Principal Software Development Engineer

11105 Expedia, Inc.; Seattle (WA); On-site; USD 231,000 - 324,000; Full time

Benefits offered by this job

Health benefits

Paid time off

Wellness program

Travel discounts

IATAN membership

Job summary

Expedia Group is seeking a Principal Software Development Engineer to lead architecture across Flight Search, Pricing, and Shopping platforms in Seattle. You’ll drive design, API development, and data modeling while mentoring teams to deliver secure, high-performance software.

Join a large-scale, AI-enabled environment with modern tooling (PyTorch/TensorFlow) and a focus on responsible AI, reliability, and measurable business impact. Equity in a fast-growing tech platform is offered.

Qualifications

• Bachelor’s degree in CS or a related field.
• 12+ years of relevant professional experience.
• Expertise in large-scale system architecture and multi-domain delivery.
• Proven track record in secure, scalable software systems.
• Familiarity with AI-driven systems and ML concepts.

Responsibilities

• Lead architectural vision across multiple technical domains.
• Drive system design, API development, and data modeling.
• Guide and mentor engineering teams for technical excellence.
• Safely integrate AI/ML-enabled solutions with best practices.
• Improve operational excellence with scalable processes.
• Collaborate with cross-functional partners to deliver solutions.

Skills

Large-scale system architecture

AI/ML concepts

Full stack engineering

Production ML systems

Education

Bachelor's degree in CS or related field

Tools

Pinecone

Weaviate

FAISS

TorchServe

TensorFlow Serving

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.

Principal Software Development Engineer

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 Air Shopping Platform organization owns the end-to-end platform that powers Flight Search, Pricing, and Shopping across all Expedia Group points of sale, partnering closely with product, analytics, and connectivity teams. We are responsible for building a reliable, highly performant, scalable, and cost-effective platform that delivers fast and relevant flight offers to the shopping experiences via Flight Search, Flight Details, and additional supporting APIs. The team is primarily accountable for driving flight transaction growth at Expedia Group across many, concurrent workstreams.

Responsibilities

• Lead the architectural vision, design, and delivery of complex software solutions across multiple technical domains.
• Drive system design, API development, and data modeling to ensure secure, maintainable, and high-performing platforms.
• Guide and mentor engineering teams, fostering technical excellence and innovation across projects and domains.
• Safely integrate and operate AI/ML-enabled solutions that improve outcomes, championing best practices in responsible AI deployment.
• Optimize operational excellence by implementing robust software development practices and scalable engineering processes.
• Collaborate with cross-functional partners to deliver resilient, business-aligned technology solutions and support continuous improvement.

Minimum Qualifications

• Bachelor’s degree in Computer Science or a related technical field; or equivalent related professional experience.
• 12+ years of relevant professional experience.
• Demonstrated expertise in large-scale system architecture, technical decision making, and delivery of complex multi-domain solutions.
• Proven track record in designing and operating secure, high-quality, and scalable software systems.
• Familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products.

Preferred Qualifications

• Experience leading architectural transformation and modernization initiatives for large, distributed systems.
• Demonstrated success guiding engineering organizations through periods of significant growth, change, or complexity.
• Expertise in full stack engineering with proven ability to operate across multiple technical domains and platforms.
• Track record of championing data-driven decision making and operational excellence for mission-critical systems.
• Experience building and deploying neural search and embedding-based retrieval systems, including vector databases (e.g., Pinecone, Weaviate, FAISS), semantic search architectures, and large-scale similarity search at scale with sub-100ms latency requirements.
• Strong experience with deep learning frameworks (PyTorch, TensorFlow) for production ML systems, including designing and deploying ranking models, personalization engines, and real-time inference pipelines with knowledge of model serving patterns (e.g., TorchServe, TensorFlow Serving, BentoML) and online/offline evaluation frameworks.

The total cash range for this position in Seattle is $231,000.00 to $323,500.00. Employees in this role have the potential to increase their pay up to $369,500.00, 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

• Medical, dental, and vision coverage
• Paid time off
• Employee Assistance Program
• Wellness and travel reimbursement
• Travel discounts
• International Airlines Travel Agent Network (IATAN) membership

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.

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.

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

Expedia Group's family of brands includes: Brand Expedia, Hotels.com, Expedia Partner Solutions, Vrbo, trivago, Orbitz, Travelocity, Hotwire, Wotif, ebookers, CheapTickets, Expedia Group Media Solutions, Expedia Local Expert, CarRentals.com, and Expedia Cruises. For more information, visit www.expediagroup.com.