with one purpose: to help travelers explore the world, one journey at a time. Expedia Group™ connects travelers, partners, and advertisers through its trusted brands, leading technology, and rich first‑party data, delivering predictive, personalized experiences that shape the future of travel. Expedia Group’s ecosystem includes three flagship consumer brands – Expedia®, Hotels.com®, and Vrbo® – the largest B2B travel business, and a premier advertising network. Guided by an experienced and passionate global team, Expedia Group helps millions of travelers in more than 70 countries explore the world with confidence and ease.