Software Development Engineer II, Advertising Technology

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success.Why Join Us?To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win.We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. We’re building a more open world. Join us.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.Our TeamWe are the Expedia Group Advertising team. As a global leader in travel industry advertising, we connect advertisers with millions of travelers. This is a rapidly growing area of the business, with strong year-over-year growth, and a key area of long-term investment.Within this organization, you’ll join the Advertiser Team, which owns the advertiser-facing portal and the backend services and APIs that power it. These systems enable advertisers and third-party partners to configure, manage, and optimize ad campaigns across Expedia Group platforms.You will work collaboratively with engineers, product, and cross-functional partners across a globally distributed organization to build impactful solutions for advertisers and travelers worldwide.The RoleAs a Software Development Engineer II, you will play a critical role in building and scaling high-performance systems that support Expedia Group’s expanding advertising network. This role is primarily backend-focused (approximately 70–80%), with some frontend development (20–30%) supporting customer-facing experiences built in React.You will contribute to a multi-year initiative to design and evolve a unified advertising platform, consolidating multiple ad products into a single, scalable system. Your work will directly influence advertiser experiences and shared capabilities across the platform.In This Role, You WillDesign, build, test, and maintain scalable backend services and APIs that power the advertiser portal and enable third-party integrationsContribute to the development of a unified ads platform, delivering reusable capabilities across multiple advertising productsOwn features and services end-to-end—from design and implementation to deployment and operational supportApply strong coding fundamentals to deliver high-quality, maintainable, and extensible solutionsParticipate in system design, low-level design, API design (including GraphQL), and data modelingBuild customer-facing features (primarily backend-driven, with some React frontend contributions)Drive improvements in scalability, performance, and reliability for high-traffic advertiser systemsCollaborate with engineering, product, operations, and globally distributed teams to translate business needs into technical solutionsTroubleshoot production issues and improve system health through monitoring, debugging, automation, and observability practicesWrite secure, well-tested code, participate in code reviews, and follow engineering best practicesLeverage AI-enabled solutions and AI-assisted development tools to improve developer productivity and product outcomesMinimum QualificationsBachelor’s degree in Computer Science, Engineering, or related technical field, or equivalent practical experience3+ years of software development experience building and supporting production systems and servicesStrong foundation in data structures, algorithms, and core computer science fundamentalsExperience owning components or services, including implementation, testing, deployment, and operational supportExperience designing and building scalable backend systems and APIsProficiency in one or more of the following: Java, Kotlin (or ability to ramp quickly), and familiarity with ReactExperience with API design and consumption, including REST and/or GraphQLExperience working across multiple technical systems or services, with the ability to debug and deliver maintainable solutionsPreferred QualificationsExperience building software for advertising technology, marketplaces, or other high-scale distributed systemsExperience with event streaming or messaging systems (e.g., Flink, Kafka, or similar real-time data processing technologies)Experience contributing to architecture and design discussions for services, APIs, and data modelsDemonstrated ability to improve service quality through performance tuning, observability, and automationExperience using metrics and data to inform engineering decisions and measure impactFamiliarity with AI-driven systems and/or AI-assisted development tools (e.g., GitHub Copilot, Claude)Experience building customer-facing features, including frontend development with ReactBackground working on large-scale, high-throughput systems or platformsWhat You’ll BringA strong sense of ownership, with a track record of delivering solutions end-to-endAbility to collaborate effectively across teams and contribute to a highly collaborative engineering culturePassion for building scalable, high-performance systems and improving the developer and customer experienceInterest in solving complex problems in a fast-growing, high-impact area of the businessPlease note that this role is only available in Seattle, WA, in alignment with our flexible work model, which requires employees to be in the office at least three days a week. We are unable to offer relocation assistance for this role.Check out our Purpose & Behaviors!The total cash range for this position in Seattle is $119,000.00 to $166,500.00. Employees in this role have the potential to increase their pay up to $190,500.00, 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.Expedia Group is proud to offer a wide range of benefits to support employees and their families, including 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. View our full list of benefits .Accommodation requestsIf you need assistance with any part of the application or recruiting process due to a disability, or other physical or mental health conditions, please reach out to our Recruiting Accommodations Team through the Accommodation Request .We are proud to be named as a Best Place to Work on Glassdoor in 2024 and be recognized for award-winning culture by organizations like Forbes, TIME, Disability:IN, and others.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. 2024 Expedia, Inc. All rights reserved. Trademarks and logos are the property of their respective owners. CST: 2029030-50Employment opportunities and job offers at Expedia Group will always come from Expedia Group’s Talent Acquisition and hiring teams. Never provide sensitive, personal information to someone unless you’re confident who the recipient is. Expedia Group does not extend job offers via email or any other messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official website to find and apply for job openings at Expedia Group is careers.expediagroup.com/jobs .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. #J-18808-Ljbffr Expedia Group