Principal Software Development Engineer

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. 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. Salary & Benefits 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 include medical/dental/vision, paid time off, and an Employee Assistance Program. To fuel each employee’s passion for travel, we offer a wellness & travel reimbursement, travel discounts, and an International Airlines Travel Agent (IATAN) membership. EEO Statement 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. #J-18808-Ljbffr