Software Development Engineer III - Full Stack

Expedia Group; Seattle (WA); On-site; USD 146,000 - 205,000; Full time

Benefits offered by this job

Medical, dental, vision coverage

Paid time off

Employee Assistance Program

Wellness and travel reimbursement

Travel discounts

IATAN membership

Job summary

Expedia Group is seeking a senior software engineer to design, build, and evolve full-stack services with scalable data models and secure APIs. You will own the lifecycle from development to deployment, ensuring reliability and observability across multiple services.

You will collaborate with product and design teams, applying data-driven methods and AI/ML concepts to real-world travel platforms. Seattle-based role with strong ownership expectations.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience in software development.
• 5+ years of professional experience building and operating production software services and full-stack applications (frontend and backend) within a team environment.
• Proven ownership of services or components, including responsibility for design, implementation, quality, deployment, and operational health within a product or domain area.
• Proficiency in core software engineering fundamentals, including data structures, algorithms, system design (LLD), API design, and data modeling, with experience applying these in real systems.
• Hands-on experience with modern web technologies, frameworks, and service architectures, and familiarity with using AI-driven tools or workflows to enhance developer productivity or product capabilities.

Responsibilities

• Design, build, and evolve full‑stack services and customer experiences, including system design (LLD), API design, and data modeling for scalable, secure, and reliable solutions.
• Implement high‑quality frontend and backend code, ensuring maintainability, observability, and operational excellence across multiple services and domains.
• Collaborate with product, design, and partner engineering teams to translate business and customer requirements into robust technical solutions that can be reused across use cases.
• Own and improve the end‑to‑end lifecycle of services and features, including development, automated testing, deployment, monitoring, and incident resolution.
• Apply data‑driven approaches to prioritize work, validate hypotheses, and continuously optimize system performance, reliability, and user experience.
• Safely integrate and operate AI/ML‑enabled solutions that improve outcomes, including familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products

Skills

Software fundamentals

Data structures

Algorithms

System design (LLD)

API design

Data modeling

Web technologies

AI/ML tools

Education

Bachelor’s degree in CS/Engineering or related field

Tools

Modern web frameworks

Service architectures

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.Our Technology Team partners with teams across Expedia Group 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.Introduction to the TeamThe Supply team builds and scales partner-facing technology that helps our partners succeed across the Expedia Group platform. We work at the intersection of product, engineering, and business operations to deliver reliable, high-impact solutions that improve partner experiences, enable growth, and support strategic initiatives across a global ecosystem.Our team values strong ownership, technical excellence, collaboration, and customer focus. We solve complex problems at scale, move quickly with purpose, and partner closely with cross-functional teams to deliver meaningful outcomes. Joining Supply means working on products and platforms that directly influence partner success and contribute to Expedia Group’s broader mission.In this role, you will:Design, build, and evolve full‑stack services and customer experiences, including system design (LLD), API design, and data modeling for scalable, secure, and reliable solutions.Implement high‑quality frontend and backend code, ensuring maintainability, observability, and operational excellence across multiple services and domains.Collaborate with product, design, and partner engineering teams to translate business and customer requirements into robust technical solutions that can be reused across use cases.Own and improve the end‑to‑end lifecycle of services and features, including development, automated testing, deployment, monitoring, and incident resolution.Apply data‑driven approaches to prioritize work, validate hypotheses, and continuously optimize system performance, reliability, and user experience.Safely integrate and operate AI/ML‑enabled solutions that improve outcomes, including familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products.Minimum Qualifications:Bachelor’s degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience in software development.5+ years of professional experience building and operating production software services and full‑stack applications (frontend and backend) within a team environment.Proven ownership of services or components, including responsibility for design, implementation, quality, deployment, and operational health within a product or domain area.Proficiency in core software engineering fundamentals, including data structures, algorithms, system design (LLD), API design, and data modeling, with experience applying these in real systems.Hands-on experience with modern web technologies, frameworks, and service architectures, and familiarity with using AI-driven tools or workflows to enhance developer productivity or product capabilities.Preferred Qualifications:Experience designing and evolving multi‑service or multi‑component architectures, including well‑structured APIs, data models, and integration patterns across systems.Demonstrated track record driving technical improvements at scale, such as performance tuning, resilience hardening, or reliability engineering for high‑traffic services and user interfaces.Strong focus on operational excellence, including instrumentation, observability, alerting, and participation in on‑call or incident response to improve long‑term service health.Ability to leverage experimentation, A/B testing, or analytics to make informed technical and product decisions and to validate the impact of delivered features.Experience integrating or extending AI/ML‑enabled capabilities in applications or services, including responsible use of AI-driven components in full‑stack solutions and guiding teams on effective, safe adoption of AI tooling.The total cash range for this position in Seattle is $146,000.00 to $204,500.00. Employees in this role have the potential to increase their pay up to $233,500.00, 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 perksExpedia 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 requestsExpedia 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 GroupExpedia 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.Important noticeEmployment 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. The official place to find and apply for roles is https://careers.expediagroup.com/jobs/ .Equal OpportunityExpedia 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.