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About the Role

As a Software Development Engineer II, you will build and scale high-performance systems for Expedia Group’s advertising network. You will contribute to a multi-year initiative to 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.

Responsibilities

Design, build, test, and maintain scalable backend services and APIs that power the advertiser portal and enable third-party integrations
Contribute to the development of a unified ads platform, delivering reusable capabilities across multiple advertising products
Own features and services end-to-end—from design and implementation to deployment and operational support
Apply strong coding fundamentals to deliver high-quality, maintainable, and extensible solutions
Participate in system design, low-level design, API design (including GraphQL), and data modeling
Build customer-facing features (primarily backend-driven, with some React frontend contributions)
Drive improvements in scalability, performance, and reliability for high-traffic advertiser systems
Collaborate with engineering, product, operations, and globally distributed teams to translate business needs into technical solutions
Troubleshoot production issues and improve system health through monitoring, debugging, automation, and observability practices
Write secure, well-tested code, participate in code reviews, and follow engineering best practices
Leverage AI-enabled solutions and AI-assisted development tools to improve developer productivity and product outcomes

Requirements

Bachelor’s degree in Computer Science, Engineering, or related technical field, or equivalent practical experience
3+ years of software development experience building and supporting production systems and services
Strong foundation in data structures, algorithms, and core computer science fundamentals
Experience owning components or services, including implementation, testing, deployment, and operational support
Experience designing and building scalable backend systems and APIs
Proficiency in one or more of the following: Java, Kotlin (or ability to ramp quickly), and familiarity with React
Experience with API design and consumption, including REST and/or GraphQL
Experience working across multiple technical systems or services, with the ability to debug and deliver maintainable solutions
Experience building software for advertising technology, marketplaces, or other high-scale distributed systems
Experience 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 models
Demonstrated ability to improve service quality through performance tuning, observability, and automation
Experience using metrics and data to inform engineering decisions and measure impact
Familiarity with AI-driven systems and/or AI-assisted development tools (e.g., GitHub Copilot, Claude)
Experience building customer-facing features, including frontend development with React
Background working on large-scale, high-throughput systems or platforms
A strong sense of ownership, with a track record of delivering solutions end-to-end
Ability to collaborate effectively across teams and contribute to a highly collaborative engineering culture
Passion for building scalable, high-performance systems and improving the developer and customer experience
Interest in solving complex problems in a fast-growing, high-impact area of the business

Skills

Java
Kotlin
React
REST
GraphQL
Flink
Kafka
AI-enabled solutions
AI-assisted development tools

Location

Chicago, IL

Work Type

Hybrid

Experience Level

3+ years of software development experience
Software Development Engineer II

Education Level

Bachelor’s degree in Computer Science, Engineering, or related technical field, or equivalent practical experience

Salary/Compensations

$111,000.00 - $155,500.00
Potential to increase pay up to $177,500.00 based on performance

Benefits

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

About the Company

Expedia Group helps travelers explore the world, one journey at a time.
We are 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.
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.
The Expedia Group Advertising team is a global leader in travel industry advertising, connecting 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.
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.

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.